include/linux/log2.h: add missing () around n in roundup_pow_of_two()

Otherwise gcc generates warnings if the expression is complicated.

Fixes: 3a2c69c4aac1 ("[PATCH] LOG2: Alter roundup_pow_of_two() so that it can use a ilog2() on a constant")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/0-v1-8a2697e3c003+41165-log_brackets_jgg@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/log2.h b/include/linux/log2.h
index 83a4a3ca3e8a76f4a80b8740bd8f82b2d68fae59..c619ec6eff4aee113ab5a20381a9662a9df02796 100644 (file)
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -173,7 +173,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
 #define roundup_pow_of_two(n)                  \
 (                                              \
        __builtin_constant_p(n) ? (             \
-               (n == 1) ? 1 :                  \
+               ((n) == 1) ? 1 :                \
                (1UL << (ilog2((n) - 1) + 1))   \
                                   ) :          \
        __roundup_pow_of_two(n)                 \