diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 18:30:37 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 18:30:37 -0800 |
| commit | 2b1caf6ed7b888c95a1909d343799672731651a5 (patch) | |
| tree | 7ab9a7ae13bc02376bce6267df67f6f2aa9091f1 /init | |
| parent | d551d81d6a720542873f478def60baab6b5df403 (diff) | |
| parent | bd924e8cbd4b73ffb7d707a774c04f7e2cae88ed (diff) | |
| download | lwn-2b1caf6ed7b888c95a1909d343799672731651a5.tar.gz lwn-2b1caf6ed7b888c95a1909d343799672731651a5.zip | |
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c
lockdep: Move early boot local IRQ enable/disable status to init/main.c
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/init/main.c b/init/main.c index 00799c1d4628..33c37c379e96 100644 --- a/init/main.c +++ b/init/main.c @@ -96,6 +96,15 @@ static inline void mark_rodata_ro(void) { } extern void tc_init(void); #endif +/* + * Debug helper: via this flag we know that we are in 'early bootup code' + * where only the boot processor is running with IRQ disabled. This means + * two things - IRQ must not be enabled before the flag is cleared and some + * operations which are not allowed with IRQ disabled are allowed while the + * flag is set. + */ +bool early_boot_irqs_disabled __read_mostly; + enum system_states system_state __read_mostly; EXPORT_SYMBOL(system_state); @@ -554,7 +563,7 @@ asmlinkage void __init start_kernel(void) cgroup_init_early(); local_irq_disable(); - early_boot_irqs_off(); + early_boot_irqs_disabled = true; /* * Interrupts are still disabled. Do necessary setups, then @@ -621,7 +630,7 @@ asmlinkage void __init start_kernel(void) if (!irqs_disabled()) printk(KERN_CRIT "start_kernel(): bug: interrupts were " "enabled early\n"); - early_boot_irqs_on(); + early_boot_irqs_disabled = false; local_irq_enable(); /* Interrupts are enabled now so all GFP allocations are safe. */ |