From: Vineet Gupta Date: Tue, 14 May 2013 13:00:50 +0000 (+0530) Subject: ARC: Entry Handler tweaks: Simplify branch for in-kernel preemption X-Git-Tag: firefly_0821_release~3679^2~2370 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1a43738d057559e87e0036e25c33715d6eff11ed;p=firefly-linux-kernel-4.4.55.git ARC: Entry Handler tweaks: Simplify branch for in-kernel preemption commit 147aece29b15051173eb1e767018135361cdba89 upstream. Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 6dbe359c760d..922150e153ea 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -589,11 +589,7 @@ ARC_ENTRY ret_from_exception ; Pre-{IRQ,Trap,Exception} K/U mode from pt_regs->status32 ld r8, [sp, PT_status32] ; returning to User/Kernel Mode -#ifdef CONFIG_PREEMPT bbit0 r8, STATUS_U_BIT, resume_kernel_mode -#else - bbit0 r8, STATUS_U_BIT, restore_regs -#endif ; Before returning to User mode check-for-and-complete any pending work ; such as rescheduling/signal-delivery etc. @@ -653,10 +649,10 @@ resume_user_mode_begin: b resume_user_mode_begin ; unconditionally back to U mode ret chks ; for single exit point from this block -#ifdef CONFIG_PREEMPT - resume_kernel_mode: +#ifdef CONFIG_PREEMPT + ; Can't preempt if preemption disabled GET_CURR_THR_INFO_FROM_SP r10 ld r8, [r10, THREAD_INFO_PREEMPT_COUNT]