Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/fs/squashfs/page_actor.h b/fs/squashfs/page_actor.h
new file mode 100644
index 0000000000..97d4983559
--- /dev/null
+++ b/fs/squashfs/page_actor.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef PAGE_ACTOR_H
+#define PAGE_ACTOR_H
+/*
+ * Copyright (c) 2013
+ * Phillip Lougher <phillip@squashfs.org.uk>
+ */
+
+struct squashfs_page_actor {
+	union {
+		void		**buffer;
+		struct page	**page;
+	};
+	void	*pageaddr;
+	void	*tmp_buffer;
+	void    *(*squashfs_first_page)(struct squashfs_page_actor *);
+	void    *(*squashfs_next_page)(struct squashfs_page_actor *);
+	void    (*squashfs_finish_page)(struct squashfs_page_actor *);
+	struct page *last_page;
+	int	pages;
+	int	length;
+	int	next_page;
+	int	alloc_buffer;
+	int	returned_pages;
+	pgoff_t	next_index;
+};
+
+extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
+				int pages, int length);
+extern struct squashfs_page_actor *squashfs_page_actor_init_special(
+				struct squashfs_sb_info *msblk,
+				struct page **page, int pages, int length);
+static inline struct page *squashfs_page_actor_free(struct squashfs_page_actor *actor)
+{
+	struct page *last_page = actor->last_page;
+
+	kfree(actor->tmp_buffer);
+	kfree(actor);
+	return last_page;
+}
+static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
+{
+	return actor->squashfs_first_page(actor);
+}
+static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
+{
+	return actor->squashfs_next_page(actor);
+}
+static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
+{
+	actor->squashfs_finish_page(actor);
+}
+static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor)
+{
+	actor->alloc_buffer = 0;
+}
+#endif