powerpc/tm: Remove interrupt disable in __switch_to()
We currently turn IRQs off in __switch_to(0 but this is unnecessary as it's
already disabled in the caller.
This removes the IRQ disable but adds a check to make sure it is really off
in case this changes in future.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4d42c4d..75c2d10 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -597,12 +597,13 @@
struct task_struct *new)
{
struct thread_struct *new_thread, *old_thread;
- unsigned long flags;
struct task_struct *last;
#ifdef CONFIG_PPC_BOOK3S_64
struct ppc64_tlb_batch *batch;
#endif
+ WARN_ON(!irqs_disabled());
+
/* Back up the TAR across context switches.
* Note that the TAR is not available for use in the kernel. (To
* provide this, the TAR should be backed up/restored on exception
@@ -722,8 +723,6 @@
}
#endif /* CONFIG_PPC_BOOK3S_64 */
- local_irq_save(flags);
-
/*
* We can't take a PMU exception inside _switch() since there is a
* window where the kernel stack SLB and the kernel stack are out
@@ -743,8 +742,6 @@
}
#endif /* CONFIG_PPC_BOOK3S_64 */
- local_irq_restore(flags);
-
return last;
}