From: Amir Goldstein <amir73il@gmail.com> mainline inclusion from mainline-v6.7-rc1 commit ddf9e2ff67a910acde1d000e76b7e31267599539 category: feature bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBHLU4 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Overlayfs is going to use those to get write access on the upper mount during entire copy up without taking freeze protection on upper sb for the entire copy up. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Message-Id: <20230908132900.2983519-3-amir73il@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Yifan Qiao <qiaoyifan4@huawei.com> --- fs/namespace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/namespace.c b/fs/namespace.c index 815adb5d1490..012c3c4461e7 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -376,6 +376,7 @@ int mnt_get_write_access(struct vfsmount *m) return ret; } +EXPORT_SYMBOL_GPL(mnt_get_write_access); /** * mnt_want_write - get write access to a mount @@ -456,6 +457,7 @@ void mnt_put_write_access(struct vfsmount *mnt) mnt_dec_writers(real_mount(mnt)); preempt_enable(); } +EXPORT_SYMBOL_GPL(mnt_put_write_access); /** * mnt_drop_write - give up write access to a mount -- 2.39.2