[PATCH 1/5] kernel/pid.c: remove static qualifier from pidfd_create()
From: Matthew Bobrowski <repnop@google.com>
Date: 2021-05-20 02:10:19
Also in:
linux-fsdevel
Subsystem:
the rest · Maintainer:
Linus Torvalds
With the idea of returning pidfds from the fanotify API, there needs to be mechanism exposed for creating pidfds. To do this, the static qualifier is dropped from pidfd_create() and a declaration is added to linux/pid.h so that this function can be called from other kernel subsystems i.e. fanotify in this case. Signed-off-by: Matthew Bobrowski <repnop@google.com> --- include/linux/pid.h | 1 + kernel/pid.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/pid.h b/include/linux/pid.h
index fa10acb8d6a4..af308e15f174 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h@@ -78,6 +78,7 @@ struct file; extern struct pid *pidfd_pid(const struct file *file); struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags); +int pidfd_create(struct pid *pid, unsigned int flags); static inline struct pid *get_pid(struct pid *pid) {
diff --git a/kernel/pid.c b/kernel/pid.c
index ebdf9c60cd0b..d3cd95b8b080 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c@@ -550,10 +550,12 @@ struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) * Note, that this function can only be called after the fd table has * been unshared to avoid leaking the pidfd to the new process. * + * This symbol should not be explicitly exported to loadable modules. + * * Return: On success, a cloexec pidfd is returned. * On error, a negative errno number will be returned. */ -static int pidfd_create(struct pid *pid, unsigned int flags) +int pidfd_create(struct pid *pid, unsigned int flags) { int fd;
--
2.31.1.751.gd2f1c929bd-goog
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