[PATCH 6/7] s390: time: Provide read_boot_clock64() and read_persistent_clock64()

John Stultz
2015-05-20T17:20:07Z

From: Xunlei Pang <pang.xunlei@linaro.org>

As part of addressing "y2038 problem" for in-kernel uses, this
patch converts read_boot_clock() to read_boot_clock64() and
read_persistent_clock() to read_persistent_clock64() using
timespec64.

Rename some timespec to timespec64 in time.c and related references.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
arch/s390/include/asm/timex.h | 5 +++--
arch/s390/kernel/debug.c | 11 ++++++-----
arch/s390/kernel/time.c | 6 +++---
3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 98eb2a5..f39220f 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -10,6 +10,7 @@
#define _ASM_S390_TIMEX_H

#include <asm/lowcore.h>
+#include <linux/time64.h>

/* The value of the TOD clock for 1.1.1970. */
#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
@@ -108,10 +109,10 @@ int get_sync_clock(unsigned long long *clock);
void init_cpu_timer(void);
unsigned long long monotonic_clock(void);

-void tod_to_timeval(__u64, struct timespec *);
+void tod_to_timeval(__u64, struct timespec64 *);

static inline
-void stck_to_timespec(unsigned long long stck, struct timespec *ts)
+void stck_to_timespec64(unsigned long long stck, struct timespec64 *ts)
{
tod_to_timeval(stck - TOD_UNIX_EPOCH, ts);
}
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index c1f21ac..4f2d11d 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -1457,23 +1457,24 @@ int
debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
int area, debug_entry_t * entry, char *out_buf)
{
- struct timespec time_spec;
+ struct timespec64 time_spec;
char *except_str;
unsigned long caller;
int rc = 0;
unsigned int level;

level = entry->id.fields.level;
- stck_to_timespec(entry->id.stck, &time_spec);
+ stck_to_timespec64(entry->id.stck, &time_spec);

if (entry->id.fields.exception)
except_str = "*";
else
except_str = "-";
caller = ((unsigned long) entry->caller) & PSW_ADDR_INSN;
- rc += sprintf(out_buf, "%02i %011lu:%06lu %1u %1s %02i %p ",
- area, time_spec.tv_sec, time_spec.tv_nsec / 1000, level,
- except_str, entry->id.fields.cpuid, (void *) caller);
+ rc += sprintf(out_buf, "%02i %011lld:%06lu %1u %1s %02i %p ",
+ area, (long long) time_spec.tv_sec,
+ time_spec.tv_nsec / 1000, level, except_str,
+ entry->id.fields.cpuid, (void *) caller);
return rc;
}
EXPORT_SYMBOL(debug_dflt_header_fn);
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 170ddd2..9e733d9 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -76,7 +76,7 @@ unsigned long long monotonic_clock(void)
}
EXPORT_SYMBOL(monotonic_clock);

-void tod_to_timeval(__u64 todval, struct timespec *xt)
+void tod_to_timeval(__u64 todval, struct timespec64 *xt)
{
unsigned long long sec;

@@ -181,12 +181,12 @@ static void timing_alert_interrupt(struct ext_code ext_code,
static void etr_reset(void);
static void stp_reset(void);

-void read_persistent_clock(struct timespec *ts)
+void read_persistent_clock64(struct timespec64 *ts)
{
tod_to_timeval(get_tod_clock() - TOD_UNIX_EPOCH, ts);
}

-void read_boot_clock(struct timespec *ts)
+void read_boot_clock64(struct timespec64 *ts)
{
tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, ts);
}
--
1.9.1