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authorManish Sharma <manishrma@gmail.com>2013-09-04 22:31:23 +0530
committerPhillip Lougher <phillip@squashfs.org.uk>2013-09-05 00:13:37 +0100
commite0125262a2f5cefbfb3804117f8ab16e9ba13e29 (patch)
tree9c2ba3a01df9a1ab647cfc6105e80f521ff9e9f3
parent28d7b5684ba98e163ba37779fd09de01fac5261d (diff)
downloadop-kernel-dev-e0125262a2f5cefbfb3804117f8ab16e9ba13e29.zip
op-kernel-dev-e0125262a2f5cefbfb3804117f8ab16e9ba13e29.tar.gz
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>
-rw-r--r--fs/squashfs/block.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index fb50652..41d108e 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -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++;
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