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| author |   Deepa Dinamani <deepa.kernel@gmail.com> | 2017-06-24 11:45:06 -0700 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2017-06-30 04:14:14 -0400 |
| commit | c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0 (patch) | |
| tree | 9c670f99b106a03963fa9a2bc606617cd0958497 /kernel/time/hrtimer.c | |
| parent | posix-timers: Use get_timespec64() and put_timespec64() (diff) | |
| download | linux-dev-c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0.tar.xz linux-dev-c0edd7c9acd0eaee149ab6cb4441cc71a1af87f0.zip | |
nanosleep: Use get_timespec64() and put_timespec64()
Usage of these apis and their compat versions makes
the syscalls: clock_nanosleep and nanosleep and
their compat implementations simpler.
This is a preparatory patch to isolate data conversions to
struct timespec64 at userspace boundaries. This helps contain
the changes needed to transition to new y2038 safe types.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/time/hrtimer.c')
| -rw-r--r-- | kernel/time/hrtimer.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 81da124f1115..88f75f92ef36 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1440,17 +1440,17 @@ void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task) } EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); -int nanosleep_copyout(struct restart_block *restart, struct timespec *ts) +int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts) { switch(restart->nanosleep.type) { #ifdef CONFIG_COMPAT case TT_COMPAT: - if (compat_put_timespec(ts, restart->nanosleep.compat_rmtp)) + if (compat_put_timespec64(ts, restart->nanosleep.compat_rmtp)) return -EFAULT; break; #endif case TT_NATIVE: - if (copy_to_user(restart->nanosleep.rmtp, ts, sizeof(struct timespec))) + if (put_timespec64(ts, restart->nanosleep.rmtp)) return -EFAULT; break; default: @@ -1485,11 +1485,11 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod restart = ¤t->restart_block; if (restart->nanosleep.type != TT_NONE) { ktime_t rem = hrtimer_expires_remaining(&t->timer); - struct timespec rmt; + struct timespec64 rmt; if (rem <= 0) return 0; - rmt = ktime_to_timespec(rem); + rmt = ktime_to_timespec64(rem); return nanosleep_copyout(restart, &rmt); } @@ -1546,19 +1546,17 @@ out: SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, struct timespec __user *, rmtp) { - struct timespec64 tu64; - struct timespec tu; + struct timespec64 tu; - if (copy_from_user(&tu, rqtp, sizeof(tu))) + if (get_timespec64(&tu, rqtp)) return -EFAULT; - tu64 = timespec_to_timespec64(tu); - if (!timespec64_valid(&tu64)) + if (!timespec64_valid(&tu)) return -EINVAL; current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; - return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } #ifdef CONFIG_COMPAT @@ -1566,19 +1564,17 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp, struct compat_timespec __user *, rmtp) { - struct timespec64 tu64; - struct timespec tu; + struct timespec64 tu; - if (compat_get_timespec(&tu, rqtp)) + if (compat_get_timespec64(&tu, rqtp)) return -EFAULT; - tu64 = timespec_to_timespec64(tu); - if (!timespec64_valid(&tu64)) + if (!timespec64_valid(&tu)) return -EINVAL; current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; current->restart_block.nanosleep.compat_rmtp = rmtp; - return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } #endif |