diff mbox

[kvm-unit-tests,v8,03/14] libcflat: introduce is_power_of_2()

Message ID 1481512100-10380-4-git-send-email-peterx@redhat.com
State New
Headers show

Commit Message

Peter Xu Dec. 12, 2016, 3:08 a.m. UTC 
Suggested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 lib/libcflat.h | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/lib/libcflat.h b/lib/libcflat.h
index c622198..8455c3d 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -104,4 +104,9 @@  do {									\
 	}								\
 } while (0)
 
+static inline bool is_power_of_2(unsigned long n)
+{
+	return n && !(n & (n - 1));
+}
+
 #endif