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Subject[PATCH 4/5] Use copy_wait_opts_to_user() in wait_task_zombie()
Date
All copy-paste getrusage() and put_user() code in wait_task_* functions
is replaced by call to copy_wait_opts_to_user()

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com>
---
kernel/exit.c | 39 +++++++++++----------------------------
1 files changed, 11 insertions(+), 28 deletions(-)
diff --git a/kernel/exit.c b/kernel/exit.c
index a742ae9..9806332 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1165,17 +1165,15 @@ static int wait_noreap_copyout(struct wait_opts *wo, struct task_struct *p,
static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
{
unsigned long state;
- int retval, status, traced;
+ int retval, why, status, traced;
pid_t pid = task_pid_vnr(p);
uid_t uid = __task_cred(p)->uid;
- struct siginfo __user *infop;

if (!likely(wo->wo_flags & WEXITED))
return 0;

if (unlikely(wo->wo_flags & WNOWAIT)) {
int exit_code = p->exit_code;
- int why, status;

get_task_struct(p);
read_unlock(&tasklist_lock);
@@ -1267,36 +1265,21 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
*/
read_unlock(&tasklist_lock);

- retval = wo->wo_rusage
- ? getrusage(p, RUSAGE_BOTH, wo->wo_rusage) : 0;
status = (p->signal->flags & SIGNAL_GROUP_EXIT)
? p->signal->group_exit_code : p->exit_code;
- if (!retval && wo->wo_stat)
+ if (wo->wo_stat)
retval = put_user(status, wo->wo_stat);

- infop = wo->wo_info;
- if (!retval && infop)
- retval = put_user(SIGCHLD, &infop->si_signo);
- if (!retval && infop)
- retval = put_user(0, &infop->si_errno);
- if (!retval && infop) {
- int why;
-
- if ((status & 0x7f) == 0) {
- why = CLD_EXITED;
- status >>= 8;
- } else {
- why = (status & 0x80) ? CLD_DUMPED : CLD_KILLED;
- status &= 0x7f;
- }
- retval = put_user((short)why, &infop->si_code);
- if (!retval)
- retval = put_user(status, &infop->si_status);
+ if ((status & 0x7f) == 0) {
+ why = CLD_EXITED;
+ status >>= 8;
+ } else {
+ why = (status & 0x80) ? CLD_DUMPED : CLD_KILLED;
+ status &= 0x7f;
}
- if (!retval && infop)
- retval = put_user(pid, &infop->si_pid);
- if (!retval && infop)
- retval = put_user(uid, &infop->si_uid);
+
+ retval = copy_wait_opts_to_user(wo, p, pid, uid, why, status, SIGCHLD);
+
if (!retval)
retval = pid;

--
1.6.2.2



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