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time: Change posix clocks ops interfaces to use timespec64

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struct timespec is not y2038 safe on 32 bit machines.

The posix clocks apis use struct timespec directly and through struct
itimerspec.

Replace the posix clock interfaces to use struct timespec64 and struct
itimerspec64 instead.  Also fix up their implementations accordingly.

Note that the clock_getres() interface has also been changed to use
timespec64 even though this particular interface is not affected by the
y2038 problem. This helps verification for internal kernel code for y2038
readiness by getting rid of time_t/ timeval/ timespec.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: arnd@arndb.de
Cc: y2038@lists.linaro.org
Cc: netdev@vger.kernel.org
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: john.stultz@linaro.org
Link: http://lkml.kernel.org/r/1490555058-4603-3-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Deepa Dinamani 2017-03-26 12:04:13 -07:00 • committed by Thomas Gleixner
parent 2ac00f17b2
commit d340266e19
3 changed files with 36 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

34
kernel/time/posix-clock.c
View file

@ -300,14 +300,17 @@ out:
static int pc_clock_gettime(clockid_t id, struct timespec *ts)
{
struct posix_clock_desc cd;
struct timespec64 ts64;
int err;
err = get_clock_desc(id, &cd);
if (err)
return err;
if (cd.clk->ops.clock_gettime)
err = cd.clk->ops.clock_gettime(cd.clk, ts);
if (cd.clk->ops.clock_gettime) {
err = cd.clk->ops.clock_gettime(cd.clk, &ts64);
*ts = timespec64_to_timespec(ts64);
}
else
err = -EOPNOTSUPP;
@ -319,14 +322,17 @@ static int pc_clock_gettime(clockid_t id, struct timespec *ts)
static int pc_clock_getres(clockid_t id, struct timespec *ts)
{
struct posix_clock_desc cd;
struct timespec64 ts64;
int err;
err = get_clock_desc(id, &cd);
if (err)
return err;
if (cd.clk->ops.clock_getres)
err = cd.clk->ops.clock_getres(cd.clk, ts);
if (cd.clk->ops.clock_getres) {
err = cd.clk->ops.clock_getres(cd.clk, &ts64);
*ts = timespec64_to_timespec(ts64);
}
else
err = -EOPNOTSUPP;
@ -337,6 +343,7 @@ static int pc_clock_getres(clockid_t id, struct timespec *ts)
static int pc_clock_settime(clockid_t id, const struct timespec *ts)
{
struct timespec64 ts64 = timespec_to_timespec64(*ts);
struct posix_clock_desc cd;
int err;
@ -350,7 +357,7 @@ static int pc_clock_settime(clockid_t id, const struct timespec *ts)
}
if (cd.clk->ops.clock_settime)
err = cd.clk->ops.clock_settime(cd.clk, ts);
err = cd.clk->ops.clock_settime(cd.clk, &ts64);
else
err = -EOPNOTSUPP;
out:
@ -403,29 +410,36 @@ static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec *ts)
{
clockid_t id = kit->it_clock;
struct posix_clock_desc cd;
struct itimerspec64 ts64;
if (get_clock_desc(id, &cd))
return;
if (cd.clk->ops.timer_gettime)
cd.clk->ops.timer_gettime(cd.clk, kit, ts);
if (cd.clk->ops.timer_gettime) {
cd.clk->ops.timer_gettime(cd.clk, kit, &ts64);
*ts = itimerspec64_to_itimerspec(&ts64);
}
put_clock_desc(&cd);
}
static int pc_timer_settime(struct k_itimer *kit, int flags,
struct itimerspec *ts, struct itimerspec *old)
{
struct itimerspec64 ts64 = itimerspec_to_itimerspec64(ts);
clockid_t id = kit->it_clock;
struct posix_clock_desc cd;
struct itimerspec64 old64;
int err;
err = get_clock_desc(id, &cd);
if (err)
return err;
if (cd.clk->ops.timer_settime)
err = cd.clk->ops.timer_settime(cd.clk, kit, flags, ts, old);
if (cd.clk->ops.timer_settime) {
err = cd.clk->ops.timer_settime(cd.clk, kit, flags, &ts64, &old64);
if (old)
*old = itimerspec64_to_itimerspec(&old64);
}
else
err = -EOPNOTSUPP;