fs: make build_open_flags() available internally

to #26323588

commit 35cb6d54c1d5daf1d1ed585ef5ce4557e7ab284c upstream.

This is a prep patch for supporting non-blocking open from io_uring.
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Acked-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>

fs/internal.h

@@ -117,6 +117,8 @@ extern struct file *do_filp_open(int dfd, struct filename *pathname,
 		const struct open_flags *op);
 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 		const char *, const struct open_flags *);
+extern struct open_how build_open_how(int flags, umode_t mode);
+extern int build_open_flags(const struct open_how *how, struct open_flags *op);
 
 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 long do_faccessat(int dfd, const char __user *filename, int mode);

fs/open.c

@@ -949,7 +949,7 @@ EXPORT_SYMBOL(open_with_fake_path);
 #define WILL_CREATE(flags)	(flags & (O_CREAT | __O_TMPFILE))
 #define O_PATH_FLAGS		(O_DIRECTORY | O_NOFOLLOW | O_PATH | O_CLOEXEC)
 
-static inline struct open_how build_open_how(int flags, umode_t mode)
+inline struct open_how build_open_how(int flags, umode_t mode)
 {
 	struct open_how how = {
 		.flags = flags & VALID_OPEN_FLAGS,
@@ -965,8 +965,7 @@ static inline struct open_how build_open_how(int flags, umode_t mode)
 	return how;
 }
 
-static inline int build_open_flags(const struct open_how *how,
-				   struct open_flags *op)
+inline int build_open_flags(const struct open_how *how, struct open_flags *op)
 {
 	int flags = how->flags;
 	int lookup_flags = 0;