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Diffstat (limited to 'mm/hmm.c')
-rw-r--r--mm/hmm.c18
1 files changed, 3 insertions, 15 deletions
diff --git a/mm/hmm.c b/mm/hmm.c
index 660e8db44811..9b6a8a26a1fa 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -77,17 +77,14 @@ static int hmm_vma_fault(unsigned long addr, unsigned long end,
unsigned int required_fault, struct mm_walk *walk)
{
struct hmm_vma_walk *hmm_vma_walk = walk->private;
- struct hmm_range *range = hmm_vma_walk->range;
struct vm_area_struct *vma = walk->vma;
- uint64_t *pfns = range->pfns;
- unsigned long i = (addr - range->start) >> PAGE_SHIFT;
unsigned int fault_flags = FAULT_FLAG_REMOTE;
WARN_ON_ONCE(!required_fault);
hmm_vma_walk->last = addr;
if (!vma)
- goto out_error;
+ return -EFAULT;
if (required_fault & HMM_NEED_WRITE_FAULT) {
if (!(vma->vm_flags & VM_WRITE))
@@ -95,15 +92,10 @@ static int hmm_vma_fault(unsigned long addr, unsigned long end,
fault_flags |= FAULT_FLAG_WRITE;
}
- for (; addr < end; addr += PAGE_SIZE, i++)
+ for (; addr < end; addr += PAGE_SIZE)
if (handle_mm_fault(vma, addr, fault_flags) & VM_FAULT_ERROR)
- goto out_error;
-
+ return -EFAULT;
return -EBUSY;
-
-out_error:
- pfns[i] = range->values[HMM_PFN_ERROR];
- return -EFAULT;
}
static unsigned int hmm_pte_need_fault(const struct hmm_vma_walk *hmm_vma_walk,
@@ -292,7 +284,6 @@ static int hmm_vma_handle_pte(struct mm_walk *walk, unsigned long addr,
/* Report error for everything else */
pte_unmap(ptep);
- *pfn = range->values[HMM_PFN_ERROR];
return -EFAULT;
}
@@ -578,9 +569,6 @@ static const struct mm_walk_ops hmm_walk_ops = {
*
* This is similar to get_user_pages(), except that it can read the page tables
* without mutating them (ie causing faults).
- *
- * On error, for one virtual address in the range, the function will mark the
- * corresponding HMM pfn entry with an error flag.
*/
long hmm_range_fault(struct hmm_range *range)
{