mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Common code to handle absent "placeholder" devices
|
|
* Copyright 2001 Resilience Corporation <ebrower@resilience.com>
|
|
*
|
|
* This map driver is used to allocate "placeholder" MTD
|
|
* devices on systems that have socketed/removable media.
|
|
* Use of this driver as a fallback preserves the expected
|
|
* registration of MTD device nodes regardless of probe outcome.
|
|
* A usage example is as follows:
|
|
*
|
|
* my_dev[i] = do_map_probe("cfi", &my_map[i]);
|
|
* if(NULL == my_dev[i]) {
|
|
* my_dev[i] = do_map_probe("map_absent", &my_map[i]);
|
|
* }
|
|
*
|
|
* Any device 'probed' with this driver will return -ENODEV
|
|
* upon open.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
|
|
static int map_absent_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
|
|
static int map_absent_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
|
|
static int map_absent_erase (struct mtd_info *, struct erase_info *);
|
|
static void map_absent_sync (struct mtd_info *);
|
|
static struct mtd_info *map_absent_probe(struct map_info *map);
|
|
static void map_absent_destroy (struct mtd_info *);
|
|
|
|
|
|
static struct mtd_chip_driver map_absent_chipdrv = {
|
|
.probe = map_absent_probe,
|
|
.destroy = map_absent_destroy,
|
|
.name = "map_absent",
|
|
.module = THIS_MODULE
|
|
};
|
|
|
|
static struct mtd_info *map_absent_probe(struct map_info *map)
|
|
{
|
|
struct mtd_info *mtd;
|
|
|
|
mtd = kzalloc_obj(*mtd);
|
|
if (!mtd) {
|
|
return NULL;
|
|
}
|
|
|
|
map->fldrv = &map_absent_chipdrv;
|
|
mtd->priv = map;
|
|
mtd->name = map->name;
|
|
mtd->type = MTD_ABSENT;
|
|
mtd->size = map->size;
|
|
mtd->_erase = map_absent_erase;
|
|
mtd->_read = map_absent_read;
|
|
mtd->_write = map_absent_write;
|
|
mtd->_sync = map_absent_sync;
|
|
mtd->flags = 0;
|
|
mtd->erasesize = PAGE_SIZE;
|
|
mtd->writesize = 1;
|
|
|
|
__module_get(THIS_MODULE);
|
|
return mtd;
|
|
}
|
|
|
|
|
|
static int map_absent_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int map_absent_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int map_absent_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void map_absent_sync(struct mtd_info *mtd)
|
|
{
|
|
/* nop */
|
|
}
|
|
|
|
static void map_absent_destroy(struct mtd_info *mtd)
|
|
{
|
|
/* nop */
|
|
}
|
|
|
|
static int __init map_absent_init(void)
|
|
{
|
|
register_mtd_chip_driver(&map_absent_chipdrv);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit map_absent_exit(void)
|
|
{
|
|
unregister_mtd_chip_driver(&map_absent_chipdrv);
|
|
}
|
|
|
|
module_init(map_absent_init);
|
|
module_exit(map_absent_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Resilience Corporation - Eric Brower <ebrower@resilience.com>");
|
|
MODULE_DESCRIPTION("Placeholder MTD chip driver for 'absent' chips");
|