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alpha: osf_sys.c: use timespec64 where appropriate 

Some of the syscall helper functions (do_utimes, poll_select_set_timeout,
core_sys_select) have changed over the past year or two to use
'timespec64' pointers rather than 'timespec'. This was fine on alpha,
since 64-bit architectures treat the two as the same type.

However, I'd like to change that behavior and make 'timespec64' a proper
type of its own even on 64-bit architectures, and that will introduce
harmless type mismatch warnings here.

Also, I'm trying to kill off the do_gettimeofday() helper in favor of
ktime_get() and related interfaces throughout the kernel.

This changes the get_tv32/put_tv32 helper functions to also take a
timespec64 argument rather than timeval, which allows us to simplify
some of the syscall helpers a bit and avoid the type warnings.

For the moment, wait4 and adjtimex are still better off with the old
behavior, so I'm adding a special put_tv_to_tv32() helper for those.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Arnd Bergmann 2017-11-08 16:02:14 +01:00 committed by Matt Turner
parent 645a05a72c
commit d437e0659f
1 changed files with 34 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
arch/alpha/kernel/osf_sys.c
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@ -950,18 +950,27 @@ struct itimerval32
};
static inline long
get_tv32(struct timeval *o, struct timeval32 __user *i)
get_tv32(struct timespec64 *o, struct timeval32 __user *i)
{
struct timeval32 tv;
if (copy_from_user(&tv, i, sizeof(struct timeval32)))
return -EFAULT;
o->tv_sec = tv.tv_sec;
o->tv_usec = tv.tv_usec;
o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
return 0;
}
static inline long
put_tv32(struct timeval32 __user *o, struct timeval *i)
put_tv32(struct timeval32 __user *o, struct timespec64 *i)
{
return copy_to_user(o, &(struct timeval32){
.tv_sec = i->tv_sec,
.tv_usec = i->tv_nsec / NSEC_PER_USEC},
sizeof(struct timeval32));
}
static inline long
put_tv_to_tv32(struct timeval32 __user *o, struct timeval *i)
{
return copy_to_user(o, &(struct timeval32){
.tv_sec = i->tv_sec,
@ -1004,9 +1013,10 @@ SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
struct timezone __user *, tz)
{
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (put_tv32(tv, &ktv))
struct timespec64 kts;
ktime_get_real_ts64(&kts);
if (put_tv32(tv, &kts))
return -EFAULT;
}
if (tz) {
@ -1019,22 +1029,19 @@ SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
struct timezone __user *, tz)
{
struct timespec64 kts64;
struct timespec kts;
struct timespec64 kts;
struct timezone ktz;
if (tv) {
if (get_tv32((struct timeval *)&kts, tv))
if (get_tv32(&kts, tv))
return -EFAULT;
kts.tv_nsec *= 1000;
kts64 = timespec_to_timespec64(kts);
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof(*tz)))
return -EFAULT;
}
return do_sys_settimeofday64(tv ? &kts64 : NULL, tz ? &ktz : NULL);
return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
}
asmlinkage long sys_ni_posix_timers(void);
@ -1083,22 +1090,16 @@ SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
struct timeval32 __user *, tvs)
{
struct timespec tv[2];
struct timespec64 tv[2];
if (tvs) {
struct timeval ktvs[2];
if (get_tv32(&ktvs[0], &tvs[0]) ||
get_tv32(&ktvs[1], &tvs[1]))
if (get_tv32(&tv[0], &tvs[0]) ||
get_tv32(&tv[1], &tvs[1]))
return -EFAULT;
if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
return -EINVAL;
tv[0].tv_sec = ktvs[0].tv_sec;
tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
tv[1].tv_sec = ktvs[1].tv_sec;
tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
}
return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
@ -1107,19 +1108,18 @@ SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
fd_set __user *, exp, struct timeval32 __user *, tvp)
{
struct timespec end_time, *to = NULL;
struct timespec64 end_time, *to = NULL;
if (tvp) {
struct timeval tv;
struct timespec64 tv;
to = &end_time;
if (get_tv32(&tv, tvp))
return -EFAULT;
if (tv.tv_sec < 0 || tv.tv_usec < 0)
if (tv.tv_sec < 0 || tv.tv_nsec < 0)
return -EINVAL;
if (poll_select_set_timeout(to, tv.tv_sec,
tv.tv_usec * NSEC_PER_USEC))
if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
return -EINVAL;
}
@ -1192,9 +1192,9 @@ SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
return -EFAULT;
if (!ur)
return err;
if (put_tv32(&ur->ru_utime, &r.ru_utime))
if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
return -EFAULT;
if (put_tv32(&ur->ru_stime, &r.ru_stime))
if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
return -EFAULT;
if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
@ -1210,18 +1210,18 @@ SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
struct timeval32 __user *, remain)
{
struct timeval tmp;
struct timespec64 tmp;
unsigned long ticks;
if (get_tv32(&tmp, sleep))
goto fault;
ticks = timeval_to_jiffies(&tmp);
ticks = timespec64_to_jiffies(&tmp);
ticks = schedule_timeout_interruptible(ticks);
if (remain) {
jiffies_to_timeval(ticks, &tmp);
jiffies_to_timespec64(ticks, &tmp);
if (put_tv32(remain, &tmp))
goto fault;
}
@ -1280,7 +1280,7 @@ SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
(copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
offsetof(struct timex32, tick))) ||
(put_tv32(&txc_p->time, &txc.time)))
(put_tv_to_tv32(&txc_p->time, &txc.time)))
return -EFAULT;
return ret;