pstore/ram_core: Get rid of prz->ecc enable/disable flag

Nowadays we can use prz->ecc_size as a flag, no need for the special
member in the prz struct.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/pstore/ram_core.c

@@ -114,7 +114,7 @@ static void notrace persistent_ram_update_ecc(struct persistent_ram_zone *prz,
 	int ecc_size = prz->ecc_size;
 	int size = prz->ecc_block_size;
 
-	if (!prz->ecc)
+	if (!prz->ecc_size)
 		return;
 
 	block = buffer->data + (start & ~(ecc_block_size - 1));
@@ -133,7 +133,7 @@ static void persistent_ram_update_header_ecc(struct persistent_ram_zone *prz)
 {
 	struct persistent_ram_buffer *buffer = prz->buffer;
 
-	if (!prz->ecc)
+	if (!prz->ecc_size)
 		return;
 
 	persistent_ram_encode_rs8(prz, (uint8_t *)buffer, sizeof(*buffer),
@@ -146,7 +146,7 @@ static void persistent_ram_ecc_old(struct persistent_ram_zone *prz)
 	uint8_t *block;
 	uint8_t *par;
 
-	if (!prz->ecc)
+	if (!prz->ecc_size)
 		return;
 
 	block = buffer->data;
@@ -181,7 +181,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz,
 	int ecc_symsize = 8;
 	int ecc_poly = 0x11d;
 
-	if (!prz->ecc)
+	if (!ecc_size)
 		return 0;
 
 	prz->ecc_block_size = 128;
@@ -395,8 +395,6 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz,
 {
 	int ret;
 
-	prz->ecc = ecc_size;
-
 	ret = persistent_ram_init_ecc(prz, ecc_size);
 	if (ret)
 		return ret;

include/linux/pstore_ram.h

@@ -33,7 +33,6 @@ struct persistent_ram_zone {
 	size_t buffer_size;
 
 	/* ECC correction */
-	bool ecc;
 	char *par_buffer;
 	char *par_header;
 	struct rs_control *rs_decoder;