Commit e0125262 authored by Manish Sharma's avatar Manish Sharma Committed by Phillip Lougher
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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: default avatarManish Sharma <manishrma@gmail.com>
Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
parent 28d7b568

fs/squashfs/block.c

+4 −7
Original line number Diff line number Diff line
@@ -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++;