The patch titled
Subject: lib/lz4/lz4_decompress.c: document deliberate use of `&'
has been added to the -mm tree. Its filename is
lib-lz4-lz4_decompressc-document-deliberate-use-of.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-lz4-lz4_decompressc-document-deliberate-use-of.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-lz4-lz4_decompressc-document-deliberate-use-of.patch
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------------------------------------------------------
From: Joe Perches <joe@xxxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/3bf931c6ea0cae3e23f3485801986859851b4f04.camel@xxxxxxxxxxx
Cc: Yann Collet <cyan@xxxxxx>
Cc: Vasily Averin <vvs@xxxxxxxxxxxxx>
Cc: Gao Xiang <hsiangkao@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/lz4/lz4_decompress.c | 3 +++
1 file changed, 3 insertions(+)
--- a/lib/lz4/lz4_decompress.c~lib-lz4-lz4_decompressc-document-deliberate-use-of
+++ a/lib/lz4/lz4_decompress.c
@@ -141,6 +141,9 @@ static FORCE_INLINE int LZ4_decompress_g
* 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)
/*
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
lib-lz4-lz4_decompressc-document-deliberate-use-of.patch
checkpatch-test-git_dir-changes.patch
checkpatch-add-test-for-possible-misuse-of-is_enabled-without-config_.patch
