[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>
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index e973972..db0d53f 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -35,11 +35,11 @@
#define XLOG_VERSION_1 1
#define XLOG_VERSION_2 2 /* Large IClogs, Log sunit */
#define XLOG_VERSION_OKBITS (XLOG_VERSION_1 | XLOG_VERSION_2)
-#define XLOG_RECORD_BSIZE (16*1024) /* eventually 32k */
+#define XLOG_MIN_RECORD_BSIZE (16*1024) /* eventually 32k */
#define XLOG_BIG_RECORD_BSIZE (32*1024) /* 32k buffers */
#define XLOG_MAX_RECORD_BSIZE (256*1024)
#define XLOG_HEADER_CYCLE_SIZE (32*1024) /* cycle data in header */
-#define XLOG_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */
+#define XLOG_MIN_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */
#define XLOG_BIG_RECORD_BSHIFT 15 /* 32k == 1 << 15 */
#define XLOG_MAX_RECORD_BSHIFT 18 /* 256k == 1 << 18 */
#define XLOG_BTOLSUNIT(log, b) (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 11f5ea2..47c8907 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -238,11 +238,9 @@
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);