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powerpc/time: Fix tracing in time.c 

Since trace_clock is in a different file and already marked with notrace,
enable tracing in time.c by removing it from the disabled list in Makefile.
Also annotate clocksource read functions and sched_clock with notrace.

Testing: Timer and ftrace selftests run with different trace clocks.

Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Santosh Sivaraj 2017-06-20 13:14:47 +05:30 committed by Michael Ellerman
parent fd88b945c1
commit 6b847d795c
2 changed files with 3 additions and 5 deletions
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2
arch/powerpc/kernel/Makefile
View File

@ -25,8 +25,6 @@ CFLAGS_REMOVE_cputable.o = -mno-sched-epilog $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_prom_init.o = -mno-sched-epilog $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_btext.o = -mno-sched-epilog $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_prom.o = -mno-sched-epilog $(CC_FLAGS_FTRACE)
# timers used by tracing
CFLAGS_REMOVE_time.o = -mno-sched-epilog $(CC_FLAGS_FTRACE)
endif
obj-y := cputable.o ptrace.o syscalls.o \

6
arch/powerpc/kernel/time.c
View File

@ -675,7 +675,7 @@ EXPORT_SYMBOL_GPL(tb_to_ns);
* the high 64 bits of a * b, i.e. (a * b) >> 64, where a and b
* are 64-bit unsigned numbers.
*/
unsigned long long sched_clock(void)
notrace unsigned long long sched_clock(void)
{
if (__USE_RTC())
return get_rtc();
@ -831,12 +831,12 @@ void read_persistent_clock(struct timespec *ts)
}
/* clocksource code */
static u64 rtc_read(struct clocksource *cs)
static notrace u64 rtc_read(struct clocksource *cs)
{
return (u64)get_rtc();
}
static u64 timebase_read(struct clocksource *cs)
static notrace u64 timebase_read(struct clocksource *cs)
{
return (u64)get_tb();
}