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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-03-28 12:57:40 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-04-03 16:50:13 +0100
commit9b56febea22003c424f11248908b534eba0f1eeb (patch)
tree136baa2d07413295ac71a873d4a10701a971d083 /arch/arm/kernel/entry-header.S
parent651e94995ed5c10d77adcf19edb9de7d6f0cac3e (diff)
downloadlinux-linaro-stable-9b56febea22003c424f11248908b534eba0f1eeb.tar.gz
ARM: entry: move IRQ tracing exit into svc_exit
The IRQ tracing exit path is much the same between all SVC mode exits, so move this into the svc_exit macro. Use a macro parameter to identify the IRQ case, which is the only different case there is. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/entry-header.S')
-rw-r--r--arch/arm/kernel/entry-header.S32
1 files changed, 30 insertions, 2 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 9a8531eadd3d..0bf15e5c40a2 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -74,7 +74,21 @@
.endm
#ifndef CONFIG_THUMB2_KERNEL
- .macro svc_exit, rpsr
+ .macro svc_exit, rpsr, irq = 0
+ .if \irq != 0
+#ifdef CONFIG_TRACE_IRQFLAGS
+ @ The parent context IRQs must have been enabled to get here in
+ @ the first place, so there's no point checking the PSR I bit.
+ bl trace_hardirqs_on
+#endif
+ .else
+#ifdef CONFIG_TRACE_IRQFLAGS
+ tst \rpsr, #PSR_I_BIT
+ bleq trace_hardirqs_on
+ tst \rpsr, #PSR_I_BIT
+ blne trace_hardirqs_off
+#endif
+ .endif
msr spsr_cxsf, \rpsr
#if defined(CONFIG_CPU_V6)
ldr r0, [sp]
@@ -120,7 +134,21 @@
mov pc, \reg
.endm
#else /* CONFIG_THUMB2_KERNEL */
- .macro svc_exit, rpsr
+ .macro svc_exit, rpsr, irq = 0
+ .if \irq != 0
+#ifdef CONFIG_TRACE_IRQFLAGS
+ @ The parent context IRQs must have been enabled to get here in
+ @ the first place, so there's no point checking the PSR I bit.
+ bl trace_hardirqs_on
+#endif
+ .else
+#ifdef CONFIG_TRACE_IRQFLAGS
+ tst \rpsr, #PSR_I_BIT
+ bleq trace_hardirqs_on
+ tst \rpsr, #PSR_I_BIT
+ blne trace_hardirqs_off
+#endif
+ .endif
ldr lr, [sp, #S_SP] @ top of the stack
ldrd r0, r1, [sp, #S_LR] @ calling lr and pc
clrex @ clear the exclusive monitor