[PATCH v2 1/5] ext2: cache NULL when both default_acl and acl are NULL

default_acl and acl of newly created inode will be initiated
as ACL_NOT_CACHED in vfs function inode_init_always() and later
will be updated by calling xxx_init_acl() in specific filesystems.
Howerver, when default_acl and acl are NULL then they keep the value
of ACL_NOT_CACHED, this patch tries to cache NULL for acl/default_acl
in this case.

Signed-off-by: Chengguang Xu <[email protected]>
---
v1->v2:
- Coding style change.

 fs/ext2/acl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 224c04abb2e5..cf4c77f8dd08 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -256,11 +256,15 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
 	if (default_acl) {
 		error = __ext2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
 		posix_acl_release(default_acl);
+	} else {
+		inode->i_default_acl = NULL;
 	}
 	if (acl) {
 		if (!error)
 			error = __ext2_set_acl(inode, acl, ACL_TYPE_ACCESS);
 		posix_acl_release(acl);
+	} else {
+		inode->i_acl = NULL;
 	}
 	return error;
 }
-- 
2.17.1


------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot