y at monstr
Nov 23, 2009, 12:41 AM
Post #1 of 1
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[PATCH 2/5] microblaze: ftrace: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST
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From: Michal Simek <monstr [at] monstr>
Implement MCOUNT_TEST in asm code - it is faster than use
generic code
Signed-off-by: Michal Simek <monstr [at] monstr>
---
arch/microblaze/Kconfig | 1 +
arch/microblaze/kernel/mcount.S | 5 +++++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 18003ca..cccf3ad 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 a257a1b..97eef3e 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;
--
1.5.5.1
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