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>
git-mirror · Dec 14, 2009 · 6d9e60c · 6d9e60c
1 parent 2fd7c76
commit 6d9e60c
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 0 deletions.
diff --git 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
@@ -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;