[XFS] clean up xfs_start_flags

xfs_start_flags can make use of is_power_of_2 to tidy up the test a little
bit.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29327a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 11f5ea29a038..47c890778bb6 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -238,11 +238,9 @@ xfs_start_flags(
         mp->m_logbufs = ap->logbufs;
         if (ap->logbufsize != -1 &&
             ap->logbufsize !=  0 &&
-            ap->logbufsize != 16 * 1024 &&
-            ap->logbufsize != 32 * 1024 &&
-            ap->logbufsize != 64 * 1024 &&
-            ap->logbufsize != 128 * 1024 &&
-            ap->logbufsize != 256 * 1024) {
+            (ap->logbufsize < XLOG_MIN_RECORD_BSIZE ||
+             ap->logbufsize > XLOG_MAX_RECORD_BSIZE ||
+             !is_power_of_2(ap->logbufsize))) {
                 cmn_err(CE_WARN,
         "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
                         ap->logbufsize);