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authorMike Rapoport <rppt@linux.vnet.ibm.com>2018-02-06 15:40:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-06 18:32:46 -0800
commit2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3 (patch)
treebb2dc8915be7e4f0fea7438edf380d84b896f80a /kernel/pid.c
parenteab216e9cc636c24cec06bdf57a80f4c26b34493 (diff)
downloadlinux-2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3.tar.bz2
pids: introduce find_get_task_by_vpid() helper
There are several functions that do find_task_by_vpid() followed by get_task_struct(). We can use a helper function instead. Link: http://lkml.kernel.org/r/1509602027-11337-1-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/pid.c')
-rw-r--r--kernel/pid.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index 5d30c87e3c42..ed6c343fe50d 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -343,6 +343,19 @@ struct task_struct *find_task_by_vpid(pid_t vnr)
return find_task_by_pid_ns(vnr, task_active_pid_ns(current));
}
+struct task_struct *find_get_task_by_vpid(pid_t nr)
+{
+ struct task_struct *task;
+
+ rcu_read_lock();
+ task = find_task_by_vpid(nr);
+ if (task)
+ get_task_struct(task);
+ rcu_read_unlock();
+
+ return task;
+}
+
struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
{
struct pid *pid;