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x86: Allow tracing of functions in arch/x86/kernel/rtc.c

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Move native_read_tsc() to tsc.c to allow profiling to be
re-enabled for rtc.c.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1349698050-6560-1-git-send-email-david.vrabel@citrix.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
David Vrabel 2012-10-08 13:07:30 +01:00 committed by Ingo Molnar
parent 3f3a206487
commit ce37f40033
3 changed files with 6 additions and 7 deletions
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1
arch/x86/kernel/Makefile
View File

@ -9,7 +9,6 @@ CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
ifdef CONFIG_FUNCTION_TRACER
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_rtc.o = -pg
CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
CFLAGS_REMOVE_pvclock.o = -pg
CFLAGS_REMOVE_kvmclock.o = -pg

6
arch/x86/kernel/rtc.c
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@ -195,12 +195,6 @@ void read_persistent_clock(struct timespec *ts)
ts->tv_nsec = 0;
}
unsigned long long native_read_tsc(void)
{
return __native_read_tsc();
}
EXPORT_SYMBOL(native_read_tsc);
static struct resource rtc_resources[] = {
[0] = {

6
arch/x86/kernel/tsc.c
View File

@ -77,6 +77,12 @@ unsigned long long
sched_clock(void) __attribute__((alias("native_sched_clock")));
#endif
unsigned long long native_read_tsc(void)
{
return __native_read_tsc();
}
EXPORT_SYMBOL(native_read_tsc);
int check_tsc_unstable(void)
{
return tsc_unstable;