From: Sven Eckelmann <sven@open-mesh.com>
To: b.a.t.m.a.n@lists.open-mesh.org
Cc: Sven Eckelmann <sven@open-mesh.com>
Subject: [B.A.T.M.A.N.] [PATCH v2] batman-adv: Add compat code for BUILD_BUG_ON_NOT_POWER_OF_2
Date: Wed, 20 Jan 2016 19:00:15 +0100 [thread overview]
Message-ID: <1453312815-20752-1-git-send-email-sven@open-mesh.com> (raw)
Fixes: 2c2fe0ba9ea5 ("batman-adv: ELP - creating neighbor structures")
Signed-off-by: Sven Eckelmann <sven@open-mesh.com>
---
v2:
- add missing include in average.h which is required to always defined
BUILD_BUG_ON_NOT_POWER_OF_2 correctly
compat-include/linux/average.h | 2 ++
compat-include/linux/bug.h | 13 +++++++++++++
2 files changed, 15 insertions(+)
diff --git a/compat-include/linux/average.h b/compat-include/linux/average.h
index e5a2bf5..631df9b 100644
--- a/compat-include/linux/average.h
+++ b/compat-include/linux/average.h
@@ -26,6 +26,8 @@
#include_next <linux/average.h>
#endif
+#include <linux/bug.h>
+
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
/* Exponentially weighted moving average (EWMA) */
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
--
2.7.0.rc3
next reply other threads:[~2016-01-20 18:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 18:00 Sven Eckelmann [this message]
2016-01-30 4:17 ` [B.A.T.M.A.N.] [PATCH v2] batman-adv: Add compat code for BUILD_BUG_ON_NOT_POWER_OF_2 Marek Lindner
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