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>

diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index fb50652..41d108e 100644 (file)
--- 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++;