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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>
This commit is contained in:
Arnd Bergmann 2010-10-28 16:12:33 +02:00 committed by Linus Torvalds
parent 020e773f6b
commit 7fe19da4ca
1 changed files with 6 additions and 2 deletions
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8
include/linux/hardirq.h
View File

@ -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