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) /* _
