Add a helper to avoid duplication in the subsequent changes.
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
include/linux/log2.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 9f30d087a128..19e773116ae3 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -33,6 +33,8 @@ int __ilog2_u64(u64 n)
}
#endif
+#define __IS_POWER_OF_2(n) ((n) != 0 && (((n) & ((n) - 1)) == 0))
+
/**
* is_power_of_2() - check if a value is a power of two
* @n: the value to check
@@ -44,7 +46,7 @@ int __ilog2_u64(u64 n)
static inline __attribute__((const))
bool is_power_of_2(unsigned long n)
{
- return (n != 0 && ((n & (n - 1)) == 0));
+ return __IS_POWER_OF_2(n);
}
/**
--
2.39.2
