Commit 4291b730 authored Jan 18, 2010 by Paul Mundt

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>

parent 3d467676

arch/sh/kernel/cpu/fpu.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,7 @@ void fpu_state_restore(struct pt_regs *regs)
		}

		if (!tsk_used_math(tsk)) {
		local_irq_enable();
		/*
		* does a slab alloc which can sleep
		*/
		@@ -66,6 +67,7 @@ void fpu_state_restore(struct pt_regs *regs)
		do_group_exit(SIGKILL);
		return;
		}
		local_irq_disable();
		}

		grab_fpu(regs);