pid: move pidfd_get_pid() to pid.c

process_madvise syscall needs pidfd_get_pid function to translate pidfd to
pid so this patch move the function to kernel/pid.c.

Suggested-by: Alexander Duyck <[email protected]>
Signed-off-by: Minchan Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Suren Baghdasaryan <[email protected]>
Reviewed-by: Alexander Duyck <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Brian Geffon <[email protected]>
Cc: Daniel Colascione <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: John Dias <[email protected]>
Cc: Kirill Tkhai <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Oleksandr Natalenko <[email protected]>
Cc: Sandeep Patil <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Sonny Rao <[email protected]>
Cc: Tim Murray <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Florian Weimer <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/pid.h b/include/linux/pid.h
index 176d6cf80e7c..fa10acb8d6a4 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -77,6 +77,7 @@ extern const struct file_operations pidfd_fops;
 struct file;
 
 extern struct pid *pidfd_pid(const struct file *file);
+struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);
 
 static inline struct pid *get_pid(struct pid *pid)
 {