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staging: android: persistent_ram: Introduce persistent_ram_new()

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The routine just creates a persistent ram zone at a specified address.

For persistent_ram_init_ringbuffer() we'd need to add a
'struct persistent_ram' to the global list, and associate it with a
device. We don't need all this complexity in pstore_ram, so we introduce
the simple function.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Anton Vorontsov 2012-05-11 17:17:34 -07:00 committed by Greg Kroah-Hartman
parent bb4206f204
commit 8cf5aff89e
2 changed files with 30 additions and 0 deletions
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26
drivers/staging/android/persistent_ram.c
View File

@ -412,6 +412,32 @@ static int __init persistent_ram_post_init(struct persistent_ram_zone *prz, bool
return 0;
}
struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start,
size_t size,
bool ecc)
{
struct persistent_ram_zone *prz;
int ret = -ENOMEM;
prz = kzalloc(sizeof(struct persistent_ram_zone), GFP_KERNEL);
if (!prz) {
pr_err("persistent_ram: failed to allocate persistent ram zone\n");
goto err;
}
ret = persistent_ram_buffer_map(start, size, prz);
if (ret)
goto err;
persistent_ram_post_init(prz, ecc);
persistent_ram_update_header_ecc(prz);
return prz;
err:
kfree(prz);
return ERR_PTR(ret);
}
static __init
struct persistent_ram_zone *__persistent_ram_init(struct device *dev, bool ecc)
{

4
drivers/staging/android/persistent_ram.h
View File

@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/init.h>
struct persistent_ram_buffer;
@ -62,6 +63,9 @@ struct persistent_ram_zone {
int persistent_ram_early_init(struct persistent_ram *ram);
struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start,
size_t size,
bool ecc);
struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev,
bool ecc);