exit: Use task_is_*
Also restructure the loop in do_wait()
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
diff --git a/kernel/exit.c b/kernel/exit.c
index 549c055..bfb1c0e 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -249,7 +249,7 @@
struct task_struct *p;
do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
- if (p->state != TASK_STOPPED)
+ if (!task_is_stopped(p))
continue;
retval = 1;
break;
@@ -614,7 +614,7 @@
p->parent = p->real_parent;
add_parent(p);
- if (p->state == TASK_TRACED) {
+ if (task_is_traced(p)) {
/*
* If it was at a trace stop, turn it into
* a normal stop since it's no longer being
@@ -1563,60 +1563,51 @@
}
allowed = 1;
- switch (p->state) {
- case TASK_TRACED:
- /*
- * When we hit the race with PTRACE_ATTACH,
- * we will not report this child. But the
- * race means it has not yet been moved to
- * our ptrace_children list, so we need to
- * set the flag here to avoid a spurious ECHILD
- * when the race happens with the only child.
- */
- flag = 1;
- if (!my_ptrace_child(p))
- continue;
- /*FALLTHROUGH*/
- case TASK_STOPPED:
+ if (task_is_stopped_or_traced(p)) {
/*
* It's stopped now, so it might later
* continue, exit, or stop again.
+ *
+ * When we hit the race with PTRACE_ATTACH, we
+ * will not report this child. But the race
+ * means it has not yet been moved to our
+ * ptrace_children list, so we need to set the
+ * flag here to avoid a spurious ECHILD when
+ * the race happens with the only child.
*/
flag = 1;
- if (!(options & WUNTRACED) &&
- !my_ptrace_child(p))
- continue;
+
+ if (!my_ptrace_child(p)) {
+ if (task_is_traced(p))
+ continue;
+ if (!(options & WUNTRACED))
+ continue;
+ }
+
retval = wait_task_stopped(p, ret == 2,
- (options & WNOWAIT),
- infop,
- stat_addr, ru);
+ (options & WNOWAIT), infop,
+ stat_addr, ru);
if (retval == -EAGAIN)
goto repeat;
if (retval != 0) /* He released the lock. */
goto end;
- break;
- default:
- // case EXIT_DEAD:
- if (p->exit_state == EXIT_DEAD)
+ } else if (p->exit_state == EXIT_DEAD) {
+ continue;
+ } else if (p->exit_state == EXIT_ZOMBIE) {
+ /*
+ * Eligible but we cannot release it yet:
+ */
+ if (ret == 2)
+ goto check_continued;
+ if (!likely(options & WEXITED))
continue;
- // case EXIT_ZOMBIE:
- if (p->exit_state == EXIT_ZOMBIE) {
- /*
- * Eligible but we cannot release
- * it yet:
- */
- if (ret == 2)
- goto check_continued;
- if (!likely(options & WEXITED))
- continue;
- retval = wait_task_zombie(
- p, (options & WNOWAIT),
- infop, stat_addr, ru);
- /* He released the lock. */
- if (retval != 0)
- goto end;
- break;
- }
+ retval = wait_task_zombie(p,
+ (options & WNOWAIT), infop,
+ stat_addr, ru);
+ /* He released the lock. */
+ if (retval != 0)
+ goto end;
+ } else {
check_continued:
/*
* It's running now, so it might later
@@ -1625,12 +1616,11 @@
flag = 1;
if (!unlikely(options & WCONTINUED))
continue;
- retval = wait_task_continued(
- p, (options & WNOWAIT),
- infop, stat_addr, ru);
+ retval = wait_task_continued(p,
+ (options & WNOWAIT), infop,
+ stat_addr, ru);
if (retval != 0) /* He released the lock. */
goto end;
- break;
}
}
if (!flag) {