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Subject: [PATCH RT] enable interrupts in do_page_fault for users (take 2 -
	add i386 fix too)
From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: LKML <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
       Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
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Date: Wed, 06 Jun 2007 21:42:27 -0400
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Thomas,

Can you replace my previous patch with this one. This one includes the
fix for i386.

-- Steve

Index: linux-2.6.21-rt9/arch/x86_64/mm/fault.c
===================================================================
--- linux-2.6.21-rt9.orig/arch/x86_64/mm/fault.c
+++ linux-2.6.21-rt9/arch/x86_64/mm/fault.c
@@ -476,6 +476,10 @@ bad_area:
 bad_area_nosemaphore:
 	/* User mode accesses just cause a SIGSEGV */
 	if (error_code & PF_USER) {
+
+		/* it's possible to have interrupts off here */
+		local_irq_enable();
+
 		if (is_prefetch(regs, address, error_code))
 			return;
 
Index: linux-2.6.21-rt9/arch/i386/mm/fault.c
===================================================================
--- linux-2.6.21-rt9.orig/arch/i386/mm/fault.c
+++ linux-2.6.21-rt9/arch/i386/mm/fault.c
@@ -459,6 +459,10 @@ bad_area:
 bad_area_nosemaphore:
 	/* User mode accesses just cause a SIGSEGV */
 	if (error_code & 4) {
+
+		/* it's possible to have interrupts off here */
+		local_irq_enable();
+
 		/* 
 		 * Valid to do another page fault here because this one came 
 		 * from user space.