linux/fs/mount.h

#include <linux/mount.h>

static inline int mnt_has_parent(struct vfsmount *mnt)
{
	return mnt != mnt->mnt_parent;
}
vfs: new internal helper: mnt_has_parent(mnt) vfsmounts have ->mnt_parent pointing either to a different vfsmount or to itself; it's never NULL and termination condition in loops traversing the tree towards root is mnt == mnt->mnt_parent. At least one place (see the next patch) is confused about what's going on; let's add an explicit helper checking it right way and use it in all places where we need it. Not that there had been too many, but... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 2011-11-24 00:26:23 +00:00			`#include <linux/mount.h>`

			`static inline int mnt_has_parent(struct vfsmount *mnt)`
			`{`
			`return mnt != mnt->mnt_parent;`
			`}`