From bb380ec33a7d8ee048e722889627869d21a5d527 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 14 May 2017 21:33:21 -0400 Subject: [PATCH] kill wait_noreap_copyout() folds into callers Signed-off-by: Al Viro --- kernel/exit.c | 65 ++++++++++++++++++++------------------------------- 1 file changed, 25 insertions(+), 40 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index d4f5097da85a..f01ebaab978a 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -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 @@ unlock_sig: 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 @@ unlock_sig: infop->pid = pid; infop->uid = uid; } - put_task_struct(p); - - BUG_ON(!pid); return pid; } @@ -1324,7 +1309,7 @@ unlock_sig: */ 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; } /* -- 2.39.5