From 3bfa784a6539f91a27d7ffdd408efdb638e3bebd Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 19 Jun 2011 12:55:10 -0400 Subject: kill file_permission() completely convert the last remaining caller to inode_permission() Signed-off-by: Al Viro --- kernel/cgroup.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'kernel') diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 2731d115d725..e1c72c0f512b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3542,7 +3542,8 @@ static int cgroup_write_event_control(struct cgroup *cgrp, struct cftype *cft, } /* the process need read permission on control file */ - ret = file_permission(cfile, MAY_READ); + /* AV: shouldn't we check that it's been opened for read instead? */ + ret = inode_permission(cfile->f_path.dentry->d_inode, MAY_READ); if (ret < 0) goto fail; -- cgit v1.2.3-58-ga151 From 6657719390cd05be45f4e3b501d8bb46889c0a19 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 28 Jun 2011 15:41:10 -0400 Subject: make sure that nsproxy_cache is initialized early enough Signed-off-by: Al Viro --- include/linux/nsproxy.h | 1 + kernel/fork.c | 1 + kernel/nsproxy.c | 4 +--- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'kernel') diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h index 50d20aba57d3..cc37a55ad004 100644 --- a/include/linux/nsproxy.h +++ b/include/linux/nsproxy.h @@ -68,6 +68,7 @@ void switch_task_namespaces(struct task_struct *tsk, struct nsproxy *new); void free_nsproxy(struct nsproxy *ns); int unshare_nsproxy_namespaces(unsigned long, struct nsproxy **, struct fs_struct *); +int __init nsproxy_cache_init(void); static inline void put_nsproxy(struct nsproxy *ns) { diff --git a/kernel/fork.c b/kernel/fork.c index 0276c30401a0..31fa13e63b70 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1574,6 +1574,7 @@ void __init proc_caches_init(void) SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_NOTRACK, NULL); vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC); mmap_init(); + nsproxy_cache_init(); } /* diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index d6a00f3de15d..9aeab4b98c64 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -271,10 +271,8 @@ out: return err; } -static int __init nsproxy_cache_init(void) +int __init nsproxy_cache_init(void) { nsproxy_cachep = KMEM_CACHE(nsproxy, SLAB_PANIC); return 0; } - -module_init(nsproxy_cache_init); -- cgit v1.2.3-58-ga151 From 11b80f459adaf91a712f95e7734a17655a36bf30 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 24 Jun 2011 14:29:44 -0400 Subject: rw_semaphore: remove up/down_read_non_owner Now that the last users is gone these can be removed. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- include/linux/rwsem.h | 10 ---------- kernel/rwsem.c | 16 ---------------- 2 files changed, 26 deletions(-) (limited to 'kernel') diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h index a8afe9cd000c..77950dfa0a9e 100644 --- a/include/linux/rwsem.h +++ b/include/linux/rwsem.h @@ -124,19 +124,9 @@ extern void downgrade_write(struct rw_semaphore *sem); */ extern void down_read_nested(struct rw_semaphore *sem, int subclass); extern void down_write_nested(struct rw_semaphore *sem, int subclass); -/* - * Take/release a lock when not the owner will release it. - * - * [ This API should be avoided as much as possible - the - * proper abstraction for this case is completions. ] - */ -extern void down_read_non_owner(struct rw_semaphore *sem); -extern void up_read_non_owner(struct rw_semaphore *sem); #else # define down_read_nested(sem, subclass) down_read(sem) # define down_write_nested(sem, subclass) down_write(sem) -# define down_read_non_owner(sem) down_read(sem) -# define up_read_non_owner(sem) up_read(sem) #endif #endif /* _LINUX_RWSEM_H */ diff --git a/kernel/rwsem.c b/kernel/rwsem.c index cae050b05f5e..176e5e56ffab 100644 --- a/kernel/rwsem.c +++ b/kernel/rwsem.c @@ -117,15 +117,6 @@ void down_read_nested(struct rw_semaphore *sem, int subclass) EXPORT_SYMBOL(down_read_nested); -void down_read_non_owner(struct rw_semaphore *sem) -{ - might_sleep(); - - __down_read(sem); -} - -EXPORT_SYMBOL(down_read_non_owner); - void down_write_nested(struct rw_semaphore *sem, int subclass) { might_sleep(); @@ -136,13 +127,6 @@ void down_write_nested(struct rw_semaphore *sem, int subclass) EXPORT_SYMBOL(down_write_nested); -void up_read_non_owner(struct rw_semaphore *sem) -{ - __up_read(sem); -} - -EXPORT_SYMBOL(up_read_non_owner); - #endif -- cgit v1.2.3-58-ga151