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posix-timers: Move compat versions of clock_gettime/settime/getres

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Move them to the native implementations and get rid of the set_fs() hackery.

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/20170607084241.28657-13-viro@ZenIV.linux.org.uk
This commit is contained in:
Al Viro
2017-06-07 09:42:38 +01:00
committed by Thomas Gleixner
parent 54ad9c46c2
commit d822cdcce4
3 changed files with 115 additions and 55 deletions
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kernel/compat.c
-51
View File
@@ -598,57 +598,6 @@ COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock,
return sys_timer_create(which_clock, event, created_timer_id);
}
COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock,
struct compat_timespec __user *, tp)
{
long err;
mm_segment_t oldfs;
struct timespec ts;
if (compat_get_timespec(&ts, tp))
return -EFAULT;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_clock_settime(which_clock,
(struct timespec __user *) &ts);
set_fs(oldfs);
return err;
}
COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
struct compat_timespec __user *, tp)
{
long err;
mm_segment_t oldfs;
struct timespec ts;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_clock_gettime(which_clock,
(struct timespec __user *) &ts);
set_fs(oldfs);
if (!err && compat_put_timespec(&ts, tp))
return -EFAULT;
return err;
}
COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
struct compat_timespec __user *, tp)
{
long err;
mm_segment_t oldfs;
struct timespec ts;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_clock_getres(which_clock,
(struct timespec __user *) &ts);
set_fs(oldfs);
if (!err && tp && compat_put_timespec(&ts, tp))
return -EFAULT;
return err;
}
/*
* We currently only need the following fields from the sigevent
* structure: sigev_value, sigev_signo, sig_notify and (sometimes