From: Joe Perches <joe@perches.com>
Date: Thu, 11 Jun 2020 01:41:32 +0000 (-0700)
Subject: lib/lz4/lz4_decompress.c: document deliberate use of `&'
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e8ec04938c446e5f4dc53e0147f0f679995012ee;p=linux.git

lib/lz4/lz4_decompress.c: document deliberate use of `&'

This operation was intentional, but tools such as smatch will warn that it
might not have been.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Yann Collet <cyan@fb.com>
Cc: Vasily Averin <vvs@virtuozzo.com>
Cc: Gao Xiang <hsiangkao@aol.com>
Link: http://lkml.kernel.org/r/3bf931c6ea0cae3e23f3485801986859851b4f04.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index 0c9d3ad17e0fc..5371dab6b4810 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -141,6 +141,9 @@ static FORCE_INLINE int LZ4_decompress_generic(
 		 * space in the output for those 18 bytes earlier, upon
 		 * entering the shortcut (in other words, there is a
 		 * combined check for both stages).
+		 *
+		 * The & in the likely() below is intentionally not && so that
+		 * some compilers can produce better parallelized runtime code
 		 */
 		if ((endOnInput ? length != RUN_MASK : length <= 8)
 		   /*