From: Jason Gunthorpe jgg@nvidia.com
stable inclusion from linux-4.19.144 commit 95968e5cbb5db7ff33288d01a95349d476f19248
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[ Upstream commit 428fc0aff4e59399ec719ffcc1f7a5d29a4ee476 ]
Otherwise gcc generates warnings if the expression is complicated.
Fixes: 312a0c170945 ("[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.co... Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- include/linux/log2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/log2.h b/include/linux/log2.h index 2af7f77866d0..78496801cddf 100644 --- a/include/linux/log2.h +++ b/include/linux/log2.h @@ -177,7 +177,7 @@ 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) \