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 --- drivers/staging/android/persistent_ram.c | 26 ++++++++++++++++++++++++++ drivers/staging/android/persistent_ram.h | 4 ++++ 2 files changed, 30 insertions(+)
diff --git a/drivers/staging/android/persistent_ram.c b/drivers/staging/android/persistent_ram.c index ec23822..c0c3d32 100644 --- a/drivers/staging/android/persistent_ram.c +++ b/drivers/staging/android/persistent_ram.c @@ -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) { diff --git a/drivers/staging/android/persistent_ram.h b/drivers/staging/android/persistent_ram.h index 5635355..8154d15 100644 --- a/drivers/staging/android/persistent_ram.h +++ b/drivers/staging/android/persistent_ram.h @@ -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);