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ntp: Move adjtimex related compat syscalls to native counterparts

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Get rid of set_fs() mess and sanitize compat_{get,put}_timex(),
while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170607084241.28657-9-viro@ZenIV.linux.org.uk
This commit is contained in:
Al Viro
2017-06-07 09:42:34 +01:00
committed by Thomas Gleixner
parent fb923c4a3c
commit 3a4d44b616
5 changed files with 106 additions and 88 deletions
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27
kernel/time/posix-timers.c
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@@ -1018,6 +1018,33 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
return err;
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock,
struct compat_timex __user *, utp)
{
const struct k_clock *kc = clockid_to_kclock(which_clock);
struct timex ktx;
int err;
if (!kc)
return -EINVAL;
if (!kc->clock_adj)
return -EOPNOTSUPP;
err = compat_get_timex(&ktx, utp);
if (err)
return err;
err = kc->clock_adj(which_clock, &ktx);
if (err >= 0)
err = compat_put_timex(utp, &ktx);
return err;
}
#endif
SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
struct timespec __user *, tp)
{