From: marcin.slusarz@gmail.com <marcin.slusarz@gmail.com>
Date: Wed, 27 Feb 2008 21:38:38 +0000 (+0100)
Subject: udf: constify crc
X-Git-Tag: v2.6.26-rc1~1108^2~32
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8ed837d371c24b678182a30e9f0b1f61dee212c;p=linux-2.6

udf: constify crc

- constify internal crc table
- mark udf_crc "in" parameter as const

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/crc.c b/fs/udf/crc.c
index b1661296e7..f178c63686 100644
--- a/fs/udf/crc.c
+++ b/fs/udf/crc.c
@@ -23,7 +23,7 @@
 
 #include "udfdecl.h"
 
-static uint16_t crc_table[256] = {
+static const uint16_t crc_table[256] = {
 	0x0000U, 0x1021U, 0x2042U, 0x3063U, 0x4084U, 0x50a5U, 0x60c6U, 0x70e7U,
 	0x8108U, 0x9129U, 0xa14aU, 0xb16bU, 0xc18cU, 0xd1adU, 0xe1ceU, 0xf1efU,
 	0x1231U, 0x0210U, 0x3273U, 0x2252U, 0x52b5U, 0x4294U, 0x72f7U, 0x62d6U,
@@ -79,7 +79,7 @@ static uint16_t crc_table[256] = {
  *	July 21, 1997 - Andrew E. Mileski
  *	Adapted from OSTA-UDF(tm) 1.50 standard.
  */
-uint16_t udf_crc(uint8_t *data, uint32_t size, uint16_t crc)
+uint16_t udf_crc(const uint8_t *data, uint32_t size, uint16_t crc)
 {
 	while (size--)
 		crc = crc_table[(crc >> 8 ^ *(data++)) & 0xffU] ^ (crc << 8);
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 2310b5c8fd..26bc9c237c 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -210,7 +210,7 @@ extern long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int);
 extern short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);
 
 /* crc.c */
-extern uint16_t udf_crc(uint8_t *, uint32_t, uint16_t);
+extern uint16_t udf_crc(const uint8_t *, uint32_t, uint16_t);
 
 /* udftime.c */
 extern time_t *udf_stamp_to_time(time_t *, long *, kernel_timestamp);