From 4c36595ec87115f2f876f7d4fdec8ca284a42b9c Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Wed, 18 Jul 2012 19:15:25 +0100 Subject: ARM: 7468/1: ftrace: Trace function entry before updating index Commit 722b3c74695377d11d18a52f3da08114d37f3f37 modified x86 ftrace to avoid tracing all functions called from irqs when function graph was used with a filter. Port the same fix to ARM. Acked-by: Steven Rostedt Signed-off-by: Colin Cross Signed-off-by: Russell King --- arch/arm/kernel/ftrace.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index df0bf0c8cb7..34e56647dce 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -179,19 +179,20 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, old = *parent; *parent = return_hooker; - err = ftrace_push_return_trace(old, self_addr, &trace.depth, - frame_pointer); - if (err == -EBUSY) { - *parent = old; - return; - } - trace.func = self_addr; + trace.depth = current->curr_ret_stack + 1; /* Only trace if the calling function expects to */ if (!ftrace_graph_entry(&trace)) { - current->curr_ret_stack--; *parent = old; + return; + } + + err = ftrace_push_return_trace(old, self_addr, &trace.depth, + frame_pointer); + if (err == -EBUSY) { + *parent = old; + return; } } -- cgit v1.2.3-18-g5258