diff mbox

batman-adv: Add compat code for BUILD_BUG_ON_NOT_POWER_OF_2

Message ID 1453280981-3324-1-git-send-email-sven@open-mesh.com (mailing list archive)
State Superseded, archived
Headers

Commit Message

Sven Eckelmann Jan. 20, 2016, 9:09 a.m. UTC 
  Fixes: 2c2fe0ba9ea5 ("batman-adv: ELP - creating neighbor structures")
Signed-off-by: Sven Eckelmann <sven@open-mesh.com>
---
 compat-include/linux/bug.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox

Patch

diff --git a/compat-include/linux/bug.h b/compat-include/linux/bug.h
index 124fd28..0c46158 100644
--- a/compat-include/linux/bug.h
+++ b/compat-include/linux/bug.h
@@ -24,6 +24,19 @@ 
 #include <linux/version.h>
 #include_next <linux/bug.h>
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
+
+#undef BUILD_BUG_ON_NOT_POWER_OF_2
+#ifdef __CHECKER__
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
+#else
+/* Force a compilation error if a constant expression is not a power of 2 */
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \
+	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
+#endif
+
+#endif /* < KERNEL_VERSION(2, 6, 33) */
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 0, 0)
 
 #undef BUILD_BUG_ON