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authorWu Zhangjin <wuzhangjin@gmail.com>2009-11-20 20:34:30 +0800
committerRalf Baechle <ralf@linux-mips.org>2009-12-17 01:57:22 +0000
commit69a7d1b3ec64786cfc8a16ef3e8585d1f93d3944 (patch)
tree543a4a531bb1e573984e8f855cd530748d05306d /arch/mips/kernel/mcount.S
parentd2bb0762993e11363d8343127516b8fe88f9006f (diff)
downloadlinux-69a7d1b3ec64786cfc8a16ef3e8585d1f93d3944.tar.gz
MIPS: Tracing: Enable HAVE_FUNCTION_TRACE_MCOUNT_TEST for MIPS
There is an exisiting common ftrace_test_stop_func() in kernel/trace/ftrace.c, which is used to check the global variable ftrace_trace_stop to determine whether stop the function tracing. This patch implepment the MIPS specific one to speedup the procedure. Thanks goes to Zhang Le for Cleaning it up. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Nicholas Mc Guire <der.herr@hofr.at> Cc: zhangfx@lemote.com Cc: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/673/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/mcount.S')
-rw-r--r--arch/mips/kernel/mcount.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index cebcc3c11305..cbb45edad464 100644
--- a/arch/mips/kernel/mcount.S
+++ b/arch/mips/kernel/mcount.S
@@ -59,6 +59,9 @@
.endm
NESTED(_mcount, PT_SIZE, ra)
+ lw t0, function_trace_stop
+ bnez t0, ftrace_stub
+ nop
PTR_LA t0, ftrace_stub
PTR_L t1, ftrace_trace_function /* Prepare t1 for (1) */
bne t0, t1, static_trace