sh: Need IRQs enabled for init_fpu().
This tosses in a local_irq_enable()/disable() pair around the init_fpu()
callsite in the FPU state restore exception handler. Fixes up a slab BUG
triggered by making a slab cache allocation that can sleep whilst
irqs_disabled(). This follows the behaviour undertaken by the x86
implementation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/cpu/fpu.c b/arch/sh/kernel/cpu/fpu.c
index c23e672..f059ed6 100644
--- a/arch/sh/kernel/cpu/fpu.c
+++ b/arch/sh/kernel/cpu/fpu.c
@@ -56,6 +56,7 @@
}
if (!tsk_used_math(tsk)) {
+ local_irq_enable();
/*
* does a slab alloc which can sleep
*/
@@ -66,6 +67,7 @@
do_group_exit(SIGKILL);
return;
}
+ local_irq_disable();
}
grab_fpu(regs);