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authorBrian Gerst <brgerst@gmail.com>2011-01-17 07:32:10 -0500
committerIngo Molnar <mingo@elte.hu>2011-01-18 14:58:37 +0100
commit7b698ea377e10b074ceef0d79218e6622d618421 (patch)
tree64c58c50fb3bb196b3e50abac4bf6ae3dd2719e6 /arch
parent86b1e8dd83cbb0fcbf3d61d2b461df8be1f528cf (diff)
downloadlinux-7b698ea377e10b074ceef0d79218e6622d618421.tar.bz2
x86: Clear irqstack thread_info
Mathias Merz reported that v2.6.37 failed to boot on his system. Make sure that the thread_info part of the irqstack is initialized to zeroes. Reported-and-Tested-by: Matthias Merz <linux@merz-ka.de> Signed-off-by: Brian Gerst <brgerst@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <AANLkTimyKXfJ1x8tgwrr1hYnNLrPfgE1NTe4z7L6tUDm@mail.gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/irq_32.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 96656f207751..5206bb98b16d 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -129,8 +129,7 @@ void __cpuinit irq_ctx_init(int cpu)
irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
THREAD_FLAGS,
THREAD_ORDER));
- irqctx->tinfo.task = NULL;
- irqctx->tinfo.exec_domain = NULL;
+ memset(&irqctx->tinfo, 0, sizeof(struct thread_info));
irqctx->tinfo.cpu = cpu;
irqctx->tinfo.preempt_count = HARDIRQ_OFFSET;
irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
@@ -140,10 +139,8 @@ void __cpuinit irq_ctx_init(int cpu)
irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
THREAD_FLAGS,
THREAD_ORDER));
- irqctx->tinfo.task = NULL;
- irqctx->tinfo.exec_domain = NULL;
+ memset(&irqctx->tinfo, 0, sizeof(struct thread_info));
irqctx->tinfo.cpu = cpu;
- irqctx->tinfo.preempt_count = 0;
irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
per_cpu(softirq_ctx, cpu) = irqctx;