@@ -220,16 +220,12 @@ __irq_svc:
#ifdef CONFIG_TRACE_IRQFLAGS
bl trace_hardirqs_off
#endif
-#ifdef CONFIG_PREEMPT
- get_thread_info tsk
- ldr r8, [tsk, #TI_PREEMPT] @ get preempt count
- add r7, r8, #1 @ increment it
- str r7, [tsk, #TI_PREEMPT]
-#endif
irq_handler
+
#ifdef CONFIG_PREEMPT
- str r8, [tsk, #TI_PREEMPT] @ restore preempt count
+ get_thread_info tsk
+ ldr r8, [tsk, #TI_PREEMPT] @ get preempt count
ldr r0, [tsk, #TI_FLAGS] @ get flags
teq r8, #0 @ if preempt count != 0
movne r0, #0 @ force flags to 0
@@ -432,23 +428,8 @@ __irq_usr:
bl trace_hardirqs_off
#endif
- get_thread_info tsk
-#ifdef CONFIG_PREEMPT
- ldr r8, [tsk, #TI_PREEMPT] @ get preempt count
- add r7, r8, #1 @ increment it
- str r7, [tsk, #TI_PREEMPT]
-#endif
-
irq_handler
-#ifdef CONFIG_PREEMPT
- ldr r0, [tsk, #TI_PREEMPT]
- str r8, [tsk, #TI_PREEMPT]
- teq r0, r7
- ARM( strne r0, [r0, -r0] )
- THUMB( movne r0, #0 )
- THUMB( strne r0, [r0] )
-#endif
-
+ get_thread_info tsk
mov why, #0
b ret_to_user_from_irq
UNWIND(.fnend )
irq_enter() and irq_exit() already take care of the preempt_count handling for interrupts, which increment and decrement the hardirq bits of the preempt count. So we can remove the preempt count handing in our IRQ entry/exit assembly, like x86 did some 9 years ago. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> --- arch/arm/kernel/entry-armv.S | 27 ++++----------------------- 1 files changed, 4 insertions(+), 23 deletions(-)