* [PATCH] arm: Call do_notify_resume() with interrupts enabled
@ 2011-07-23 17:15 Thomas Gleixner
0 siblings, 0 replies; only message in thread
From: Thomas Gleixner @ 2011-07-23 17:15 UTC (permalink / raw)
To: linux-arm-kernel
When a signal is delivered from do_notify_resume() __put_user() is
currently called with interrupts disabled.
When the access faults then the fault code trips over the interrupts
disabled check in might_sleep(). No biscuit!
Enable interrupts before calling do_notify_resume().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/arm/kernel/entry-common.S | 1 +
1 file changed, 1 insertion(+)
Index: linux-2.6/arch/arm/kernel/entry-common.S
===================================================================
--- linux-2.6.orig/arch/arm/kernel/entry-common.S
+++ linux-2.6/arch/arm/kernel/entry-common.S
@@ -49,6 +49,7 @@ work_pending:
bne work_resched
tst r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME
beq no_work_pending
+ enable_irq
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
tst r1, #_TIF_SIGPENDING @ delivering a signal?
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2011-07-23 17:15 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-07-23 17:15 [PATCH] arm: Call do_notify_resume() with interrupts enabled Thomas Gleixner
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox