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| author | Christoph Hellwig <hch@lst.de> | 2011-07-08 14:36:05 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2011-07-08 14:36:05 +0200 |
| commit | 69ef921b55cc3788d1d2a27b33b27d04acd0090a (patch) | |
| tree | bcc7c1f4b7f15628f122dfdb96f8d4d37f587e92 /fs/xfs/xfs_attr.c | |
| parent | 218106a1104c598011e5df9d9aac7e0416be03e6 (diff) | |
| download | op-kernel-dev-69ef921b55cc3788d1d2a27b33b27d04acd0090a.zip op-kernel-dev-69ef921b55cc3788d1d2a27b33b27d04acd0090a.tar.gz | |
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_attr.c')
| -rw-r--r-- | fs/xfs/xfs_attr.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c index 795d5aa..cbae424 100644 --- a/fs/xfs/xfs_attr.c +++ b/fs/xfs/xfs_attr.c @@ -1203,7 +1203,7 @@ xfs_attr_leaf_list(xfs_attr_list_context_t *context) return XFS_ERROR(error); ASSERT(bp != NULL); leaf = bp->data; - if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_ATTR_LEAF_MAGIC)) { + if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, context->dp->i_mount, leaf); xfs_da_brelse(NULL, bp); @@ -1610,9 +1610,8 @@ xfs_attr_node_removename(xfs_da_args_t *args) XFS_ATTR_FORK); if (error) goto out; - ASSERT(be16_to_cpu(((xfs_attr_leafblock_t *) - bp->data)->hdr.info.magic) - == XFS_ATTR_LEAF_MAGIC); + ASSERT((((xfs_attr_leafblock_t *)bp->data)->hdr.info.magic) == + cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { xfs_bmap_init(args->flist, args->firstblock); @@ -1877,11 +1876,11 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) return(XFS_ERROR(EFSCORRUPTED)); } node = bp->data; - if (be16_to_cpu(node->hdr.info.magic) - == XFS_ATTR_LEAF_MAGIC) + if (node->hdr.info.magic == + cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) break; - if (unlikely(be16_to_cpu(node->hdr.info.magic) - != XFS_DA_NODE_MAGIC)) { + if (unlikely(node->hdr.info.magic != + cpu_to_be16(XFS_DA_NODE_MAGIC))) { XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", XFS_ERRLEVEL_LOW, context->dp->i_mount, @@ -1916,8 +1915,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) */ for (;;) { leaf = bp->data; - if (unlikely(be16_to_cpu(leaf->hdr.info.magic) - != XFS_ATTR_LEAF_MAGIC)) { + if (unlikely(leaf->hdr.info.magic != + cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", XFS_ERRLEVEL_LOW, context->dp->i_mount, leaf); |
