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ARM: entry: instrument svc undefined exception handler with irqtrace

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Add irqtrace function calls to the undefined exception handler, so
that we get sane lockdep traces from locking problems in undefined
exception handlers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-06-25 16:55:58 +01:00
parent 02fe2845d6
commit df295df6c3
1 changed files with 10 additions and 0 deletions
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10
arch/arm/kernel/entry-armv.S
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@ -268,6 +268,10 @@ __und_svc:
svc_entry
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
bl trace_hardirqs_off
#endif
@
@ call emulation code, which returns using r9 if it has emulated
@ the instruction, or the more conventional lr if we are to treat
@ -300,6 +304,12 @@ __und_svc:
@ 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)