[PATCH] splice: add direct fd <-> fd splicing support

[mirror_ubuntu-zesty-kernel.git] / kernel / exit.c

diff --git a/kernel/exit.c b/kernel/exit.c
index bc0ec674d3f4c4fde1332dacc7e436d63a81c5e5..1a9787ac61733abbc793c10c515347904a678bff 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -34,6 +34,7 @@
 #include <linux/mutex.h>
 #include <linux/futex.h>
 #include <linux/compat.h>
+#include <linux/pipe_fs_i.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -127,6 +128,11 @@ static void __exit_signal(struct task_struct *tsk)
        }
 }
 
+static void delayed_put_task_struct(struct rcu_head *rhp)
+{
+       put_task_struct(container_of(rhp, struct task_struct, rcu));
+}
+
 void release_task(struct task_struct * p)
 {
        int zap_leader;
@@ -168,7 +174,7 @@ repeat:
        spin_unlock(&p->proc_lock);
        proc_pid_flush(proc_dentry);
        release_thread(p);
-       put_task_struct(p);
+       call_rcu(&p->rcu, delayed_put_task_struct);
 
        p = leader;
        if (unlikely(zap_leader))
@@ -936,6 +942,9 @@ fastcall NORET_TYPE void do_exit(long code)
        if (tsk->io_context)
                exit_io_context();
 
+       if (tsk->splice_pipe)
+               __free_pipe_info(tsk->splice_pipe);
+
        /* PF_DEAD causes final put_task_struct after we schedule. */
        preempt_disable();
        BUG_ON(tsk->flags & PF_DEAD);