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authorAl Viro <viro@zeniv.linux.org.uk>2017-07-09 10:50:14 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-15 20:46:47 -0400
commit44ee454670122a959112caaa7aad86d8cacab1ff (patch)
treea1aa8a5a005186669761f206240d8a72b4fb7e1e /ipc/sem.c
parentshmat(2): move compat to native (diff)
downloadlinux-dev-44ee454670122a959112caaa7aad86d8cacab1ff.tar.xz
linux-dev-44ee454670122a959112caaa7aad86d8cacab1ff.zip
semtimedop(): move compat to native
... and finally kill the sodding compat_convert_timespec() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc/sem.c')
-rw-r--r--ipc/sem.c44
1 files changed, 33 insertions, 11 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index fcf064d6046a..6b832b7fa9fc 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1855,8 +1855,8 @@ out:
return un;
}
-SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
- unsigned, nsops, const struct timespec __user *, timeout)
+static long do_semtimedop(int semid, struct sembuf __user *tsops,
+ unsigned nsops, const struct timespec *timeout)
{
int error = -EINVAL;
struct sem_array *sma;
@@ -1887,17 +1887,12 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
}
if (timeout) {
- struct timespec _timeout;
- if (copy_from_user(&_timeout, timeout, sizeof(*timeout))) {
- error = -EFAULT;
- goto out_free;
- }
- if (_timeout.tv_sec < 0 || _timeout.tv_nsec < 0 ||
- _timeout.tv_nsec >= 1000000000L) {
+ if (timeout->tv_sec < 0 || timeout->tv_nsec < 0 ||
+ timeout->tv_nsec >= 1000000000L) {
error = -EINVAL;
goto out_free;
}
- jiffies_left = timespec_to_jiffies(&_timeout);
+ jiffies_left = timespec_to_jiffies(timeout);
}
max = 0;
@@ -2112,10 +2107,37 @@ out_free:
return error;
}
+SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,
+ unsigned, nsops, const struct timespec __user *, timeout)
+{
+ if (timeout) {
+ struct timespec ts;
+ if (copy_from_user(&ts, timeout, sizeof(*timeout)))
+ return -EFAULT;
+ return do_semtimedop(semid, tsops, nsops, &ts);
+ }
+ return do_semtimedop(semid, tsops, nsops, NULL);
+}
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
+ unsigned, nsops,
+ const struct compat_timespec __user *, timeout)
+{
+ if (timeout) {
+ struct timespec ts;
+ if (compat_get_timespec(&ts, timeout))
+ return -EFAULT;
+ return do_semtimedop(semid, tsems, nsops, &ts);
+ }
+ return do_semtimedop(semid, tsems, nsops, NULL);
+}
+#endif
+
SYSCALL_DEFINE3(semop, int, semid, struct sembuf __user *, tsops,
unsigned, nsops)
{
- return sys_semtimedop(semid, tsops, nsops, NULL);
+ return do_semtimedop(semid, tsops, nsops, NULL);
}
/* If CLONE_SYSVSEM is set, establish sharing of SEM_UNDO state between