diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 38 | ||||
| -rw-r--r-- | mm/frame_vector.c | 2 | ||||
| -rw-r--r-- | mm/gup.c | 38 | ||||
| -rw-r--r-- | mm/huge_memory.c | 4 | ||||
| -rw-r--r-- | mm/hugetlb.c | 2 | ||||
| -rw-r--r-- | mm/internal.h | 4 | ||||
| -rw-r--r-- | mm/khugepaged.c | 34 | ||||
| -rw-r--r-- | mm/ksm.c | 12 | ||||
| -rw-r--r-- | mm/maccess.c | 4 | ||||
| -rw-r--r-- | mm/madvise.c | 20 | ||||
| -rw-r--r-- | mm/memcontrol.c | 2 | ||||
| -rw-r--r-- | mm/memory.c | 40 | ||||
| -rw-r--r-- | mm/mempolicy.c | 12 | ||||
| -rw-r--r-- | mm/migrate.c | 4 | ||||
| -rw-r--r-- | mm/mlock.c | 6 | ||||
| -rw-r--r-- | mm/mmap.c | 36 | ||||
| -rw-r--r-- | mm/mmu_gather.c | 2 | ||||
| -rw-r--r-- | mm/mmu_notifier.c | 10 | ||||
| -rw-r--r-- | mm/mprotect.c | 8 | ||||
| -rw-r--r-- | mm/mremap.c | 8 | ||||
| -rw-r--r-- | mm/nommu.c | 6 | ||||
| -rw-r--r-- | mm/oom_kill.c | 2 | ||||
| -rw-r--r-- | mm/pagewalk.c | 6 | ||||
| -rw-r--r-- | mm/rmap.c | 12 | ||||
| -rw-r--r-- | mm/shmem.c | 4 | ||||
| -rw-r--r-- | mm/swap_state.c | 4 | ||||
| -rw-r--r-- | mm/userfaultfd.c | 8 | ||||
| -rw-r--r-- | mm/util.c | 2 |
28 files changed, 165 insertions, 165 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 950cf12a10fc..f0ae9a6308cb 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -76,16 +76,16 @@ * ->i_mutex * ->i_mmap_rwsem (truncate->unmap_mapping_range) * - * ->mmap_sem + * ->mmap_lock * ->i_mmap_rwsem * ->page_table_lock or pte_lock (various, mainly in memory.c) * ->i_pages lock (arch-dependent flush_dcache_mmap_lock) * - * ->mmap_sem + * ->mmap_lock * ->lock_page (access_process_vm) * * ->i_mutex (generic_perform_write) - * ->mmap_sem (fault_in_pages_readable->do_page_fault) + * ->mmap_lock (fault_in_pages_readable->do_page_fault) * * bdi->wb.list_lock * sb_lock (fs/fs-writeback.c) @@ -1371,21 +1371,21 @@ EXPORT_SYMBOL_GPL(__lock_page_killable); /* * Return values: - * 1 - page is locked; mmap_sem is still held. + * 1 - page is locked; mmap_lock is still held. * 0 - page is not locked. * mmap_lock has been released (mmap_read_unlock(), unless flags had both * FAULT_FLAG_ALLOW_RETRY and FAULT_FLAG_RETRY_NOWAIT set, in - * which case mmap_sem is still held. + * which case mmap_lock is still held. * * If neither ALLOW_RETRY nor KILLABLE are set, will always return 1 - * with the page locked and the mmap_sem unperturbed. + * with the page locked and the mmap_lock unperturbed. */ int __lock_page_or_retry(struct page *page, struct mm_struct *mm, unsigned int flags) { if (fault_flag_allow_retry_first(flags)) { /* - * CAUTION! In this case, mmap_sem is not released + * CAUTION! In this case, mmap_lock is not released * even though return 0. */ if (flags & FAULT_FLAG_RETRY_NOWAIT) @@ -2313,14 +2313,14 @@ EXPORT_SYMBOL(generic_file_read_iter); #ifdef CONFIG_MMU #define MMAP_LOTSAMISS (100) /* - * lock_page_maybe_drop_mmap - lock the page, possibly dropping the mmap_sem + * lock_page_maybe_drop_mmap - lock the page, possibly dropping the mmap_lock * @vmf - the vm_fault for this fault. * @page - the page to lock. * @fpin - the pointer to the file we may pin (or is already pinned). * - * This works similar to lock_page_or_retry in that it can drop the mmap_sem. + * This works similar to lock_page_or_retry in that it can drop the mmap_lock. * It differs in that it actually returns the page locked if it returns 1 and 0 - * if it couldn't lock the page. If we did have to drop the mmap_sem then fpin + * if it couldn't lock the page. If we did have to drop the mmap_lock then fpin * will point to the pinned file and needs to be fput()'ed at a later point. */ static int lock_page_maybe_drop_mmap(struct vm_fault *vmf, struct page *page, @@ -2331,7 +2331,7 @@ static int lock_page_maybe_drop_mmap(struct vm_fault *vmf, struct page *page, /* * NOTE! This will make us return with VM_FAULT_RETRY, but with - * the mmap_sem still held. That's how FAULT_FLAG_RETRY_NOWAIT + * the mmap_lock still held. That's how FAULT_FLAG_RETRY_NOWAIT * is supposed to work. We have way too many special cases.. */ if (vmf->flags & FAULT_FLAG_RETRY_NOWAIT) @@ -2341,10 +2341,10 @@ static int lock_page_maybe_drop_mmap(struct vm_fault *vmf, struct page *page, if (vmf->flags & FAULT_FLAG_KILLABLE) { if (__lock_page_killable(page)) { /* - * We didn't have the right flags to drop the mmap_sem, + * We didn't have the right flags to drop the mmap_lock, * but all fault_handlers only check for fatal signals * if we return VM_FAULT_RETRY, so we need to drop the - * mmap_sem here and return 0 if we don't have a fpin. + * mmap_lock here and return 0 if we don't have a fpin. */ if (*fpin == NULL) mmap_read_unlock(vmf->vma->vm_mm); @@ -2409,7 +2409,7 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf) /* * Asynchronous readahead happens when we find the page and PG_readahead, * so we want to possibly extend the readahead further. We return the file that - * was pinned if we have to drop the mmap_sem in order to do IO. + * was pinned if we have to drop the mmap_lock in order to do IO. */ static struct file *do_async_mmap_readahead(struct vm_fault *vmf, struct page *page) @@ -2444,12 +2444,12 @@ static struct file *do_async_mmap_readahead(struct vm_fault *vmf, * it in the page cache, and handles the special cases reasonably without * having a lot of duplicated code. * - * vma->vm_mm->mmap_sem must be held on entry. + * vma->vm_mm->mmap_lock must be held on entry. * - * If our return value has VM_FAULT_RETRY set, it's because the mmap_sem + * If our return value has VM_FAULT_RETRY set, it's because the mmap_lock * may be dropped before doing I/O or by lock_page_maybe_drop_mmap(). * - * If our return value does not have VM_FAULT_RETRY set, the mmap_sem + * If our return value does not have VM_FAULT_RETRY set, the mmap_lock * has not been released. * * We never return with VM_FAULT_RETRY and a bit from VM_FAULT_ERROR set. @@ -2519,7 +2519,7 @@ retry_find: goto page_not_uptodate; /* - * We've made it this far and we had to drop our mmap_sem, now is the + * We've made it this far and we had to drop our mmap_lock, now is the * time to return to the upper layer and have it re-find the vma and * redo the fault. */ @@ -2569,7 +2569,7 @@ page_not_uptodate: out_retry: /* - * We dropped the mmap_sem, we need to return to the fault handler to + * We dropped the mmap_lock, we need to return to the fault handler to * re-find the vma and come back and find our hopefully still populated * page. */ diff --git a/mm/frame_vector.c b/mm/frame_vector.c index c2578e1a2bb7..10f82d5643b6 100644 --- a/mm/frame_vector.c +++ b/mm/frame_vector.c @@ -29,7 +29,7 @@ * different type underlying the specified range of virtual addresses. * When the function isn't able to map a single page, it returns error. * - * This function takes care of grabbing mmap_sem as necessary. + * This function takes care of grabbing mmap_lock as necessary. */ int get_vaddr_frames(unsigned long start, unsigned int nr_frames, unsigned int gup_flags, struct frame_vector *vec) @@ -592,7 +592,7 @@ retry: pmdval = READ_ONCE(*pmd); /* * MADV_DONTNEED may convert the pmd to null because - * mmap_sem is held in read mode + * mmap_lock is held in read mode */ if (pmd_none(pmdval)) return no_page_table(vma, flags); @@ -855,8 +855,8 @@ unmap: } /* - * mmap_sem must be held on entry. If @locked != NULL and *@flags - * does not include FOLL_NOWAIT, the mmap_sem may be released. If it + * mmap_lock must be held on entry. If @locked != NULL and *@flags + * does not include FOLL_NOWAIT, the mmap_lock may be released. If it * is, *@locked will be set to 0 and -EBUSY returned. */ static int faultin_page(struct task_struct *tsk, struct vm_area_struct *vma, @@ -979,7 +979,7 @@ static int check_vma_flags(struct vm_area_struct *vma, unsigned long gup_flags) * only intends to ensure the pages are faulted in. * @vmas: array of pointers to vmas corresponding to each page. * Or NULL if the caller does not require them. - * @locked: whether we're still with the mmap_sem held + * @locked: whether we're still with the mmap_lock held * * Returns either number of pages pinned (which may be less than the * number requested), or an error. Details about the return value: @@ -992,9 +992,9 @@ static int check_vma_flags(struct vm_area_struct *vma, unsigned long gup_flags) * * The caller is responsible for releasing returned @pages, via put_page(). * - * @vmas are valid only as long as mmap_sem is held. + * @vmas are valid only as long as mmap_lock is held. * - * Must be called with mmap_sem held. It may be released. See below. + * Must be called with mmap_lock held. It may be released. See below. * * __get_user_pages walks a process's page tables and takes a reference to * each struct page that each user address corresponds to at a given @@ -1015,12 +1015,12 @@ static int check_vma_flags(struct vm_area_struct *vma, unsigned long gup_flags) * appropriate) must be called after the page is finished with, and * before put_page is called. * - * If @locked != NULL, *@locked will be set to 0 when mmap_sem is + * If @locked != NULL, *@locked will be set to 0 when mmap_lock is * released by an up_read(). That can happen if @gup_flags does not * have FOLL_NOWAIT. * * A caller using such a combination of @locked and @gup_flags - * must therefore hold the mmap_sem for reading only, and recognize + * must therefore hold the mmap_lock for reading only, and recognize * when it's been released. Otherwise, it must be held for either * reading or writing and will not be released. * @@ -1083,7 +1083,7 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, if (locked && *locked == 0) { /* * We've got a VM_FAULT_RETRY - * and we've lost mmap_sem. + * and we've lost mmap_lock. * We must stop here. */ BUG_ON(gup_flags & FOLL_NOWAIT); @@ -1190,7 +1190,7 @@ static bool vma_permits_fault(struct vm_area_struct *vma, * @mm: mm_struct of target mm * @address: user address * @fault_flags:flags to pass down to handle_mm_fault() - * @unlocked: did we unlock the mmap_sem while retrying, maybe NULL if caller + * @unlocked: did we unlock the mmap_lock while retrying, maybe NULL if caller * does not allow retry. If NULL, the caller must guarantee * that fault_flags does not contain FAULT_FLAG_ALLOW_RETRY. * @@ -1211,8 +1211,8 @@ static bool vma_permits_fault(struct vm_area_struct *vma, * such architectures, gup() will not be enough to make a subsequent access * succeed. * - * This function will not return with an unlocked mmap_sem. So it has not the - * same semantics wrt the @mm->mmap_sem as does filemap_fault(). + * This function will not return with an unlocked mmap_lock. So it has not the + * same semantics wrt the @mm->mmap_lock as does filemap_fault(). */ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, unsigned long address, unsigned int fault_flags, @@ -1400,13 +1400,13 @@ retry: * @vma: target vma * @start: start address * @end: end address - * @locked: whether the mmap_sem is still held + * @locked: whether the mmap_lock is still held * * This takes care of mlocking the pages too if VM_LOCKED is set. * * return 0 on success, negative error code on error. * - * vma->vm_mm->mmap_sem must be held. + * vma->vm_mm->mmap_lock must be held. * * If @locked is NULL, it may be held for read or write and will * be unperturbed. @@ -1458,7 +1458,7 @@ long populate_vma_page_range(struct vm_area_struct *vma, * * This is used to implement mlock() and the MAP_POPULATE / MAP_LOCKED mmap * flags. VMAs must be already marked with the desired vm_flags, and - * mmap_sem must not be held. + * mmap_lock must not be held. */ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors) { @@ -1525,7 +1525,7 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors) * NULL wherever the ZERO_PAGE, or an anonymous pte_none, has been found - * allowing a hole to be left in the corefile to save diskspace. * - * Called without mmap_sem, but after all other threads have been killed. + * Called without mmap_lock, but after all other threads have been killed. */ #ifdef CONFIG_ELF_CORE struct page *get_dump_page(unsigned long addr) @@ -1886,9 +1886,9 @@ static long __get_user_pages_remote(struct task_struct *tsk, * * The caller is responsible for releasing returned @pages, via put_page(). * - * @vmas are valid only as long as mmap_sem is held. + * @vmas are valid only as long as mmap_lock is held. * - * Must be called with mmap_sem held for read or write. + * Must be called with mmap_lock held for read or write. * * get_user_pages_remote walks a process's page tables and takes a reference * to each struct page that each user address corresponds to at a given @@ -2873,7 +2873,7 @@ EXPORT_SYMBOL_GPL(get_user_pages_fast_only); * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * - * Attempt to pin user pages in memory without taking mm->mmap_sem. + * Attempt to pin user pages in memory without taking mm->mmap_lock. * If not successful, it will fall back to taking the lock and * calling get_user_pages(). * diff --git a/mm/huge_memory.c b/mm/huge_memory.c index de201f0b5a4a..78c84bee7e29 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1746,7 +1746,7 @@ bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, /* * We don't have to worry about the ordering of src and dst - * ptlocks because exclusive mmap_sem prevents deadlock. + * ptlocks because exclusive mmap_lock prevents deadlock. */ old_ptl = __pmd_trans_huge_lock(old_pmd, vma); if (old_ptl) { @@ -2618,7 +2618,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) if (PageAnon(head)) { /* - * The caller does not necessarily hold an mmap_sem that would + * The caller does not necessarily hold an mmap_lock that would * prevent the anon_vma disappearing so we first we take a * reference to it and then lock the anon_vma for write. This * is similar to page_lock_anon_vma_read except the write lock diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f102eb82f81d..57ece74e3aae 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4695,7 +4695,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, (const void __user *) src_addr, pages_per_huge_page(h), false); - /* fallback to copy_from_user outside mmap_sem */ + /* fallback to copy_from_user outside mmap_lock */ if (unlikely(ret)) { ret = -ENOENT; *pagep = page; diff --git a/mm/internal.h b/mm/internal.h index 3d3eb867030a..9886db20d94f 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -344,7 +344,7 @@ static inline void munlock_vma_pages_all(struct vm_area_struct *vma) } /* - * must be called with vma's mmap_sem held for read or write, and page locked. + * must be called with vma's mmap_lock held for read or write, and page locked. */ extern void