[tip:timers/core] posix-stubs: Use get_timespec64() and put_timespec64()

[tip-bot for Arnd Bergmann]

Commit-ID:  fe460423438b62eb7440d994ab19a9f444e6280d
Gitweb:     https://git.kernel.org/tip/fe460423438b62eb7440d994ab19a9f444e6280d
Author:     Arnd Bergmann <a...@arndb.de>
AuthorDate: Fri, 13 Oct 2017 20:29:38 +0200
Committer:  Thomas Gleixner <t...@linutronix.de>
CommitDate: Tue, 17 Oct 2017 17:22:27 +0200

posix-stubs: Use get_timespec64() and put_timespec64()

This is a follow-up to commit 5c4994102fb5 ("posix-timers: Use
get_timespec64() and put_timespec64()"), which left two system call using
copy_from_user()/copy_to_user().

Change them as well for consistency.

Signed-off-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Acked-by: Nicolas Pitre <nicolas.pi...@linaro.org>
Cc: y2...@lists.linaro.org
Cc: John Stultz <john.stu...@linaro.org>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Cc: Deepa Dinamani <deepa.ker...@gmail.com>
Link: https://lkml.kernel.org/r/20171013183009.3442318-1-a...@arndb.de

---
 kernel/time/posix-stubs.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index 06f34fe..b258bee 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -117,8 +117,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, 
which_clock, int, flags,
                const struct timespec __user *, rqtp,
                struct timespec __user *, rmtp)
 {
-       struct timespec64 t64;
-       struct timespec t;
+       struct timespec64 t;
 
        switch (which_clock) {
        case CLOCK_REALTIME:
@@ -129,16 +128,15 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, 
which_clock, int, flags,
                return -EINVAL;
        }
 
-       if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
+       if (get_timespec64(&t, rqtp))
                return -EFAULT;
-       t64 = timespec_to_timespec64(t);
-       if (!timespec64_valid(&t64))
+       if (!timespec64_valid(&t))
                return -EINVAL;
        if (flags & TIMER_ABSTIME)
                rmtp = NULL;
        current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE;
        current->restart_block.nanosleep.rmtp = rmtp;
-       return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ?
+       return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
                                 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
                                 which_clock);
 }
@@ -203,8 +201,7 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, 
which_clock, int, flags,
                       struct compat_timespec __user *, rqtp,
                       struct compat_timespec __user *, rmtp)
 {
-       struct timespec64 t64;
-       struct timespec t;
+       struct timespec64 t;
 
        switch (which_clock) {
        case CLOCK_REALTIME:
@@ -215,16 +212,15 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, 
which_clock, int, flags,
                return -EINVAL;
        }
 
-       if (compat_get_timespec(&t, rqtp))
+       if (compat_get_timespec64(&t, rqtp))
                return -EFAULT;
-       t64 = timespec_to_timespec64(t);
-       if (!timespec64_valid(&t64))
+       if (!timespec64_valid(&t))
                return -EINVAL;
        if (flags & TIMER_ABSTIME)
                rmtp = NULL;
        current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE;
        current->restart_block.nanosleep.compat_rmtp = rmtp;
-       return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ?
+       return hrtimer_nanosleep(&t, flags & TIMER_ABSTIME ?
                                 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
                                 which_clock);
 }