Hi,
A fix that solves a boot crash in certain circumstances, please queue this up
for
-stable once it hits Linus's tree.
Thanks,
Ingo
----- Forwarded message from tip-bot for Brian Gerst <[email protected]> -----
Date: Tue, 18 Jan 2011 19:03:53 GMT
From: tip-bot for Brian Gerst <[email protected]>
To: [email protected]
Cc: [email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected], [email protected],
[email protected], [email protected]
Subject: [tip:x86/urgent] x86: Clear irqstack thread_info
Commit-ID: 7b698ea377e10b074ceef0d79218e6622d618421
Gitweb: http://git.kernel.org/tip/7b698ea377e10b074ceef0d79218e6622d618421
Author: Brian Gerst <[email protected]>
AuthorDate: Mon, 17 Jan 2011 07:32:10 -0500
Committer: Ingo Molnar <[email protected]>
CommitDate: Tue, 18 Jan 2011 14:58:37 +0100
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 <[email protected]>
Signed-off-by: Brian Gerst <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Linus Torvalds <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86/kernel/irq_32.c | 7 ++-----
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 96656f2..5206bb9 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;
----- End forwarded message -----
--
Thanks,
Ingo
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