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Date: Sun, 8 Oct 2006 11:24:28 +0300 (EEST) From: Pekka J Enberg <penberg@...helsinki.fi> To: akpm@...l.org cc: linux-kernel@...r.kernel.org, dhowells@...hat.com, jdike@...toit.com, blaisorblade@...oo.it Subject: [PATCH] um: setup irq regs in do_IRQ From: Pekka Enberg <penberg@...helsinki.fi> We need to setup and restore IRQ registers in __do_IRQ so that get_irq_regs works correctly. Fixes Alt-Sysrq-p for UML. Cc: Jeff Dike <jdike@...toit.com> Cc: Paolo "Blaisorblade" Giarrusso <blaisorblade@...oo.it> Signed-Off-By: David Howells <dhowells@...hat.com> Signed-off-by: Pekka Enberg <penberg@...helsinki.fi> --- arch/um/kernel/irq.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) Index: 2.6/arch/um/kernel/irq.c =================================================================== --- 2.6.orig/arch/um/kernel/irq.c +++ 2.6/arch/um/kernel/irq.c @@ -355,10 +355,14 @@ void forward_interrupts(int pid) */ unsigned int do_IRQ(int irq, union uml_pt_regs *regs) { - irq_enter(); - __do_IRQ(irq); - irq_exit(); - return 1; + struct pt_regs *old_regs; + + old_regs = set_irq_regs((struct pt_regs *) regs); + irq_enter(); + __do_IRQ(irq); + irq_exit(); + set_irq_regs(old_regs); + return 1; } int um_request_irq(unsigned int irq, int fd, int type, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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