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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-09 10:35:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-09 10:35:12 +0100 |
| commit | 44b0635481437140b0e29d6023f05e805d5e7620 (patch) | |
| tree | ff31986115075410d0479df307a6b9841976026c /include/linux/hardirq.h | |
| parent | 4ad476e11f94fd3724c6e272d8220e99cd222b27 (diff) | |
| parent | 57794a9d48b63e34acbe63282628c9f029603308 (diff) | |
| download | talos-op-linux-44b0635481437140b0e29d6023f05e805d5e7620.tar.gz talos-op-linux-44b0635481437140b0e29d6023f05e805d5e7620.zip | |
Merge branch 'tip/tracing/core/devel' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
Conflicts:
kernel/trace/trace_hw_branches.c
Diffstat (limited to 'include/linux/hardirq.h')
| -rw-r--r-- | include/linux/hardirq.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h index f83288347dda..f3cf86e1465b 100644 --- a/include/linux/hardirq.h +++ b/include/linux/hardirq.h @@ -61,6 +61,12 @@ #error PREEMPT_ACTIVE is too low! #endif +#define NMI_OFFSET (PREEMPT_ACTIVE << 1) + +#if NMI_OFFSET >= 0x80000000 +#error PREEMPT_ACTIVE too high! +#endif + #define hardirq_count() (preempt_count() & HARDIRQ_MASK) #define softirq_count() (preempt_count() & SOFTIRQ_MASK) #define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK)) @@ -73,6 +79,11 @@ #define in_softirq() (softirq_count()) #define in_interrupt() (irq_count()) +/* + * Are we in NMI context? + */ +#define in_nmi() (preempt_count() & NMI_OFFSET) + #if defined(CONFIG_PREEMPT) # define PREEMPT_INATOMIC_BASE kernel_locked() # define PREEMPT_CHECK_OFFSET 1 @@ -167,6 +178,8 @@ extern void irq_exit(void); #define nmi_enter() \ do { \ ftrace_nmi_enter(); \ + BUG_ON(in_nmi()); \ + add_preempt_count(NMI_OFFSET); \ lockdep_off(); \ rcu_nmi_enter(); \ __irq_enter(); \ @@ -177,6 +190,8 @@ extern void irq_exit(void); __irq_exit(); \ rcu_nmi_exit(); \ lockdep_on(); \ + BUG_ON(!in_nmi()); \ + sub_preempt_count(NMI_OFFSET); \ ftrace_nmi_exit(); \ } while (0) |
