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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-05-14 18:30:50 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-13 13:59:42 +0200 |
| commit | 1a43738d057559e87e0036e25c33715d6eff11ed (patch) | |
| tree | ca64c950930c1b067603009ead5427e88549bb3e | |
| parent | 6eed5b7500dc3754dc4d24f328f02bed118adb89 (diff) | |
| download | lwn-1a43738d057559e87e0036e25c33715d6eff11ed.tar.gz lwn-1a43738d057559e87e0036e25c33715d6eff11ed.zip | |
ARC: Entry Handler tweaks: Simplify branch for in-kernel preemption
commit 147aece29b15051173eb1e767018135361cdba89 upstream.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arc/kernel/entry.S | 8 |
1 files changed, 2 insertions, 6 deletions
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] |