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authorIngo Molnar <mingo@elte.hu>2007-03-22 12:31:19 +0300
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-23 05:42:31 +0300
commit4edc5db83f574dfcc8be35b7b96760ded543b360 (patch)
tree73130848bbb4706699b70621ee2b4d587830cedf
parent9c35dd7f8bda1849dcb430be99325504221048df (diff)
downloadlinux-4edc5db83f574dfcc8be35b7b96760ded543b360.tar.xz
[PATCH] setup_boot_APIC_clock() irq-enable fix
latest -git triggers an irqtrace/lockdep warning of a leaked irqs-off condition: BUG: at kernel/fork.c:1033 copy_process() after some debugging it turns out that commit ca1b940c accidentally left interrupts disabled - which trickled down all the way to the first time we fork a kernel thread and triggered the warning. the fix is to re-enable interrupts in the 'else' branch of setup_boot_APIC_clock()'s pmtimers calibration path. Reported-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Thomas Gleixner <tglx@brown.paperbag.linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/i386/kernel/apic.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index 36825117835d..244c3fe9b8c3 100644
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -506,7 +506,8 @@ void __init setup_boot_APIC_clock(void)
apic_printk(APIC_VERBOSE, "... jiffies result ok\n");
else
local_apic_timer_verify_ok = 0;
- }
+ } else
+ local_irq_enable();
if (!local_apic_timer_verify_ok) {
printk(KERN_WARNING