fs: xfs: libxfs: constify xfs_nameops structures

Source kernel commit: cf7841c12d85d1fe0ad33fb8bc5746809a882010

Declare the structure xfs_nameops as const as it is only stored in the
m_dirnameops field of a xfs_mount structure. This field is of type
const struct xfs_nameops *, so xfs_nameops structures having this
property can be declared as const.
Done using Coccinelle:
@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct xfs_nameops i@p = {...};

@ok1@
identifier r1.i;
position p;
struct xfs_mount mp;
@@
mp.m_dirnameops=&i@p

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct xfs_nameops i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct xfs_nameops i;

File size before:
text	   data	    bss	    dec	    hex	filename
5302	     85	      0	   5387	   150b	fs/xfs/libxfs/xfs_dir2.o

File size after:
text	   data	    bss	    dec	    hex	filename
5318	     69	      0	   5387	   150b	fs/xfs/libxfs/xfs_dir2.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_dir2.c b/libxfs/xfs_dir2.c
index 4180a930001ceebe7d351f05ed7d981cb5129505..5740d07aa4b79091fe615586693a707620b5a8f6 100644 (file)
--- a/libxfs/xfs_dir2.c
+++ b/libxfs/xfs_dir2.c
@@ -91,7 +91,7 @@ xfs_ascii_ci_compname(
        return result;
 }
 
-static struct xfs_nameops xfs_ascii_ci_nameops = {
+static const struct xfs_nameops xfs_ascii_ci_nameops = {
        .hashname       = xfs_ascii_ci_hashname,
        .compname       = xfs_ascii_ci_compname,
 };