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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-03-28 12:57:40 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-04-03 16:50:13 +0100 |
| commit | 9b56febea22003c424f11248908b534eba0f1eeb (patch) | |
| tree | 136baa2d07413295ac71a873d4a10701a971d083 | |
| parent | 651e94995ed5c10d77adcf19edb9de7d6f0cac3e (diff) | |
| download | op-kernel-dev-9b56febea22003c424f11248908b534eba0f1eeb.zip op-kernel-dev-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>
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 27 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-header.S | 32 |
2 files changed, 31 insertions, 28 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 0f82098..68e41de 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -197,13 +197,6 @@ __dabt_svc: @ IRQs off again before pulling preserved data off the stack @ disable_irq_notrace - -#ifdef CONFIG_TRACE_IRQFLAGS - tst r5, #PSR_I_BIT - bleq trace_hardirqs_on - tst r5, #PSR_I_BIT - blne trace_hardirqs_off -#endif svc_exit r5 @ return from exception UNWIND(.fnend ) ENDPROC(__dabt_svc) @@ -223,12 +216,7 @@ __irq_svc: blne svc_preempt #endif -#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 - svc_exit r5 @ return from exception + svc_exit r5, irq = 1 @ return from exception UNWIND(.fnend ) ENDPROC(__irq_svc) @@ -305,12 +293,6 @@ __und_svc_finish: @ restore SPSR and restart the instruction @ ldr r5, [sp, #S_PSR] @ Get SVC cpsr -#ifdef CONFIG_TRACE_IRQFLAGS - tst r5, #PSR_I_BIT - bleq trace_hardirqs_on - tst r5, #PSR_I_BIT - blne trace_hardirqs_off -#endif svc_exit r5 @ return from exception UNWIND(.fnend ) ENDPROC(__und_svc) @@ -325,13 +307,6 @@ __pabt_svc: @ IRQs off again before pulling preserved data off the stack @ disable_irq_notrace - -#ifdef CONFIG_TRACE_IRQFLAGS - tst r5, #PSR_I_BIT - bleq trace_hardirqs_on - tst r5, #PSR_I_BIT - blne trace_hardirqs_off -#endif svc_exit r5 @ return from exception UNWIND(.fnend ) ENDPROC(__pabt_svc) diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index 9a8531e..0bf15e5 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 |
