Re: [RFC patch 02/21] LTTng Kernel Trace Thread Flag ARM fix syscall exit

[Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>]

(sorry, forgot to pick this one from my tree in the original post)

Make sure we re-test the kernel trace thread flag at syscall exit even if we
were not tracing at syscall entry. This fixes syscall exit tracing early in the
trace.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
---
 arch/arm/kernel/entry-common.S |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-omap-2.6/arch/arm/kernel/entry-common.S
===================================================================
--- linux-omap-2.6.orig/arch/arm/kernel/entry-common.S	2009-02-21 16:31:10.000000000 +0000
+++ linux-omap-2.6/arch/arm/kernel/entry-common.S	2009-02-21 16:32:18.000000000 +0000
@@ -43,6 +43,8 @@
  * Ok, we need to do extra processing, enter the slow path.
  */
 fast_work_pending:
+	tst	r1, #_TIF_KERNEL_TRACE		@ flag can be set asynchronously
+	bne	__sys_trace_return
 	str	r0, [sp, #S_R0+S_OFF]!		@ returned r0
 work_pending:
 	tst	r1, #_TIF_NEED_RESCHED

-- 
Mathieu Desnoyers
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