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Commit 8cf5aff8 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Greg Kroah-Hartman
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staging: android: persistent_ram: Introduce persistent_ram_new() 



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: default avatarAnton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bb4206f2

drivers/staging/android/persistent_ram.c

+26 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/staging/android/persistent_ram.h

+4 −0
Original line number Diff line number Diff line
@@ -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);