diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-06-07 09:42:36 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-06-14 00:00:43 +0200 |
| commit | b0dc12426ec404de99d7e75a12a22d9201d90914 (patch) | |
| tree | 60927afef817fa4364bcc4e6206f6a4c1624e53c /kernel | |
| parent | 1acbe7708b0313b33287bb4ffcbf26462ea3c588 (diff) | |
posix-timers: Take compat timer_gettime(2) to native one
... and get rid of set_fs() in there
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/20170607084241.28657-11-viro@ZenIV.linux.org.uk
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/compat.c | 17 | ||||
| -rw-r--r-- | kernel/time/posix-stubs.c | 1 | ||||
| -rw-r--r-- | kernel/time/posix-timers.c | 43 |
3 files changed, 35 insertions, 26 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index df39e2e00c47..1fb8cf7e691e 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -635,23 +635,6 @@ COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, return sys_timer_create(which_clock, event, created_timer_id); } -COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, - struct compat_itimerspec __user *, setting) -{ - long err; - mm_segment_t oldfs; - struct itimerspec ts; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_timer_gettime(timer_id, - (struct itimerspec __user *) &ts); - set_fs(oldfs); - if (!err && put_compat_itimerspec(setting, &ts)) - return -EFAULT; - return err; -} - COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock, struct compat_timespec __user *, tp) { diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index ad263df132d6..f4a1962d1729 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -43,6 +43,7 @@ SYS_NI(alarm); #endif COMPAT_SYS_NI(clock_adjtime); COMPAT_SYS_NI(timer_settime); +COMPAT_SYS_NI(timer_gettime); /* * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a73feac191f9..e82bb1fd614e 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -690,11 +690,8 @@ void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) } /* Get the time remaining on a POSIX.1b interval timer. */ -SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, - struct itimerspec __user *, setting) +static int do_timer_gettime(timer_t timer_id, struct itimerspec64 *setting) { - struct itimerspec64 cur_setting64; - struct itimerspec cur_setting; struct k_itimer *timr; const struct k_clock *kc; unsigned long flags; @@ -704,21 +701,49 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, if (!timr) return -EINVAL; - memset(&cur_setting64, 0, sizeof(cur_setting64)); + memset(setting, 0, sizeof(*setting)); kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_get)) ret = -EINVAL; else - kc->timer_get(timr, &cur_setting64); + kc->timer_get(timr, setting); unlock_timer(timr, flags); + return ret; +} - cur_setting = itimerspec64_to_itimerspec(&cur_setting64); - if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting))) - return -EFAULT; +/* Get the time remaining on a POSIX.1b interval timer. */ +SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct itimerspec __user *, setting) +{ + struct itimerspec64 cur_setting64; + int ret = do_timer_gettime(timer_id, &cur_setting64); + if (!ret) { + struct itimerspec cur_setting; + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); + if (copy_to_user(setting, &cur_setting, sizeof (cur_setting))) + ret = -EFAULT; + } + return ret; +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct compat_itimerspec __user *, setting) +{ + struct itimerspec64 cur_setting64; + + int ret = do_timer_gettime(timer_id, &cur_setting64); + if (!ret) { + struct itimerspec cur_setting; + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); + if (put_compat_itimerspec(setting, &cur_setting)) + ret = -EFAULT; + } return ret; } +#endif /* * Get the number of overruns of a POSIX.1b interval timer. This is to |