vfs: move ACL cache lookup into generic code

This moves logic for checking the cached ACL values from low-level
filesystems into generic code.  The end result is a streamlined ACL
check that doesn't need to load the inode->i_op->check_acl pointer at
all for the common cached case.

The filesystems also don't need to check for a non-blocking RCU walk
case in their acl_check() functions, because that is all handled at a
VFS layer.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 3 deletions

diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index f4cf451ce6e8..aff23e59b58c 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -297,9 +297,6 @@ int ocfs2_check_acl(struct inode *inode, int mask)
         struct posix_acl *acl;
         int ret = -EAGAIN;
 
-        if (mask & MAY_NOT_BLOCK)
-                return -ECHILD;
-
         osb = OCFS2_SB(inode->i_sb);
         if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
                 return ret;