From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 28 Oct 2010 14:12:33 +0000 (+0200)
Subject: preempt: fix kernel build with !CONFIG_BKL
X-Git-Url: https://bbs.cooldavid.org/git/?p=net-next-2.6.git;a=commitdiff_plain;h=7fe19da4ca38fc20cdbc7020fcf2eca8fc756410

preempt: fix kernel build with !CONFIG_BKL

The preempt count logic tries to take the BKL into account, which breaks
when CONFIG_BKL is not set.

Use the same preempt_count offset that we use without CONFIG_PREEMPT
when CONFIG_BKL is disabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reported-and-tested-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index 8a389b608ce..41cb31f14ee 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -96,11 +96,15 @@
  */
 #define in_nmi()	(preempt_count() & NMI_MASK)
 
-#if defined(CONFIG_PREEMPT)
+#if defined(CONFIG_PREEMPT) && defined(CONFIG_BKL)
 # define PREEMPT_INATOMIC_BASE kernel_locked()
-# define PREEMPT_CHECK_OFFSET 1
 #else
 # define PREEMPT_INATOMIC_BASE 0
+#endif
+
+#if defined(CONFIG_PREEMPT)
+# define PREEMPT_CHECK_OFFSET 1
+#else
 # define PREEMPT_CHECK_OFFSET 0
 #endif