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Cc: Christian Brauner Signed-off-by: Minchan Kim --- include/linux/pid.h | 1 + kernel/exit.c | 17 ----------------- kernel/pid.c | 17 +++++++++++++++++ 3 files changed, 18 insertions(+), 17 deletions(-) diff --git a/include/linux/pid.h b/include/linux/pid.h index 998ae7d24450..023d9c3a8edc 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -75,6 +75,7 @@ extern const struct file_operations pidfd_fops; struct file; =20 extern struct pid *pidfd_pid(const struct file *file); +extern struct pid *pidfd_get_pid(unsigned int fd); =20 static inline struct pid *get_pid(struct pid *pid) { diff --git a/kernel/exit.c b/kernel/exit.c index 0b81b26a872a..43375f9d8bbc 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1470,23 +1470,6 @@ static long do_wait(struct wait_opts *wo) return retval; } =20 -static struct pid *pidfd_get_pid(unsigned int fd) -{ - struct fd f; - struct pid *pid; - - f =3D fdget(fd); - if (!f.file) - return ERR_PTR(-EBADF); - - pid =3D pidfd_pid(f.file); - if (!IS_ERR(pid)) - get_pid(pid); - - fdput(f); - return pid; -} - static long kernel_waitid(int which, pid_t upid, struct waitid_info *inf= op, int options, struct rusage *ru) { diff --git a/kernel/pid.c b/kernel/pid.c index 0f4ecb57214c..360ba480a2a9 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -496,6 +496,23 @@ struct pid *find_ge_pid(int nr, struct pid_namespace= *ns) return idr_get_next(&ns->idr, &nr); } =20 +struct pid *pidfd_get_pid(unsigned int fd) +{ + struct fd f; + struct pid *pid; + + f =3D fdget(fd); + if (!f.file) + return ERR_PTR(-EBADF); + + pid =3D pidfd_pid(f.file); + if (!IS_ERR(pid)) + get_pid(pid); + + fdput(f); + return pid; +} + /** * pidfd_create() - Create a new pid file descriptor. * --=20 2.25.0.225.g125e21ebc7-goog