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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-20 18:30:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-20 18:30:37 -0800
commit2b1caf6ed7b888c95a1909d343799672731651a5 (patch)
tree7ab9a7ae13bc02376bce6267df67f6f2aa9091f1 /init
parentd551d81d6a720542873f478def60baab6b5df403 (diff)
parentbd924e8cbd4b73ffb7d707a774c04f7e2cae88ed (diff)
downloadlinux-2.6.38-lt-ux500-2b1caf6ed7b888c95a1909d343799672731651a5.tar.gz
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.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/init/main.c b/init/main.c
index 00799c1d462..33c37c379e9 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. */