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authorMichal Simek <monstr@monstr.eu>2009-11-16 09:55:08 +0100
committerMichal Simek <monstr@monstr.eu>2009-12-14 08:40:10 +0100
commit6d9e60ce30a1be35491c74df00aaa25d869f8a02 (patch)
tree6b7a709de5e9c46318d7b32ce0dc1205707de65f
parent2fd7c761a24c28e83d7194b4b4a099451126a503 (diff)
downloadlinux-linaro-stable-6d9e60ce30a1be35491c74df00aaa25d869f8a02.tar.gz
microblaze: ftrace: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST
Implement MCOUNT_TEST in asm code - it is faster than use generic code Signed-off-by: Michal Simek <monstr@monstr.eu>
-rw-r--r--arch/microblaze/Kconfig1
-rw-r--r--arch/microblaze/kernel/mcount.S5
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 18003ca08196..cccf3adfae50 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -7,6 +7,7 @@ config MICROBLAZE
def_bool y
select HAVE_LMB
select HAVE_FUNCTION_TRACER
+ select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select USB_ARCH_HAS_EHCI
select ARCH_WANT_OPTIONAL_GPIOLIB
diff --git a/arch/microblaze/kernel/mcount.S b/arch/microblaze/kernel/mcount.S
index a257a1b75ed2..97eef3eea944 100644
--- a/arch/microblaze/kernel/mcount.S
+++ b/arch/microblaze/kernel/mcount.S
@@ -85,6 +85,11 @@ ENTRY(ftrace_stub)
ENTRY(_mcount)
SAVE_REGS
swi r15, r1, 0;
+ /* MS: HAVE_FUNCTION_TRACE_MCOUNT_TEST begin of checking */
+ lwi r5, r0, function_trace_stop;
+ bneid r5, end;
+ nop;
+ /* MS: HAVE_FUNCTION_TRACE_MCOUNT_TEST end of checking */
/* MS: test function trace if is taken or not */
lwi r20, r0, ftrace_trace_function;
addik r6, r0, ftrace_stub;