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y2038: ipc: Use ktime_get_real_seconds consistently 

In some places, we still used get_seconds() instead of
ktime_get_real_seconds(), and I'm changing the remaining ones now to
all use ktime_get_real_seconds() so we use the full available range for
timestamps instead of overflowing the 'unsigned long' return value in
year 2106 on 32-bit kernels.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2018-04-12 15:19:44 +02:00
parent b497ef570e
commit 2a70b7879b
2 changed files with 6 additions and 6 deletions
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6
ipc/msg.c
View File

@ -758,7 +758,7 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg,
WRITE_ONCE(msr->r_msg, ERR_PTR(-E2BIG));
} else {
ipc_update_pid(&msq->q_lrpid, task_pid(msr->r_tsk));
msq->q_rtime = get_seconds();
msq->q_rtime = ktime_get_real_seconds();
wake_q_add(wake_q, msr->r_tsk);
WRITE_ONCE(msr->r_msg, msg);
@ -859,7 +859,7 @@ static long do_msgsnd(int msqid, long mtype, void __user *mtext,
}
ipc_update_pid(&msq->q_lspid, task_tgid(current));
msq->q_stime = get_seconds();
msq->q_stime = ktime_get_real_seconds();
if (!pipelined_send(msq, msg, &wake_q)) {
/* no one is waiting for this message, enqueue it */
@ -1087,7 +1087,7 @@ static long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, in
list_del(&msg->m_list);
msq->q_qnum--;
msq->q_rtime = get_seconds();
msq->q_rtime = ktime_get_real_seconds();
ipc_update_pid(&msq->q_lrpid, task_tgid(current));
msq->q_cbytes -= msg->m_ts;
atomic_sub(msg->m_ts, &ns->msg_bytes);

6
ipc/sem.c
View File

@ -104,7 +104,7 @@ struct sem {
/* that alter the semaphore */
struct list_head pending_const; /* pending single-sop operations */
/* that do not alter the semaphore*/
time_t sem_otime; /* candidate for sem_otime */
time64_t sem_otime; /* candidate for sem_otime */
} ____cacheline_aligned_in_smp;
/* One sem_array data structure for each set of semaphores in the system. */
@ -984,10 +984,10 @@ again:
static void set_semotime(struct sem_array *sma, struct sembuf *sops)
{
if (sops == NULL) {
sma->sems[0].sem_otime = get_seconds();
sma->sems[0].sem_otime = ktime_get_real_seconds();
} else {
sma->sems[sops[0].sem_num].sem_otime =
get_seconds();
ktime_get_real_seconds();
}
}