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>
diff --git a/drivers/staging/android/persistent_ram.c b/drivers/staging/android/persistent_ram.c
index c16d7c2..63481da 100644
--- a/drivers/staging/android/persistent_ram.c
+++ b/drivers/staging/android/persistent_ram.c
@@ -364,6 +364,9 @@
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 @@
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)