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authorEugene Teo <eugeneteo@kernel.sg>2007-10-18 23:40:38 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:42 -0700
commit270f722d4d5f94b02fd48eed47e57917ab00a858 (patch)
treef6f58a0730c8968d2b4b983965b4409761616ab2
parentd85f50d5e1aa99ab082035f94265847521819e58 (diff)
downloadvexpress-lsk-270f722d4d5f94b02fd48eed47e57917ab00a858.tar.gz
Fix tsk->exit_state usage
tsk->exit_state can only be 0, EXIT_ZOMBIE, or EXIT_DEAD. A non-zero test is the same as tsk->exit_state & (EXIT_ZOMBIE | EXIT_DEAD), so just testing tsk->exit_state is sufficient. Signed-off-by: Eugene Teo <eugeneteo@kernel.sg> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/array.c3
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/sched.c2
3 files changed, 3 insertions, 4 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 04b689f3288..7a34571203b 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -146,8 +146,7 @@ static inline const char *get_task_state(struct task_struct *tsk)
TASK_UNINTERRUPTIBLE |
TASK_STOPPED |
TASK_TRACED)) |
- (tsk->exit_state & (EXIT_ZOMBIE |
- EXIT_DEAD));
+ tsk->exit_state;
const char **p = &task_state_array[0];
while (state) {
diff --git a/kernel/fork.c b/kernel/fork.c
index a794bfcf600..240aa6601f5 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -117,7 +117,7 @@ EXPORT_SYMBOL(free_task);
void __put_task_struct(struct task_struct *tsk)
{
- WARN_ON(!(tsk->exit_state & (EXIT_DEAD | EXIT_ZOMBIE)));
+ WARN_ON(!tsk->exit_state);
WARN_ON(atomic_read(&tsk->usage));
WARN_ON(tsk == current);
diff --git a/kernel/sched.c b/kernel/sched.c
index 72a809a54d5..9d458504e3a 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5279,7 +5279,7 @@ static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
struct rq *rq = cpu_rq(dead_cpu);
/* Must be exiting, otherwise would be on tasklist. */
- BUG_ON(p->exit_state != EXIT_ZOMBIE && p->exit_state != EXIT_DEAD);
+ BUG_ON(!p->exit_state);
/* Cannot have done final schedule yet: would have vanished. */
BUG_ON(p->state == TASK_DEAD);