AcoSail/kernel_optimize_test
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kill wait_noreap_copyout()

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folds into callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-05-14 21:33:21 -04:00
parent e61a250229
commit bb380ec33a
1 changed files with 25 additions and 40 deletions
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65
kernel/exit.c
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@ -1057,22 +1057,6 @@ eligible_child(struct wait_opts *wo, bool ptrace, struct task_struct *p)
return 1;
}
static int wait_noreap_copyout(struct wait_opts *wo, struct task_struct *p,
pid_t pid, uid_t uid, int why, int status)
{
struct waitid_info *infop;
put_task_struct(p);
infop = wo->wo_info;
if (infop) {
infop->cause = why;
infop->pid = pid;
infop->uid = uid;
infop->status = status;
}
return pid;
}
/*
* Handle sys_wait4 work for one task in state EXIT_ZOMBIE. We hold
* read_lock(&tasklist_lock) on entry. If we return zero, we still hold
@ -1091,22 +1075,27 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
if (unlikely(wo->wo_flags & WNOWAIT)) {
int exit_code = p->exit_code;
int why;
get_task_struct(p);
read_unlock(&tasklist_lock);
sched_annotate_sleep();
if (wo->wo_rusage)
getrusage(p, RUSAGE_BOTH, wo->wo_rusage);
put_task_struct(p);
if ((exit_code & 0x7f) == 0) {
why = CLD_EXITED;
status = exit_code >> 8;
} else {
why = (exit_code & 0x80) ? CLD_DUMPED : CLD_KILLED;
status = exit_code & 0x7f;
infop = wo->wo_info;
if (infop) {
if ((exit_code & 0x7f) == 0) {
infop->cause = CLD_EXITED;
infop->status = exit_code >> 8;
} else {
infop->cause = (exit_code & 0x80) ? CLD_DUMPED : CLD_KILLED;
infop->status = exit_code & 0x7f;
}
infop->pid = pid;
infop->uid = uid;
}
return wait_noreap_copyout(wo, p, pid, uid, why, status);
return pid;
}
/*
* Move the task's state to DEAD/TRACE, only one thread can do this.
@ -1297,11 +1286,10 @@ static int wait_task_stopped(struct wait_opts *wo,
sched_annotate_sleep();
if (wo->wo_rusage)
getrusage(p, RUSAGE_BOTH, wo->wo_rusage);
put_task_struct(p);
if (unlikely(wo->wo_flags & WNOWAIT))
return wait_noreap_copyout(wo, p, pid, uid, why, exit_code);
wo->wo_stat = (exit_code << 8) | 0x7f;
if (likely(!(wo->wo_flags & WNOWAIT)))
wo->wo_stat = (exit_code << 8) | 0x7f;
infop = wo->wo_info;
if (infop) {
@ -1310,9 +1298,6 @@ static int wait_task_stopped(struct wait_opts *wo,
infop->pid = pid;
infop->uid = uid;
}
put_task_struct(p);
BUG_ON(!pid);
return pid;
}
@ -1324,7 +1309,7 @@ static int wait_task_stopped(struct wait_opts *wo,
*/
static int wait_task_continued(struct wait_opts *wo, struct task_struct *p)
{
int retval;
struct waitid_info *infop;
pid_t pid;
uid_t uid;
@ -1351,18 +1336,18 @@ static int wait_task_continued(struct wait_opts *wo, struct task_struct *p)
sched_annotate_sleep();
if (wo->wo_rusage)
getrusage(p, RUSAGE_BOTH, wo->wo_rusage);
put_task_struct(p);
if (!wo->wo_info) {
put_task_struct(p);
infop = wo->wo_info;
if (!infop) {
wo->wo_stat = 0xffff;
retval = pid;
} else {
retval = wait_noreap_copyout(wo, p, pid, uid,
CLD_CONTINUED, SIGCONT);
BUG_ON(retval == 0);
infop->cause = CLD_CONTINUED;
infop->pid = pid;
infop->uid = uid;
infop->status = SIGCONT;
}
return retval;
return pid;
}
/*