Commit cf5cbf9f authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

powerpc/nvram: Add nvram_find_partition() 



Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent fa2b4e54

arch/powerpc/kernel/nvram_64.c

+22 −0
Original line number Diff line number Diff line
@@ -429,6 +429,28 @@ static int nvram_get_partition_size(loff_t data_index) 
}





/**

 * nvram_find_partition - Find an nvram partition by signature and name

 * @name: Name of the partition or NULL for any name

 * @sig: Signature to test against

 * @out_size: if non-NULL, returns the size of the data part of the partition

 */

loff_t nvram_find_partition(const char *name, int sig, int *out_size)

{

	struct nvram_partition *p;



	list_for_each_entry(p, &nvram_part->partition, partition) {

		if (p->header.signature == sig &&

		    (!name || !strncmp(p->header.name, name, 12))) {

			if (out_size)

				*out_size = (p->header.length - 1) *

					NVRAM_BLOCK_LEN;

			return p->index + NVRAM_HEADER_LEN;

		}

	}

	return 0;

}



/* nvram_setup_partition

 *

 * This will setup the partition we need for buffering the