fuse: export fuse_get_unique()

task #28910367
commit 79d96efffda7597b41968d5d8813b39fc2965f1b upstream

virtio-fs will need unique IDs for FORGET requests from outside
fs/fuse/dev.c.  Make the symbol visible.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NLiu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

fs/fuse/dev.c

@@ -322,10 +322,11 @@ unsigned fuse_len_args(unsigned numargs, struct fuse_arg *args)
 }
 EXPORT_SYMBOL_GPL(fuse_len_args);
 
-static u64 fuse_get_unique(struct fuse_iqueue *fiq)
+u64 fuse_get_unique(struct fuse_iqueue *fiq)
 {
 	return ++fiq->reqctr;
 }
+EXPORT_SYMBOL_GPL(fuse_get_unique);
 
 /**
  * A new request is available, wake fiq->waitq

fs/fuse/fuse_i.h

@@ -1089,4 +1089,9 @@ int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type);
  */
 unsigned fuse_len_args(unsigned numargs, struct fuse_arg *args);
 
+/**
+ * Get the next unique ID for a request
+ */
+u64 fuse_get_unique(struct fuse_iqueue *fiq);
+
 #endif /* _FS_FUSE_I_H */