linux-kernel - [PATCH 1/7] i386, dumpstack: Move crash_kexec before bust_spinlocks(0) in oops

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Message-Id: <1224669614-25863-2-git-send-email-heukelum@fastmail.fm>
Date:	Wed, 22 Oct 2008 12:00:08 +0200
From:	Alexander van Heukelum <heukelum@...tmail.fm>
To:	Neil Horman <nhorman@...driver.com>, Ingo Molnar <mingo@...e.hu>,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	vgoyal@...hat.com, hbabu@...ibm.com, hpa@...or.com,
	akpm@...ux-foundation.org,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	ebiederm@...ssion.com, tglx@...utronix.de
Cc:	Alexander van Heukelum <heukelum@...tmail.fm>,
	"Neil Horman" <nhorman@...driver.com>
Subject: [PATCH 1/7] i386, dumpstack: Move crash_kexec before bust_spinlocks(0) in oops_end

crash_kexec should not be called with console_sem held. Move
the call before bust_spinlocks(0) in oops_end to avoid the
problem.

Signed-off-by: Alexander van Heukelum <heukelum@...tmail.fm>
Cc: "Neil Horman" <nhorman@...driver.com>
---
 arch/x86/kernel/dumpstack_32.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index b361475..5493d31 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -309,6 +309,9 @@ unsigned __kprobes long oops_begin(void)
 
 void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
 {
+	if (regs && kexec_should_crash(current))
+		crash_kexec(regs);
+
 	bust_spinlocks(0);
 	die_owner = -1;
 	add_taint(TAINT_DIE);
@@ -318,8 +321,6 @@ void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
 	if (!regs)
 		return;
 
-	if (kexec_should_crash(current))
-		crash_kexec(regs);
 	if (in_interrupt())
 		panic("Fatal exception in interrupt");
 	if (panic_on_oops)
-- 
1.5.4.3

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