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vfs: move ACL cache lookup into generic code

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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 <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Linus Torvalds 2011-07-22 19:30:19 -07:00 • committed by Al Viro
commit e77819e57f
12 changed files with 65 additions and 69 deletions
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3
fs/jfs/acl.c
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@ -118,9 +118,6 @@ int jfs_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);