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Squashfs: Optimized uncompressed buffer loop 

Merged the two for loops. We might get a little gain by overlapping
wait_on_bh and the memcpy operations.

Signed-off-by: Manish Sharma <manishrma@gmail.com>
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
This commit is contained in:
Manish Sharma 2013-09-04 22:31:23 +05:30 committed by Phillip Lougher
parent 28d7b5684b
commit e0125262a2
1 changed files with 4 additions and 7 deletions
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11
fs/squashfs/block.c
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@ -167,17 +167,14 @@ int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
/*
* Block is uncompressed.
*/
int i, in, pg_offset = 0;
for (i = 0; i < b; i++) {
wait_on_buffer(bh[i]);
if (!buffer_uptodate(bh[i]))
goto block_release;
}
int in, pg_offset = 0;
for (bytes = length; k < b; k++) {
in = min(bytes, msblk->devblksize - offset);
bytes -= in;
wait_on_buffer(bh[k]);
if (!buffer_uptodate(bh[k]))
goto block_release;
while (in) {
if (pg_offset == PAGE_CACHE_SIZE) {
page++;