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powerpc: Fix lockdep IRQ tracing bug

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A small bogon sneaked into the ppc64 lockdep support.  A test is
branching slightly off causing a clobbered register value to
overwrite the irq state under some circumstances.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2008-08-15 17:11:31 +10:00 committed by Paul Mackerras
parent 9acd57ca74
commit 22b8f9ee4a
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/include/asm/irqflags.h
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@ -20,7 +20,7 @@
#define TRACE_ENABLE_INTS bl .trace_hardirqs_on
#define TRACE_DISABLE_INTS bl .trace_hardirqs_off
#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip) \
cmpdi en, 0; \
cmpdi en,0; \
bne 95f; \
stb en,PACASOFTIRQEN(r13); \
bl .trace_hardirqs_off; \
@ -29,7 +29,8 @@
li en,1;
#define TRACE_AND_RESTORE_IRQ(en) \
TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f); \
96: stb en,PACASOFTIRQEN(r13)
stb en,PACASOFTIRQEN(r13); \
96:
#else
#define TRACE_ENABLE_INTS
#define TRACE_DISABLE_INTS