[PATCH v2] arm64: Fix task tracing

From: Christopher Covington
Date: Tue Apr 09 2013 - 08:34:04 EST


For accurate accounting pass contextidr_thread_switch the prev
task pointer, since cpu_switch_to has at that point changed the
the stack pointer.

Signed-off-by: Christopher Covington <cov@xxxxxxxxxxxxxx>
---
arch/arm64/kernel/process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 0337cdb..a49b25a 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -315,7 +315,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
/* the actual thread switch */
last = cpu_switch_to(prev, next);

- contextidr_thread_switch(next);
+ contextidr_thread_switch(prev);
return last;
}

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