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staging: android: persistent_ram: Introduce persistent_ram_free() 

A corresponding function to persistent_ram_new().

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 17:18:05 -07:00 committed by Greg Kroah-Hartman
parent 24c3d2f342
commit d3b4876951
2 changed files with 18 additions and 0 deletions
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15
drivers/staging/android/persistent_ram.c
View File

@ -364,6 +364,9 @@ static void *persistent_ram_iomap(phys_addr_t start, size_t size)
static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size,
struct persistent_ram_zone *prz)
{
prz->paddr = start;
prz->size = size;
if (pfn_valid(start >> PAGE_SHIFT))
prz->vaddr = persistent_ram_vmap(start, size);
else
@ -437,6 +440,18 @@ static int __init persistent_ram_post_init(struct persistent_ram_zone *prz, bool
return 0;
}
void persistent_ram_free(struct persistent_ram_zone *prz)
{
if (pfn_valid(prz->paddr >> PAGE_SHIFT)) {
vunmap(prz->vaddr);
} else {
iounmap(prz->vaddr);
release_mem_region(prz->paddr, prz->size);
}
persistent_ram_free_old(prz);
kfree(prz);
}
struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start,
size_t size,
bool ecc)

3
drivers/staging/android/persistent_ram.h
View File

@ -39,6 +39,8 @@ struct persistent_ram {
};
struct persistent_ram_zone {
phys_addr_t paddr;
size_t size;
void *vaddr;
struct persistent_ram_buffer *buffer;
size_t buffer_size;
@ -66,6 +68,7 @@ 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);
void persistent_ram_free(struct persistent_ram_zone *prz);
struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev,
bool ecc);