linux-kernel - Re: [BUG 2.6.24-rc6-mm1] BUG() at check_irqs

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Message-ID: <20071223151656.GA18738@elte.hu>
Date:	Sun, 23 Dec 2007 16:16:56 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [BUG 2.6.24-rc6-mm1] BUG() at check_irqs_on() in fs/buffer.c .


* Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> wrote:

> Hello.
> 
> I encountered a BUG().
> I didn't encounter this bug for 2.6.24-rc5-mm1 .
> I guess this bug was introduced between 2.6.24-rc5-mm1 and 2.6.24-rc6-mm1 .

does the patch below help?

	Ingo

---
 include/asm-x86/desc.h |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux/include/asm-x86/desc.h
===================================================================
--- linux.orig/include/asm-x86/desc.h
+++ linux/include/asm-x86/desc.h
@@ -328,7 +328,11 @@ static inline void set_trap_gate(unsigne
 static inline void set_system_gate(unsigned int n, void *addr)
 {
 	BUG_ON((unsigned)n > 0xFF);
+#ifdef CONFIG_X86_32
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+#else
 	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+#endif
 }
 
 static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
--
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