Btrfs: make acl functions really no-op if acl is not enabled

So there's no overhead for something we don't use.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

3 files changed, 15 insertions, 21 deletions

diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 9b72dcf1cd25..40e6ac08c21f 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -6,5 +6,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
            transaction.o inode.o file.o tree-defrag.o \
            extent_map.o sysfs.o struct-funcs.o xattr.o ordered-data.o \
            extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \
-           export.o tree-log.o acl.o free-space-cache.o zlib.o lzo.o \
+           export.o tree-log.o free-space-cache.o zlib.o lzo.o \
            compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o
+
+btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index f66fc9959733..b206d4c2720b 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -28,8 +28,6 @@
 #include "btrfs_inode.h"
 #include "xattr.h"
 
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
-
 static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
 {
         int size;
@@ -318,18 +316,3 @@ const struct xattr_handler btrfs_xattr_acl_access_handler = {
         .get    = btrfs_xattr_acl_get,
         .set    = btrfs_xattr_acl_set,
 };
-
-#else /* CONFIG_BTRFS_FS_POSIX_ACL */
-
-int btrfs_acl_chmod(struct inode *inode)
-{
-        return 0;
-}
-
-int btrfs_init_acl(struct btrfs_trans_handle *trans,
-                   struct inode *inode, struct inode *dir)
-{
-        return 0;
-}
-
-#endif /* CONFIG_BTRFS_FS_POSIX_ACL */
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 34ce4140bb41..a6263bdab818 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2650,12 +2650,21 @@ do {								\
 /* acl.c */
 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
-#else
-#define btrfs_check_acl NULL
-#endif
 int btrfs_init_acl(struct btrfs_trans_handle *trans,
                    struct inode *inode, struct inode *dir);
 int btrfs_acl_chmod(struct inode *inode);
+#else
+#define btrfs_check_acl NULL
+static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
+                                 struct inode *inode, struct inode *dir)
+{
+        return 0;
+}
+static inline int btrfs_acl_chmod(struct inode *inode)
+{
+        return 0;
+}
+#endif
 
 /* relocation.c */
 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);