mlock_vma_page(struct page *page); extern unsigned int munlock_vma_page(struct page *page); @@ -413,7 +413,7 @@ static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf, /* * FAULT_FLAG_RETRY_NOWAIT means we don't want to wait on page locks or - * anything, so we only pin the file and drop the mmap_sem if only + * anything, so we only pin the file and drop the mmap_lock if only * FAULT_FLAG_ALLOW_RETRY is set, while this is the first attempt. */ if (fault_flag_allow_retry_first(flags) && diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 2c318ad1db20..b043c40a21d4 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -534,7 +534,7 @@ void __khugepaged_exit(struct mm_struct *mm) * under mmap sem read mode). Stop here (after we * return all pagetables will be destroyed) until * khugepaged has finished working on the pagetables - * under the mmap_sem. + * under the mmap_lock. */ mmap_write_lock(mm); mmap_write_unlock(mm); @@ -933,8 +933,8 @@ khugepaged_alloc_page(struct page **hpage, gfp_t gfp, int node) #endif /* - * If mmap_sem temporarily dropped, revalidate vma - * before taking mmap_sem. + * If mmap_lock temporarily dropped, revalidate vma + * before taking mmap_lock. * Return 0 if succeeds, otherwise return none-zero * value (scan code). */ @@ -966,7 +966,7 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address, * Only done if khugepaged_scan_pmd believes it is worthwhile. * * Called and returns without pte mapped or spinlocks held, - * but with mmap_sem held to protect against vma changes. + * but with mmap_lock held to protect against vma changes. */ static bool __collapse_huge_page_swapin(struct mm_struct *mm, @@ -993,7 +993,7 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm, swapped_in++; ret = do_swap_page(&vmf); - /* do_swap_page returns VM_FAULT_RETRY with released mmap_sem */ + /* do_swap_page returns VM_FAULT_RETRY with released mmap_lock */ if (ret & VM_FAULT_RETRY) { mmap_read_lock(mm); if (hugepage_vma_revalidate(mm, address, &vmf.vma)) { @@ -1047,9 +1047,9 @@ static void collapse_huge_page(struct mm_struct *mm, gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE; /* - * Before allocating the hugepage, release the mmap_sem read lock. + * Before allocating the hugepage, release the mmap_lock read lock. * The allocation can take potentially a long time if it involves - * sync compaction, and we do not need to hold the mmap_sem during + * sync compaction, and we do not need to hold the mmap_lock during * that. We will recheck the vma after taking it again in write mode. */ mmap_read_unlock(mm); @@ -1080,8 +1080,8 @@ static void collapse_huge_page(struct mm_struct *mm, } /* - * __collapse_huge_page_swapin always returns with mmap_sem locked. - * If it fails, we release mmap_sem and jump out_nolock. + * __collapse_huge_page_swapin always returns with mmap_lock locked. + * If it fails, we release mmap_lock and jump out_nolock. * Continuing to collapse causes inconsistency. */ if (unmapped && !__collapse_huge_page_swapin(mm, vma, address, @@ -1345,7 +1345,7 @@ out_unmap: pte_unmap_unlock(pte, ptl); if (ret) { node = khugepaged_find_target_node(); - /* collapse_huge_page will return with the mmap_sem released */ + /* collapse_huge_page will return with the mmap_lock released */ collapse_huge_page(mm, address, hpage, node, referenced, unmapped); } @@ -1547,7 +1547,7 @@ static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff) * later. * * Not that vma->anon_vma check is racy: it can be set up after - * the check but before we took mmap_sem by the fault path. + * the check but before we took mmap_lock by the fault path. * But page lock would prevent establishing any new ptes of the * page, so we are safe. * @@ -1567,10 +1567,10 @@ static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff) if (!pmd) continue; /* - * We need exclusive mmap_sem to retract page table. + * We need exclusive mmap_lock to retract page table. * * We use trylock due to lock inversion: we need to acquire - * mmap_sem while holding page lock. Fault path does it in + * mmap_lock while holding page lock. Fault path does it in * reverse order. Trylock is a way to avoid deadlock. */ if (mmap_write_trylock(vma->vm_mm)) { @@ -2058,7 +2058,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, */ vma = NULL; if (unlikely(!mmap_read_trylock(mm))) - goto breakouterloop_mmap_sem; + goto breakouterloop_mmap_lock; if (likely(!khugepaged_test_exit(mm))) vma = find_vma(mm, khugepaged_scan.address); @@ -2115,15 +2115,15 @@ skip: khugepaged_scan.address += HPAGE_PMD_SIZE; progress += HPAGE_PMD_NR; if (ret) - /* we released mmap_sem so break loop */ - goto breakouterloop_mmap_sem; + /* we released mmap_lock so break loop */ + goto breakouterloop_mmap_lock; if (progress >= pages) goto breakouterloop; } } breakouterloop: mmap_read_unlock(mm); /* exit_mmap will destroy ptes after this */ -breakouterloop_mmap_sem: +breakouterloop_mmap_lock: spin_lock(&khugepaged_mm_lock); VM_BUG_ON(khugepaged_scan.mm_slot != mm_slot); @@ -442,7 +442,7 @@ static void insert_to_mm_slots_hash(struct mm_struct *mm, /* * ksmd, and unmerge_and_remove_all_rmap_items(), must not touch an mm's * page tables after it has passed through ksm_exit() - which, if necessary, - * takes mmap_sem briefly to serialize against them. ksm_exit() does not set + * takes mmap_lock briefly to serialize against them. ksm_exit() does not set * a special flag: they can just back out as soon as mm_users goes to zero. * ksm_test_exit() is used throughout to make this test for exit: in some * places for correctness, in some places just to avoid unnecessary work. @@ -831,7 +831,7 @@ static void remove_trailing_rmap_items(struct mm_slot *mm_slot, * Though it's very tempting to unmerge rmap_items from stable tree rather * than check every pte of a given vma, the locking doesn't quite work for * that - an rmap_item is assigned to the stable tree after inserting ksm - * page and upping mmap_sem. Nor does it fit with the way we skip dup'ing + * page and upping mmap_lock. Nor does it fit with the way we skip dup'ing * rmap_items from parent to child at fork time (so as not to waste time * if exit comes before the next scan reaches it). * @@ -1292,7 +1292,7 @@ static int try_to_merge_with_ksm_page(struct rmap_item *rmap_item, /* Unstable nid is in union with stable anon_vma: remove first */ remove_rmap_item_from_tree(rmap_item); - /* Must get reference to anon_vma while still holding mmap_sem */ + /* Must get reference to anon_vma while still holding mmap_lock */ rmap_item->anon_vma = vma->anon_vma; get_anon_vma(vma->anon_vma); out: @@ -2343,13 +2343,13 @@ next_mm: struct mm_slot, mm_list); if (ksm_scan.address == 0) { /* - * We've completed a full scan of all vmas, holding mmap_sem + * We've completed a full scan of all vmas, holding mmap_lock * throughout, and found no VM_MERGEABLE: so do the same as * __ksm_exit does to remove this mm from all our lists now. * This applies either when cleaning up after __ksm_exit * (but beware: we can reach here even before __ksm_exit), * or when all VM_MERGEABLE areas have been unmapped (and - * mmap_sem then protects against race with MADV_MERGEABLE). + * mmap_lock then protects against race with MADV_MERGEABLE). */ hash_del(&slot->link); list_del(&slot->mm_list); @@ -2536,7 +2536,7 @@ void __ksm_exit(struct mm_struct *mm) * This process is exiting: if it's straightforward (as is the * case when ksmd was never running), free mm_slot immediately. * But if it's at the cursor or has rmap_items linked to it, use - * mmap_sem to synchronize with any break_cows before pagetables + * mmap_lock to synchronize with any break_cows before pagetables * are freed, and leave the mm_slot on the list for ksmd to free. * Beware: ksm may already have noticed it exiting and freed the slot. */ diff --git a/mm/maccess.c b/mm/maccess.c index 3ca8d97e5010..81df3b788284 100644 --- a/mm/maccess.c +++ b/mm/maccess.c @@ -40,9 +40,9 @@ probe_write_common(void __user *dst, const void *src, size_t size) * happens, handle that and return -EFAULT. * * We ensure that the copy_from_user is executed in atomic context so that - * do_page_fault() doesn't attempt to take mmap_sem. This makes + * do_page_fault() doesn't attempt to take mmap_lock. This makes * probe_kernel_read() suitable for use within regions where the caller - * already holds mmap_sem, or other locks which nest inside mmap_sem. + * already holds mmap_lock, or other locks which nest inside mmap_lock. * * probe_kernel_read_strict() is the same as probe_kernel_read() except for * the case where architectures have non-overlapping user and kernel address diff --git a/mm/madvise.c b/mm/madvise.c index d9b0f66b4396..dd1d43cf026d 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -40,7 +40,7 @@ struct madvise_walk_private { /* * Any behaviour which results in changes to the vma->vm_flags needs to - * take mmap_sem for writing. Others, which simply traverse vmas, need + * take mmap_lock for writing. Others, which simply traverse vmas, need * to only take it for reading. */ static int madvise_need_mmap_write(int behavior) @@ -165,7 +165,7 @@ static long madvise_behavior(struct vm_area_struct *vma, success: /* - * vm_flags is protected by the mmap_sem held in write mode. + * vm_flags is protected by the mmap_lock held in write mode. */ vma->vm_flags = new_flags; @@ -285,9 +285,9 @@ static long madvise_willneed(struct vm_area_struct *vma, * Filesystem's fadvise may need to take various locks. We need to * explicitly grab a reference because the vma (and hence the * vma's reference to the file) can go away as soon as we drop - * mmap_sem. + * mmap_lock. */ - *prev = NULL; /* tell sys_madvise we drop mmap_sem */ + *prev = NULL; /* tell sys_madvise we drop mmap_lock */ get_file(file); mmap_read_unlock(current->mm); offset = (loff_t)(start - vma->vm_start) @@ -768,7 +768,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma, return -EINVAL; if (!userfaultfd_remove(vma, start, end)) { - *prev = NULL; /* mmap_sem has been dropped, prev is stale */ + *prev = NULL; /* mmap_lock has been dropped, prev is stale */ mmap_read_lock(current->mm); vma = find_vma(current->mm, start); @@ -791,7 +791,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma, if (end > vma->vm_end) { /* * Don't fail if end > vma->vm_end. If the old - * vma was splitted while the mmap_sem was + * vma was splitted while the mmap_lock was * released the effect of the concurrent * operation may not cause madvise() to * have an undefined result. There may be an @@ -826,7 +826,7 @@ static long madvise_remove(struct vm_area_struct *vma, int error; struct file *f; - *prev = NULL; /* tell sys_madvise we drop mmap_sem */ + *prev = NULL; /* tell sys_madvise we drop mmap_lock */ if (vma->vm_flags & VM_LOCKED) return -EINVAL; @@ -847,11 +847,11 @@ static long madvise_remove(struct vm_area_struct *vma, * Filesystem's fallocate may need to take i_mutex. We need to * explicitly grab a reference because the vma (and hence the * vma's reference to the file) can go away as soon as we drop - * mmap_sem. + * mmap_lock. */ get_file(f); if (userfaultfd_remove(vma, start, end)) { - /* mmap_sem was not released by userfaultfd_remove() */ + /* mmap_lock was not released by userfaultfd_remove() */ mmap_read_unlock(current->mm); } error = vfs_fallocate(f, @@ -1153,7 +1153,7 @@ int do_madvise(unsigned long start, size_t len_in, int behavior) goto out; if (prev) vma = prev->vm_next; - else /* madvise_remove dropped mmap_sem */ + else /* madvise_remove dropped mmap_lock */ vma = find_vma(current->mm, start); } out: diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ffae92d4e472..0b38b6ad547d 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5901,7 +5901,7 @@ static void mem_cgroup_move_charge(void) retry: if (unlikely(!mmap_read_trylock(mc.mm))) { /* - * Someone who are holding the mmap_sem might be waiting in + * Someone who are holding the mmap_lock might be waiting in * waitq. So we cancel all extra charges, wake up all waiters, * and retry. Because we cancel precharges, we might not be able * to move enough charges, but moving charge is a best-effort diff --git a/mm/memory.c b/mm/memory.c index 4e2e17bb1281..dc7f3543b1fd 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1185,7 +1185,7 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb, * Here there can be other concurrent MADV_DONTNEED or * trans huge page faults running, and if the pmd is * none or trans huge it can change under us. This is - * because MADV_DONTNEED holds the mmap_sem in read + * because MADV_DONTNEED holds the mmap_lock in read * mode. */ if (pmd_none_or_trans_huge_or_clear_bad(pmd)) @@ -1636,7 +1636,7 @@ EXPORT_SYMBOL(vm_insert_pages); * The page does not need to be reserved. * * Usually this function is called from f_op->mmap() handler - * under mm->mmap_sem write-lock, so it can change vma->vm_flags. + * under mm->mmap_lock write-lock, so it can change vma->vm_flags. * Caller must set VM_MIXEDMAP on vma if it wants to call this * function from other places, for example from page-fault handler. * @@ -2573,7 +2573,7 @@ static vm_fault_t fault_dirty_shared_page(struct vm_fault *vmf) * mapping may be NULL here because some device drivers do not * set page.mapping but still dirty their pages * - * Drop the mmap_sem before waiting on IO, if we can. The file + * Drop the mmap_lock before waiting on IO, if we can. The file * is pinning the mapping, as per above. */ if ((dirtied || page_mkwrite) && mapping) { @@ -2623,7 +2623,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf) /* * Handle the case of a page which we actually need to copy to a new page. * - * Called with mmap_sem locked and the old page referenced, but + * Called with mmap_lock locked and the old page referenced, but * without the ptl held. * * High level logic flow: @@ -2887,9 +2887,9 @@ static vm_fault_t wp_page_shared(struct vm_fault *vmf) * change only once the write actually happens. This avoids a few races, * and potentially makes it more efficient. * - * We enter with non-exclusive mmap_sem (to exclude vma changes, + * We enter with non-exclusive mmap_lock (to exclude vma changes, * but allow concurrent faults), with pte both mapped and locked. - * We return with mmap_sem still held, but pte unmapped and unlocked. + * We return with mmap_lock still held, but pte unmapped and unlocked. */ static vm_fault_t do_wp_page(struct vm_fault *vmf) __releases(vmf->ptl) @@ -3078,11 +3078,11 @@ void unmap_mapping_range(struct address_space *mapping, EXPORT_SYMBOL(unmap_mapping_range); /* - * We enter with non-exclusive mmap_sem (to exclude vma changes, + * We enter with non-exclusive mmap_lock (to exclude vma changes, * but allow concurrent faults), and pte mapped but not yet locked. * We return with pte unmapped and unlocked. * - * We return with the mmap_sem locked or unlocked in the same cases + * We return with the mmap_lock locked or unlocked in the same cases * as does filemap_fault(). */ vm_fault_t do_swap_page(struct vm_fault *vmf) @@ -3303,9 +3303,9 @@ out_release: } /* - * We enter with non-exclusive mmap_sem (to exclude vma changes, + * We enter with non-exclusive mmap_lock (to exclude vma changes, * but allow concurrent faults), and pte mapped but not yet locked. - * We return with mmap_sem still held, but pte unmapped and unlocked. + * We return with mmap_lock still held, but pte unmapped and unlocked. */ static vm_fault_t do_anonymous_page(struct vm_fault *vmf) { @@ -3419,7 +3419,7 @@ oom: } /* - * The mmap_sem must have been held on entry, and may have been + * The mmap_lock must have been held on entry, and may have been * released depending on flags and vma->vm_ops->fault() return value. * See filemap_fault() and __lock_page_retry(). */ @@ -3928,11 +3928,11 @@ static vm_fault_t do_shared_fault(struct vm_fault *vmf) } /* - * We enter with non-exclusive mmap_sem (to exclude vma changes, + * We enter with non-exclusive mmap_lock (to exclude vma changes, * but allow concurrent faults). - * The mmap_sem may have been released depending on flags and our + * The mmap_lock may have been released depending on flags and our * return value. See filemap_fault() and __lock_page_or_retry(). - * If mmap_sem is released, vma may become invalid (for example + * If mmap_lock is released, vma may become invalid (for example * by other thread calling munmap()). */ static vm_fault_t do_fault(struct vm_fault *vmf) @@ -4161,10 +4161,10 @@ static vm_fault_t wp_huge_pud(struct vm_fault *vmf, pud_t orig_pud) * with external mmu caches can use to update those (ie the Sparc or * PowerPC hashed page tables that act as extended TLBs). * - * We enter with non-exclusive mmap_sem (to exclude vma changes, but allow + * We enter with non-exclusive mmap_lock (to exclude vma changes, but allow * concurrent faults). * - * The mmap_sem may have been released depending on flags and our return value. + * The mmap_lock may have been released depending on flags and our return value. * See filemap_fault() and __lock_page_or_retry(). */ static vm_fault_t handle_pte_fault(struct vm_fault *vmf) @@ -4186,7 +4186,7 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf) /* * A regular pmd is established and it can't morph into a huge * pmd from under us anymore at this point because we hold the - * mmap_sem read mode and khugepaged takes it in write mode. + * mmap_lock read mode and khugepaged takes it in write mode. * So now it's safe to run pte_offset_map(). */ vmf->pte = pte_offset_map(vmf->pmd, vmf->address); @@ -4254,7 +4254,7 @@ unlock: /* * By the time we get here, we already hold the mm semaphore * - * The mmap_sem may have been released depending on flags and our + * The mmap_lock may have been released depending on flags and our * return value. See filemap_fault() and __lock_page_or_retry(). */ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma, @@ -4349,7 +4349,7 @@ retry_pud: /* * By the time we get here, we already hold the mm semaphore * - * The mmap_sem may have been released depending on flags and our + * The mmap_lock may have been released depending on flags and our * return value. See filemap_fault() and __lock_page_or_retry(). */ vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address, @@ -4793,7 +4793,7 @@ void __might_fault(const char *file, int line) { /* * Some code (nfs/sunrpc) uses socket ops on kernel memory while - * holding the mmap_sem, this is safe because kernel memory doesn't + * holding the mmap_lock, this is safe because kernel memory doesn't * get paged out, therefore we'll never actually fault, and the * below annotations will generate false positives. */ diff --git a/mm/mempolicy.c b/mm/mempolicy.c index a38cd4cc3206..381320671677 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -224,7 +224,7 @@ static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes) * handle an empty nodemask with MPOL_PREFERRED here. * * Must be called holding task's alloc_lock to protect task's mems_allowed - * and mempolicy. May also be called holding the mmap_semaphore for write. + * and mempolicy. May also be called holding the mmap_lock for write. */ static int mpol_set_nodemask(struct mempolicy *pol, const nodemask_t *nodes, struct nodemask_scratch *nsc) @@ -368,7 +368,7 @@ static void mpol_rebind_preferred(struct mempolicy *pol, /* * mpol_rebind_policy - Migrate a policy to a different set of nodes * - * Per-vma policies are protected by mmap_sem. Allocations using per-task + * Per-vma policies are protected by mmap_lock. Allocations using per-task * policies are protected by task->mems_allowed_seq to prevent a premature * OOM/allocation failure due to parallel nodemask modification. */ @@ -398,7 +398,7 @@ void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new) /* * Rebind each vma in mm to new nodemask. * - * Call holding a reference to mm. Takes mm->mmap_sem during call. + * Call holding a reference to mm. Takes mm->mmap_lock during call. */ void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new) @@ -764,7 +764,7 @@ queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end, /* * Apply policy to a single VMA - * This must be called with the mmap_sem held for writing. + * This must be called with the mmap_lock held for writing. */ static int vma_replace_policy(struct vm_area_struct *vma, struct mempolicy *pol) @@ -789,7 +789,7 @@ static int vma_replace_policy(struct vm_area_struct *vma, } old = vma->vm_policy; - vma->vm_policy = new; /* protected by mmap_sem */ + vma->vm_policy = new; /* protected by mmap_lock */ mpol_put(old); return 0; @@ -985,7 +985,7 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask, if (flags & MPOL_F_ADDR) { /* * Take a refcount on the mpol, lookup_node() - * wil drop the mmap_sem, so after calling + * wil drop the mmap_lock, so after calling * lookup_node() only "pol" remains valid, "vma" * is stale. */ diff --git a/mm/migrate.c b/mm/migrate.c index f69b09e0829c..f37729673558 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2120,7 +2120,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, * pmd before doing set_pmd_at(), nor to flush the TLB after * set_pmd_at(). Clearing the pmd here would introduce a race * condition against MADV_DONTNEED, because MADV_DONTNEED only holds the - * mmap_sem for reading. If the pmd is set to NULL at any given time, + * mmap_lock for reading. If the pmd is set to NULL at any given time, * MADV_DONTNEED won't wait on the pmd lock and it'll skip clearing this * pmd. */ @@ -2675,7 +2675,7 @@ restore: * have the MIGRATE_PFN_MIGRATE flag set for their src array entry. * * It is safe to update device page table after migrate_vma_pages() because - * both destination and source page are still locked, and the mmap_sem is held + * both destination and source page are still locked, and the mmap_lock is held * in read mode (hence no one can unmap the range being migrated). * * Once the caller is done cleaning up things and updating its page table (if it diff --git a/mm/mlock.c b/mm/mlock.c index