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authorTejun Heo <tj@kernel.org>2011-01-20 12:06:35 +0100
committerIngo Molnar <mingo@elte.hu>2011-01-20 13:32:33 +0100
commit2ce802f62ba32a7d95748ac92bf351f76affb6ff (patch)
tree54dd0d6063ca61619e6b8ca84dd95b8e5a3c1402 /include
parent12fcdba1b7ae8b25696433f420b775aeb556d89b (diff)
lockdep: Move early boot local IRQ enable/disable status to init/main.c
During early boot, local IRQ is disabled until IRQ subsystem is properly initialized. During this time, no one should enable local IRQ and some operations which usually are not allowed with IRQ disabled, e.g. operations which might sleep or require communications with other processors, are allowed. lockdep tracked this with early_boot_irqs_off/on() callbacks. As other subsystems need this information too, move it to init/main.c and make it generally available. While at it, toggle the boolean to early_boot_irqs_disabled instead of enabled so that it can be initialized with %false and %true indicates the exceptional condition. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <20110120110635.GB6036@htj.dyndns.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kernel.h2
-rw-r--r--include/linux/lockdep.h8
2 files changed, 2 insertions, 8 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5a9d9059520b..d07d8057e440 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -243,6 +243,8 @@ extern int test_taint(unsigned flag);
extern unsigned long get_taint(void);
extern int root_mountflags;
+extern bool early_boot_irqs_disabled;
+
/* Values used for system_state */
extern enum system_states {
SYSTEM_BOOTING,
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 71c09b26c759..f638fd78d106 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -436,16 +436,8 @@ do { \
#endif /* CONFIG_LOCKDEP */
#ifdef CONFIG_TRACE_IRQFLAGS
-extern void early_boot_irqs_off(void);
-extern void early_boot_irqs_on(void);
extern void print_irqtrace_events(struct task_struct *curr);
#else
-static inline void early_boot_irqs_off(void)
-{
-}
-static inline void early_boot_irqs_on(void)
-{
-}
static inline void print_irqtrace_events(struct task_struct *curr)
{
}