Message ID | 20230330104243.2120761-2-jani.nikula@intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | log2: make is_power_of_2() more generic | expand |
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); } /**
Add a helper to avoid duplication in the subsequent changes. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christian König <christian.koenig@amd.com> Cc: David Gow <davidgow@google.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> --- include/linux/log2.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)