mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 01:04:08 +08:00
20c8ccb197
Based on 1 normalized pattern(s): this work is licensed under the terms of the gnu gpl version 2 see the copying file in the top level directory extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 35 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.797835076@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef PAGE_ACTOR_H
|
|
#define PAGE_ACTOR_H
|
|
/*
|
|
* Copyright (c) 2013
|
|
* Phillip Lougher <phillip@squashfs.org.uk>
|
|
*/
|
|
|
|
#ifndef CONFIG_SQUASHFS_FILE_DIRECT
|
|
struct squashfs_page_actor {
|
|
void **page;
|
|
int pages;
|
|
int length;
|
|
int next_page;
|
|
};
|
|
|
|
static inline struct squashfs_page_actor *squashfs_page_actor_init(void **page,
|
|
int pages, int length)
|
|
{
|
|
struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
|
|
|
|
if (actor == NULL)
|
|
return NULL;
|
|
|
|
actor->length = length ? : pages * PAGE_SIZE;
|
|
actor->page = page;
|
|
actor->pages = pages;
|
|
actor->next_page = 0;
|
|
return actor;
|
|
}
|
|
|
|
static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
|
|
{
|
|
actor->next_page = 1;
|
|
return actor->page[0];
|
|
}
|
|
|
|
static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
|
|
{
|
|
return actor->next_page == actor->pages ? NULL :
|
|
actor->page[actor->next_page++];
|
|
}
|
|
|
|
static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
|
|
{
|
|
/* empty */
|
|
}
|
|
#else
|
|
struct squashfs_page_actor {
|
|
union {
|
|
void **buffer;
|
|
struct page **page;
|
|
};
|
|
void *pageaddr;
|
|
void *(*squashfs_first_page)(struct squashfs_page_actor *);
|
|
void *(*squashfs_next_page)(struct squashfs_page_actor *);
|
|
void (*squashfs_finish_page)(struct squashfs_page_actor *);
|
|
int pages;
|
|
int length;
|
|
int next_page;
|
|
};
|
|
|
|
extern struct squashfs_page_actor *squashfs_page_actor_init(void **, int, int);
|
|
extern struct squashfs_page_actor *squashfs_page_actor_init_special(struct page
|
|
**, int, int);
|
|
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);
|
|
}
|
|
#endif
|
|
#endif
|