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authorChristoph Hellwig <hch@lst.de>2011-07-08 14:36:05 +0200
committerChristoph Hellwig <hch@lst.de>2011-07-08 14:36:05 +0200
commit69ef921b55cc3788d1d2a27b33b27d04acd0090a (patch)
treebcc7c1f4b7f15628f122dfdb96f8d4d37f587e92 /fs/xfs/xfs_log.c
parent218106a1104c598011e5df9d9aac7e0416be03e6 (diff)
xfs: byteswap constants instead of variables
Micro-optimize various comparisms by always byteswapping the constant instead of the variable, which allows to do the swap at compile instead of runtime. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/xfs_log.c')
-rw-r--r--fs/xfs/xfs_log.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 41d5b8f2bf92..5b24a71811f8 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -3521,13 +3521,13 @@ xlog_verify_iclog(xlog_t *log,
spin_unlock(&log->l_icloglock);
/* check log magic numbers */
- if (be32_to_cpu(iclog->ic_header.h_magicno) != XLOG_HEADER_MAGIC_NUM)
+ if (iclog->ic_header.h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))
xfs_emerg(log->l_mp, "%s: invalid magic num", __func__);
ptr = (xfs_caddr_t) &iclog->ic_header;
for (ptr += BBSIZE; ptr < ((xfs_caddr_t)&iclog->ic_header) + count;
ptr += BBSIZE) {
- if (be32_to_cpu(*(__be32 *)ptr) == XLOG_HEADER_MAGIC_NUM)
+ if (*(__be32 *)ptr == cpu_to_be32(XLOG_HEADER_MAGIC_NUM))
xfs_emerg(log->l_mp, "%s: unexpected magic num",
__func__);
}