[PATCH] Mark some key VFS functions as __always_inline

Mark a few VFS functions as mandatory inline (based on Al Viro's request);
these must be inline due to stack usage issues during a recursive loop that
happens during the recursive symlink resolution (symlink to a symlink to a
symlink ..)

This patch at this point does not change behavior and is for documentation
purposes only (but this changes later in the series)

Signed-off-by: Arjan van de Ven <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/namei.c

···
 static int __emul_lookup_dentry(const char *, struct nameidata *);
 
 /* SMP-safe */
-static inline int
+static __always_inline int
 walk_init_root(const char *name, struct nameidata *nd)
 {
 	read_lock(&current->fs->lock);
···
 	return 1;
 }
 
-static inline int __vfs_follow_link(struct nameidata *nd, const char *link)
+static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link)
 {
 	int res = 0;
 	char *name;
···
 	struct dentry *dentry;
 };
 
-static inline int __do_follow_link(struct path *path, struct nameidata *nd)
+static __always_inline int __do_follow_link(struct path *path, struct nameidata *nd)
 {
 	int error;
 	void *cookie;
···
 	return 0;
 }
 
-static inline void follow_dotdot(struct nameidata *nd)
+static __always_inline void follow_dotdot(struct nameidata *nd)
 {
 	while(1) {
 		struct vfsmount *parent;