io_uring: move io_uring_get_socket() into io_uring.h

Now we have a io_uring kernel header, move this definition out of fs.h
and into io_uring.h where it belongs.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/fs.h

@@ -3514,15 +3514,6 @@ extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len,
 extern int generic_fadvise(struct file *file, loff_t offset, loff_t len,
 			   int advice);
 
-#if defined(CONFIG_IO_URING)
-extern struct sock *io_uring_get_socket(struct file *file);
-#else
-static inline struct sock *io_uring_get_socket(struct file *file)
-{
-	return NULL;
-}
-#endif
-
 int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
 			     unsigned int flags);
 

include/linux/io_uring.h

@@ -19,6 +19,7 @@ struct io_uring_task {
 };
 
 #if defined(CONFIG_IO_URING)
+struct sock *io_uring_get_socket(struct file *file);
 void __io_uring_task_cancel(void);
 void __io_uring_files_cancel(struct files_struct *files);
 void __io_uring_free(struct task_struct *tsk);
@@ -39,6 +40,10 @@ static inline void io_uring_free(struct task_struct *tsk)
 		__io_uring_free(tsk);
 }
 #else
+static inline struct sock *io_uring_get_socket(struct file *file)
+{
+	return NULL;
+}
 static inline void io_uring_task_cancel(void)
 {
 }

net/unix/scm.c

@@ -8,6 +8,7 @@
 #include <net/af_unix.h>
 #include <net/scm.h>
 #include <linux/init.h>
+#include <linux/io_uring.h>
 
 #include "scm.h"