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microblaze: ftrace: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST

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Implement MCOUNT_TEST in asm code - it is faster than use
generic code

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2009-11-16 09:55:08 +01:00
parent 2fd7c761a2
commit 6d9e60ce30
2 changed files with 6 additions and 0 deletions
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1
arch/microblaze/Kconfig
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@ -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

5
arch/microblaze/kernel/mcount.S
View file

@ -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;