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 <[email protected]> Cc: Yann Collet <[email protected]> Cc: Vasily Averin <[email protected]> Cc: Gao Xiang <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Pranav Vashi <[email protected]> Signed-off-by: engstk <[email protected]>
engstk · Jul 18, 2022 · f0d0ac3 · f0d0ac3
1 parent 070a874
commit f0d0ac3
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
@@ -140,6 +140,9 @@ 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)
 		   /*