c5d806917526..f8736136fad7 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -49,7 +49,7 @@ EXPORT_SYMBOL(can_do_mlock); * When lazy mlocking via vmscan, it is important to ensure that the * vma's VM_LOCKED status is not concurrently being modified, otherwise we * may have mlocked a page that is being munlocked. So lazy mlock must take - * the mmap_sem for read, and verify that the vma really is locked + * the mmap_lock for read, and verify that the vma really is locked * (see mm/rmap.c). */ @@ -381,7 +381,7 @@ static unsigned long __munlock_pagevec_fill(struct pagevec *pvec, /* * Initialize pte walk starting at the already pinned page where we * are sure that there is a pte, as it was pinned under the same - * mmap_sem write op. + * mmap_lock write op. */ pte = get_locked_pte(vma->vm_mm, start, &ptl); /* Make sure we do not cross the page table boundary */ @@ -565,7 +565,7 @@ success: mm->locked_vm += nr_pages; /* - * vm_flags is protected by the mmap_sem held in write mode. + * vm_flags is protected by the mmap_lock held in write mode. * It's okay if try_to_unmap_one unmaps a page just after we * set VM_LOCKED, populate_vma_page_range will bring it back. */ diff --git a/mm/mmap.c b/mm/mmap.c index 79005049fbfc..59a4682ebf3f 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -132,7 +132,7 @@ void vma_set_page_prot(struct vm_area_struct *vma) vm_flags &= ~VM_SHARED; vm_page_prot = vm_pgprot_modify(vm_page_prot, vm_flags); } - /* remove_protection_ptes reads vma->vm_page_prot without mmap_sem */ + /* remove_protection_ptes reads vma->vm_page_prot without mmap_lock */ WRITE_ONCE(vma->vm_page_prot, vm_page_prot); } @@ -238,14 +238,14 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) /* * Always allow shrinking brk. - * __do_munmap() may downgrade mmap_sem to read. + * __do_munmap() may downgrade mmap_lock to read. */ if (brk <= mm->brk) { int ret; /* - * mm->brk must to be protected by write mmap_sem so update it - * before downgrading mmap_sem. When __do_munmap() fails, + * mm->brk must to be protected by write mmap_lock so update it + * before downgrading mmap_lock. When __do_munmap() fails, * mm->brk will be restored from origbrk. */ mm->brk = brk; @@ -505,7 +505,7 @@ static __always_inline void vma_rb_erase(struct vm_area_struct *vma, * After the update, the vma will be reinserted using * anon_vma_interval_tree_post_update_vma(). * - * The entire update must be protected by exclusive mmap_sem and by + * The entire update must be protected by exclusive mmap_lock and by * the root anon_vma's mutex. */ static inline void @@ -2371,7 +2371,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) /* * vma->vm_start/vm_end cannot change under us because the caller - * is required to hold the mmap_sem in read mode. We need the + * is required to hold the mmap_lock in read mode. We need the * anon_vma lock to serialize against concurrent expand_stacks. */ anon_vma_lock_write(vma->anon_vma); @@ -2389,7 +2389,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) if (!error) { /* * vma_gap_update() doesn't support concurrent - * updates, but we only hold a shared mmap_sem + * updates, but we only hold a shared mmap_lock * lock here, so we need to protect against * concurrent vma expansions. * anon_vma_lock_write() doesn't help here, as @@ -2451,7 +2451,7 @@ int expand_downwards(struct vm_area_struct *vma, /* * vma->vm_start/vm_end cannot change under us because the caller - * is required to hold the mmap_sem in read mode. We need the + * is required to hold the mmap_lock in read mode. We need the * anon_vma lock to serialize against concurrent expand_stacks. */ anon_vma_lock_write(vma->anon_vma); @@ -2469,7 +2469,7 @@ int expand_downwards(struct vm_area_struct *vma, if (!error) { /* * vma_gap_update() doesn't support concurrent - * updates, but we only hold a shared mmap_sem + * updates, but we only hold a shared mmap_lock * lock here, so we need to protect against * concurrent vma expansions. * anon_vma_lock_write() doesn't help here, as @@ -2855,7 +2855,7 @@ static int __vm_munmap(unsigned long start, size_t len, bool downgrade) ret = __do_munmap(mm, start, len, &uf, downgrade); /* - * Returning 1 indicates mmap_sem is downgraded. + * Returning 1 indicates mmap_lock is downgraded. * But 1 is not legal return value of vm_munmap() and munmap(), reset * it to 0 before return. */ @@ -3107,12 +3107,12 @@ void exit_mmap(struct mm_struct *mm) /* * Manually reap the mm to free as much memory as possible. * Then, as the oom reaper does, set MMF_OOM_SKIP to disregard - * this mm from further consideration. Taking mm->mmap_sem for + * this mm from further consideration. Taking mm->mmap_lock for * write after setting MMF_OOM_SKIP will guarantee that the oom - * reaper will not run on this mm again after mmap_sem is + * reaper will not run on this mm again after mmap_lock is * dropped. * - * Nothing can be holding mm->mmap_sem here and the above call + * Nothing can be holding mm->mmap_lock here and the above call * to mmu_notifier_release(mm) ensures mmu notifier callbacks in * __oom_reap_task_mm() will not block. * @@ -3437,7 +3437,7 @@ bool vma_is_special_mapping(const struct vm_area_struct *vma, } /* - * Called with mm->mmap_sem held for writing. + * Called with mm->mmap_lock held for writing. * Insert a new vma covering the given region, with the given flags. * Its pages are supplied by the given array of struct page *. * The array can be shorter than len >> PAGE_SHIFT if it's null-terminated. @@ -3513,11 +3513,11 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping) * operations that could ever happen on a certain mm. This includes * vmtruncate, try_to_unmap, and all page faults. * - * The caller must take the mmap_sem in write mode before calling + * The caller must take the mmap_lock in write mode before calling * mm_take_all_locks(). The caller isn't allowed to release the - * mmap_sem until mm_drop_all_locks() returns. + * mmap_lock until mm_drop_all_locks() returns. * - * mmap_sem in write mode is required in order to block all operations + * mmap_lock in write mode is required in order to block all operations * that could modify pagetables and free pages without need of * altering the vma layout. It's also needed in write mode to avoid new * anon_vmas to be associated with existing vmas. @@ -3622,7 +3622,7 @@ static void vm_unlock_mapping(struct address_space *mapping) } /* - * The mmap_sem cannot be released by the caller until + * The mmap_lock cannot be released by the caller until * mm_drop_all_locks() returns. */ void mm_drop_all_locks(struct mm_struct *mm) diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c index a3538cb2bcbe..03c33c93a582 100644 --- a/mm/mmu_gather.c +++ b/mm/mmu_gather.c @@ -301,7 +301,7 @@ void tlb_finish_mmu(struct mmu_gather *tlb, { /* * If there are parallel threads are doing PTE changes on same range - * under non-exclusive lock (e.g., mmap_sem read-side) but defer TLB + * under non-exclusive lock (e.g., mmap_lock read-side) but defer TLB * flush by batching, one thread may end up seeing inconsistent PTEs * and result in having stale TLB entries. So flush TLB forcefully * if we detect parallel PTE batching threads. diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index 2f348b6c9c9a..352bb9f3ecc0 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -599,7 +599,7 @@ void __mmu_notifier_invalidate_range(struct mm_struct *mm, } /* - * Same as mmu_notifier_register but here the caller must hold the mmap_sem in + * Same as mmu_notifier_register but here the caller must hold the mmap_lock in * write mode. A NULL mn signals the notifier is being registered for itree * mode. */ @@ -623,7 +623,7 @@ int __mmu_notifier_register(struct mmu_notifier *subscription, /* * kmalloc cannot be called under mm_take_all_locks(), but we * know that mm->notifier_subscriptions can't change while we - * hold the write side of the mmap_sem. + * hold the write side of the mmap_lock. */ subscriptions = kzalloc( sizeof(struct mmu_notifier_subscriptions), GFP_KERNEL); @@ -655,7 +655,7 @@ int __mmu_notifier_register(struct mmu_notifier *subscription, * readers. acquire can only be used while holding the mmgrab or * mmget, and is safe because once created the * mmu_notifier_subscriptions is not freed until the mm is destroyed. - * As above, users holding the mmap_sem or one of the + * As above, users holding the mmap_lock or one of the * mm_take_all_locks() do not need to use acquire semantics. */ if (subscriptions) @@ -689,7 +689,7 @@ EXPORT_SYMBOL_GPL(__mmu_notifier_register); * @mn: The notifier to attach * @mm: The mm to attach the notifier to * - * Must not hold mmap_sem nor any other VM related lock when calling + * Must not hold mmap_lock nor any other VM related lock when calling * this registration function. Must also ensure mm_users can't go down * to zero while this runs to avoid races with mmu_notifier_release, * so mm has to be current->mm or the mm should be pinned safely such @@ -750,7 +750,7 @@ find_get_mmu_notifier(struct mm_struct *mm, const struct mmu_notifier_ops *ops) * are the same. * * Each call to mmu_notifier_get() must be paired with a call to - * mmu_notifier_put(). The caller must hold the write side of mm->mmap_sem. + * mmu_notifier_put(). The caller must hold the write side of mm->mmap_lock. * * While the caller has a mmu_notifier get the mm pointer will remain valid, * and can be converted to an active mm pointer via mmget_not_zero(). diff --git a/mm/mprotect.c b/mm/mprotect.c index ee27e44a7e07..ce8b8a5eacbb 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -49,7 +49,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, bool uffd_wp_resolve = cp_flags & MM_CP_UFFD_WP_RESOLVE; /* - * Can be called with only the mmap_sem for reading by + * Can be called with only the mmap_lock for reading by * prot_numa so we must check the pmd isn't constantly * changing from under us from pmd_none to pmd_trans_huge * and/or the other way around. @@ -59,7 +59,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, /* * The pmd points to a regular pte so the pmd can't change - * from under us even if the mmap_sem is only hold for + * from under us even if the mmap_lock is only hold for * reading. */ pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); @@ -228,7 +228,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, next = pmd_addr_end(addr, end); /* - * Automatic NUMA balancing walks the tables with mmap_sem + * Automatic NUMA balancing walks the tables with mmap_lock * held for read. It's possible a parallel update to occur * between pmd_trans_huge() and a pmd_none_or_clear_bad() * check leading to a false positive and clearing. @@ -477,7 +477,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev, success: /* - * vm_flags and vm_page_prot are protected by the mmap_sem + * vm_flags and vm_page_prot are protected by the mmap_lock * held in write mode. */ vma->vm_flags = newflags; diff --git a/mm/mremap.c b/mm/mremap.c index 0a2f0efd2939..5dd572d57ca9 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -146,7 +146,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, /* * We don't have to worry about the ordering of src and dst - * pte locks because exclusive mmap_sem prevents deadlock. + * pte locks because exclusive mmap_lock prevents deadlock. */ old_pte = pte_offset_map_lock(mm, old_pmd, old_addr, &old_ptl); new_pte = pte_offset_map(new_pmd, new_addr); @@ -213,7 +213,7 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, /* * We don't have to worry about the ordering of src and dst - * ptlocks because exclusive mmap_sem prevents deadlock. + * ptlocks because exclusive mmap_lock prevents deadlock. */ old_ptl = pmd_lock(vma->vm_mm, old_pmd); new_ptl = pmd_lockptr(mm, new_pmd); @@ -710,7 +710,7 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len, * Always allow a shrinking remap: that just unmaps * the unnecessary pages.. * __do_munmap does all the needed commit accounting, and - * downgrades mmap_sem to read if so directed. + * downgrades mmap_lock to read if so directed. */ if (old_len >= new_len) { int retval; @@ -720,7 +720,7 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len, if (retval < 0 && old_len != new_len) { ret = retval; goto out; - /* Returning 1 indicates mmap_sem is downgraded to read. */ + /* Returning 1 indicates mmap_lock is downgraded to read. */ } else if (retval == 1) downgraded = true; ret = addr; diff --git a/mm/nommu.c b/mm/nommu.c index 8c3a04784dbe..cdcad5d61dd1 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -582,7 +582,7 @@ static void put_nommu_region(struct vm_region *region) * add a VMA into a process's mm_struct in the appropriate place in the list * and tree and add to the address space's page tree also if not an anonymous * page - * - should be called with mm->mmap_sem held writelocked + * - should be called with mm->mmap_lock held writelocked */ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma) { @@ -696,7 +696,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma) /* * look up the first VMA in which addr resides, NULL if none - * - should be called with mm->mmap_sem at least held readlocked + * - should be called with mm->mmap_lock at least held readlocked */ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) { @@ -742,7 +742,7 @@ int expand_stack(struct vm_area_struct *vma, unsigned long address) /* * look up the first VMA exactly that exactly matches addr - * - should be called with mm->mmap_sem at least held readlocked + * - should be called with mm->mmap_lock at least held readlocked */ static struct vm_area_struct *find_vma_exact(struct mm_struct *mm, unsigned long addr, diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 3b5d78dfebe9..b4e9491cb320 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -898,7 +898,7 @@ static void __oom_kill_process(struct task_struct *victim, const char *message) /* * Kill all user processes sharing victim->mm in other thread groups, if * any. They don't get access to memory reserves, though, to avoid - * depletion of all memory. This prevents mm->mmap_sem livelock when an + * depletion of all memory. This prevents mm->mmap_lock livelock when an * oom killed thread cannot exit because it requires the semaphore and * its contended by another thread trying to allocate memory itself. * That thread will now get access to memory reserves since it has a diff --git a/mm/pagewalk.c b/mm/pagewalk.c index 3b452aa05cd0..e81640d9f177 100644 --- a/mm/pagewalk.c +++ b/mm/pagewalk.c @@ -373,7 +373,7 @@ static int __walk_page_range(unsigned long start, unsigned long end, * caller-specific data to callbacks, @private should