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Merge f78e9de80f ("Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input") into android-mainline

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Steps on the way to 5.16-rc1

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I78a89c32422b0b415dff9682ec10f464846c2c66
This commit is contained in:
Greg Kroah-Hartman
2021-11-16 11:13:29 +01:00
parent 3ba5988e21 f78e9de80f
commit 64d2f9bc97
463 changed files with 8264 additions and 6888 deletions
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kernel/pid.c
+36
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@@ -540,6 +540,42 @@ struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags)
return pid;
}
/**
* pidfd_get_task() - Get the task associated with a pidfd
*
* @pidfd: pidfd for which to get the task
* @flags: flags associated with this pidfd
*
* Return the task associated with @pidfd. The function takes a reference on
* the returned task. The caller is responsible for releasing that reference.
*
* Currently, the process identified by @pidfd is always a thread-group leader.
* This restriction currently exists for all aspects of pidfds including pidfd
* creation (CLONE_PIDFD cannot be used with CLONE_THREAD) and pidfd polling
* (only supports thread group leaders).
*
* Return: On success, the task_struct associated with the pidfd.
* On error, a negative errno number will be returned.
*/
struct task_struct *pidfd_get_task(int pidfd, unsigned int *flags)
{
unsigned int f_flags;
struct pid *pid;
struct task_struct *task;
pid = pidfd_get_pid(pidfd, &f_flags);
if (IS_ERR(pid))
return ERR_CAST(pid);
task = get_pid_task(pid, PIDTYPE_TGID);
put_pid(pid);
if (!task)
return ERR_PTR(-ESRCH);
*flags = f_flags;
return task;
}
/**
* pidfd_create() - Create a new pid file descriptor.
*