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>
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 71e90dc2..8fad960 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -731,7 +731,7 @@
int bytes, i;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
entry = &leaf->entries[0];
bytes = sizeof(struct xfs_attr_sf_hdr);
@@ -777,7 +777,7 @@
ASSERT(bp != NULL);
memcpy(tmpbuffer, bp->data, XFS_LBSIZE(dp->i_mount));
leaf = (xfs_attr_leafblock_t *)tmpbuffer;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
memset(bp->data, 0, XFS_LBSIZE(dp->i_mount));
/*
@@ -872,7 +872,7 @@
goto out;
node = bp1->data;
leaf = bp2->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
/* both on-disk, don't endian-flip twice */
node->btree[0].hashval =
leaf->entries[be16_to_cpu(leaf->hdr.count)-1 ].hashval;
@@ -997,7 +997,7 @@
int tablesize, entsize, sum, tmp, i;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT((args->index >= 0)
&& (args->index <= be16_to_cpu(leaf->hdr.count)));
hdr = &leaf->hdr;
@@ -1070,7 +1070,7 @@
int tmp, i;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
hdr = &leaf->hdr;
ASSERT((mapindex >= 0) && (mapindex < XFS_ATTR_LEAF_MAPSIZE));
ASSERT((args->index >= 0) && (args->index <= be16_to_cpu(hdr->count)));
@@ -1256,8 +1256,8 @@
ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC);
leaf1 = blk1->bp->data;
leaf2 = blk2->bp->data;
- ASSERT(be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
- ASSERT(be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+ ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
args = state->args;
/*
@@ -1533,7 +1533,7 @@
*/
blk = &state->path.blk[ state->path.active-1 ];
info = blk->bp->data;
- ASSERT(be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
leaf = (xfs_attr_leafblock_t *)info;
count = be16_to_cpu(leaf->hdr.count);
bytes = sizeof(xfs_attr_leaf_hdr_t) +
@@ -1596,7 +1596,7 @@
bytes = state->blocksize - (state->blocksize>>2);
bytes -= be16_to_cpu(leaf->hdr.usedbytes);
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
count += be16_to_cpu(leaf->hdr.count);
bytes -= be16_to_cpu(leaf->hdr.usedbytes);
bytes -= count * sizeof(xfs_attr_leaf_entry_t);
@@ -1650,7 +1650,7 @@
xfs_mount_t *mp;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
hdr = &leaf->hdr;
mp = args->trans->t_mountp;
ASSERT((be16_to_cpu(hdr->count) > 0)
@@ -1813,8 +1813,8 @@
ASSERT(save_blk->magic == XFS_ATTR_LEAF_MAGIC);
drop_leaf = drop_blk->bp->data;
save_leaf = save_blk->bp->data;
- ASSERT(be16_to_cpu(drop_leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
- ASSERT(be16_to_cpu(save_leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(drop_leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+ ASSERT(save_leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
drop_hdr = &drop_leaf->hdr;
save_hdr = &save_leaf->hdr;
@@ -1915,7 +1915,7 @@
xfs_dahash_t hashval;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(be16_to_cpu(leaf->hdr.count)
< (XFS_LBSIZE(args->dp->i_mount)/8));
@@ -2019,7 +2019,7 @@
xfs_attr_leaf_name_remote_t *name_rmt;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(be16_to_cpu(leaf->hdr.count)
< (XFS_LBSIZE(args->dp->i_mount)/8));
ASSERT(args->index < be16_to_cpu(leaf->hdr.count));
@@ -2087,8 +2087,8 @@
/*
* Set up environment.
*/
- ASSERT(be16_to_cpu(leaf_s->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
- ASSERT(be16_to_cpu(leaf_d->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf_s->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+ ASSERT(leaf_d->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
hdr_s = &leaf_s->hdr;
hdr_d = &leaf_d->hdr;
ASSERT((be16_to_cpu(hdr_s->count) > 0) &&
@@ -2222,8 +2222,8 @@
leaf1 = leaf1_bp->data;
leaf2 = leaf2_bp->data;
- ASSERT((be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC) &&
- (be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC));
+ ASSERT((leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) &&
+ (leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)));
if ((be16_to_cpu(leaf1->hdr.count) > 0) &&
(be16_to_cpu(leaf2->hdr.count) > 0) &&
((be32_to_cpu(leaf2->entries[0].hashval) <
@@ -2246,7 +2246,7 @@
xfs_attr_leafblock_t *leaf;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
if (count)
*count = be16_to_cpu(leaf->hdr.count);
if (!leaf->hdr.count)
@@ -2265,7 +2265,7 @@
xfs_attr_leaf_name_remote_t *name_rmt;
int size;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
if (leaf->entries[index].flags & XFS_ATTR_LOCAL) {
name_loc = xfs_attr_leaf_name_local(leaf, index);
size = xfs_attr_leaf_entsize_local(name_loc->namelen,
@@ -2451,7 +2451,7 @@
ASSERT(bp != NULL);
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf->hdr.count));
ASSERT(args->index >= 0);
entry = &leaf->entries[ args->index ];
@@ -2515,7 +2515,7 @@
ASSERT(bp != NULL);
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf->hdr.count));
ASSERT(args->index >= 0);
entry = &leaf->entries[ args->index ];
@@ -2585,13 +2585,13 @@
}
leaf1 = bp1->data;
- ASSERT(be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf1->hdr.count));
ASSERT(args->index >= 0);
entry1 = &leaf1->entries[ args->index ];
leaf2 = bp2->data;
- ASSERT(be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index2 < be16_to_cpu(leaf2->hdr.count));
ASSERT(args->index2 >= 0);
entry2 = &leaf2->entries[ args->index2 ];
@@ -2689,9 +2689,9 @@
* This is a depth-first traversal!
*/
info = bp->data;
- if (be16_to_cpu(info->magic) == XFS_DA_NODE_MAGIC) {
+ if (info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC)) {
error = xfs_attr_node_inactive(trans, dp, bp, 1);
- } else if (be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC) {
+ } else if (info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) {
error = xfs_attr_leaf_inactive(trans, dp, bp);
} else {
error = XFS_ERROR(EIO);
@@ -2739,7 +2739,7 @@
}
node = bp->data;
- ASSERT(be16_to_cpu(node->hdr.info.magic) == XFS_DA_NODE_MAGIC);
+ ASSERT(node->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC));
parent_blkno = xfs_da_blkno(bp); /* save for re-read later */
count = be16_to_cpu(node->hdr.count);
if (!count) {
@@ -2773,10 +2773,10 @@
* Invalidate the subtree, however we have to.
*/
info = child_bp->data;
- if (be16_to_cpu(info->magic) == XFS_DA_NODE_MAGIC) {
+ if (info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC)) {
error = xfs_attr_node_inactive(trans, dp,
child_bp, level+1);
- } else if (be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC) {
+ } else if (info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) {
error = xfs_attr_leaf_inactive(trans, dp,
child_bp);
} else {
@@ -2836,7 +2836,7 @@
int error, count, size, tmp, i;
leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
+ ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
/*
* Count the number of "remote" value extents.