be helpful. * * Locking: - * Callers of walk_page_range() and walk_page_vma() should hold @mm->mmap_sem, + * Callers of walk_page_range() and walk_page_vma() should hold @mm->mmap_lock, * because these function traverse vma list and/or access to vma's data. */ int walk_page_range(struct mm_struct *mm, unsigned long start, @@ -498,11 +498,11 @@ int walk_page_vma(struct vm_area_struct *vma, const struct mm_walk_ops *ops, * Also see walk_page_range() for additional information. * * Locking: - * This function can't require that the struct mm_struct::mmap_sem is held, + * This function can't require that the struct mm_struct::mmap_lock is held, * since @mapping may be mapped by multiple processes. Instead * @mapping->i_mmap_rwsem must be held. This might have implications in the * callbacks, and it's up tho the caller to ensure that the - * struct mm_struct::mmap_sem is not needed. + * struct mm_struct::mmap_lock is not needed. * * Also this means that a caller can't rely on the struct * vm_area_struct::vm_flags to be constant across a call, diff --git a/mm/rmap.c b/mm/rmap.c index ad4a0fdcc94c..5fe2dedce1fc 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -21,7 +21,7 @@ * Lock ordering in mm: * * inode->i_mutex (while writing or truncating, not reading or faulting) - * mm->mmap_sem + * mm->mmap_lock * page->flags PG_locked (lock_page) * (see huegtlbfs below) * hugetlbfs_i_mmap_rwsem_key (in huge_pmd_share) * mapping->i_mmap_rwsem @@ -177,7 +177,7 @@ static void anon_vma_chain_link(struct vm_area_struct *vma, * to do any locking for the common case of already having * an anon_vma. * - * This must be called with the mmap_sem held for reading. + * This must be called with the mmap_lock held for reading. */ int __anon_vma_prepare(struct vm_area_struct *vma) { @@ -1444,7 +1444,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma, if (!PageTransCompound(page)) { /* * Holding pte lock, we do *not* need - * mmap_sem here + * mmap_lock here */ mlock_vma_page(page); } @@ -1817,7 +1817,7 @@ static struct anon_vma *rmap_walk_anon_lock(struct page *page, /* * Note: remove_migration_ptes() cannot use page_lock_anon_vma_read() * because that depends on page_mapped(); but not all its usages - * are holding mmap_sem. Users without mmap_sem are required to + * are holding mmap_lock. Users without mmap_lock are required to * take a reference count to prevent the anon_vma disappearing */ anon_vma = page_anon_vma(page); @@ -1837,7 +1837,7 @@ static struct anon_vma *rmap_walk_anon_lock(struct page *page, * Find all the mappings of a page using the mapping pointer and the vma chains * contained in the anon_vma struct it points to. * - * When called from try_to_munlock(), the mmap_sem of the mm containing the vma + * When called from try_to_munlock(), the mmap_lock of the mm containing the vma * where the page was found will be held for write. So, we won't recheck * vm_flags for that VMA. That should be OK, because that vma shouldn't be * LOCKED. @@ -1889,7 +1889,7 @@ static void rmap_walk_anon(struct page *page, struct rmap_walk_control *rwc, * Find all the mappings of a page using the mapping pointer and the vma chains * contained in the address_space struct it points to. * - * When called from try_to_munlock(), the mmap_sem of the mm containing the vma + * When called from try_to_munlock(), the mmap_lock of the mm containing the vma * where the page was found will be held for write. So, we won't recheck * vm_flags for that VMA. That should be OK, because that vma shouldn't be * LOCKED. diff --git a/mm/shmem.c b/mm/shmem.c index 207fa263a410..a0dbe62f8042 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2319,7 +2319,7 @@ static int shmem_mfill_atomic_pte(struct mm_struct *dst_mm, PAGE_SIZE); kunmap_atomic(page_kaddr); - /* fallback to copy_from_user outside mmap_sem */ + /* fallback to copy_from_user outside mmap_lock */ if (unlikely(ret)) { *pagep = page; shmem_inode_unacct_blocks(inode, 1); @@ -4136,7 +4136,7 @@ int shmem_zero_setup(struct vm_area_struct *vma) loff_t size = vma->vm_end - vma->vm_start; /* - * Cloning a new file under mmap_sem leads to a lock ordering conflict + * Cloning a new file under mmap_lock leads to a lock ordering conflict * between XFS directory reading and selinux: since this file is only * accessible to the user through its mapping, use S_PRIVATE flag to * bypass file security, in the same way as shmem_kernel_file_setup(). diff --git a/mm/swap_state.c b/mm/swap_state.c index 516e29d768c6..e98ff460e9e9 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -552,7 +552,7 @@ static unsigned long swapin_nr_pages(unsigned long offset) * This has been extended to use the NUMA policies from the mm triggering * the readahead. * - * Caller must hold read mmap_sem if vmf->vma is not NULL. + * Caller must hold read mmap_lock if vmf->vma is not NULL. */ struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask, struct vm_fault *vmf) @@ -734,7 +734,7 @@ static void swap_ra_info(struct vm_fault *vmf, * Primitive swap readahead code. We simply read in a few pages whoes * virtual addresses are around the fault address in the same vma. * - * Caller must hold read mmap_sem if vmf->vma is not NULL. + * Caller must hold read mmap_lock if vmf->vma is not NULL. * */ static struct page *swap_vma_readahead(swp_entry_t fentry, gfp_t gfp_mask, diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 691613c5db9f..b80419320c7d 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -76,7 +76,7 @@ static int mcopy_atomic_pte(struct mm_struct *dst_mm, PAGE_SIZE); kunmap_atomic(page_kaddr); - /* fallback to copy_from_user outside mmap_sem */ + /* fallback to copy_from_user outside mmap_lock */ if (unlikely(ret)) { ret = -ENOENT; *pagep = page; @@ -200,7 +200,7 @@ static pmd_t *mm_alloc_pmd(struct mm_struct *mm, unsigned long address) #ifdef CONFIG_HUGETLB_PAGE /* * __mcopy_atomic processing for HUGETLB vmas. Note that this routine is - * called with mmap_sem held, it will release mmap_sem before returning. + * called with mmap_lock held, it will release mmap_lock before returning. */ static __always_inline ssize_t __mcopy_atomic_hugetlb(struct mm_struct *dst_mm, struct vm_area_struct *dst_vma, @@ -247,7 +247,7 @@ static __always_inline ssize_t __mcopy_atomic_hugetlb(struct mm_struct *dst_mm, retry: /* - * On routine entry dst_vma is set. If we had to drop mmap_sem and + * On routine entry dst_vma is set. If we had to drop mmap_lock and * retry, dst_vma will be set to NULL and we must lookup again. */ if (!dst_vma) { @@ -357,7 +357,7 @@ out: * private and shared mappings. See the routine * restore_reserve_on_error for details. Unfortunately, we * can not call restore_reserve_on_error now as it would - * require holding mmap_sem. + * require holding mmap_lock. * * If a reservation for the page existed in the reservation * map of a private mapping, the map was modified to indicate diff --git a/mm/util.c b/mm/util.c index 09f62d7d6e3e..c63c8e47be57 100644 --- a/mm/util.c +++ b/mm/util.c @@ -425,7 +425,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) * @bypass_rlim: %true if checking RLIMIT_MEMLOCK should be skipped * * Assumes @task and @mm are valid (i.e. at least one reference on each), and - * that mmap_sem is held as writer. + * that mmap_lock is held as writer. * * Return: * * 0 on success |