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authorOleg Nesterov <oleg@redhat.com>2011-06-23 01:10:26 +0400
committerOleg Nesterov <oleg@redhat.com>2011-06-27 22:30:10 +0400
commit087806b1281563e4ae7a5bce3155f894af5f4118 (patch)
tree01547cd793de4e06f633293efa530a13ff2724a6 /fs/exec.c
parentd4f7c511c1c2a67eb287987cf1ce9554149030e6 (diff)
downloadlinux-087806b1281563e4ae7a5bce3155f894af5f4118.tar.xz
redefine thread_group_leader() as exit_signal >= 0
Change de_thread() to set old_leader->exit_signal = -1. This is good for the consistency, it is no longer the leader and all sub-threads have exit_signal = -1 set by copy_process(CLONE_THREAD). And this allows us to micro-optimize thread_group_leader(), it can simply check exit_signal >= 0. This also makes sense because we should move ->group_leader from task_struct to signal_struct. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 8dca45b0dae8..c3d517bfdd27 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -963,6 +963,7 @@ static int de_thread(struct task_struct *tsk)
leader->group_leader = tsk;
tsk->exit_signal = SIGCHLD;
+ leader->exit_signal = -1;
BUG_ON(leader->exit_state != EXIT_ZOMBIE);
leader->exit_state = EXIT_DEAD;