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authorDipankar Sarma <dipankar@in.ibm.com>2005-09-09 13:04:14 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 13:57:55 -0700
commitb835996f628eadb55c5fb222ba46fe9395bf73c7 (patch)
treed63d80585d197e1ffc299af4a0034049790fb197 /security
parentab2af1f5005069321c5d130f09cce577b03f43ef (diff)
downloadlinux-linaro-stable-b835996f628eadb55c5fb222ba46fe9395bf73c7.tar.gz
[PATCH] files: lock-free fd look-up
With the use of RCU in files structure, the look-up of files using fds can now be lock-free. The lookup is protected by rcu_read_lock()/rcu_read_unlock(). This patch changes the readers to use lock-free lookup. Signed-off-by: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Ravikiran Thirumalai <kiran_th@gmail.com> Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index acb5a495a902..f40c8221ec1b 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1652,7 +1652,7 @@ static inline void flush_unauthorized_files(struct files_struct * files)
continue;
}
if (devnull) {
- atomic_inc(&devnull->f_count);
+ rcuref_inc(&devnull->f_count);
} else {
devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
if (!devnull) {