hex_dump: add missing "const" qualifiers

Add missing "const" qualifiers to the print_hex_dump_bytes() library routines.

(akpm: rumoured to fix some compile warning somewhere)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/kernel.h

@@ -226,7 +226,7 @@ extern void print_hex_dump(const char *level, const char *prefix_str,
 				int prefix_type, int rowsize, int groupsize,
 				const void *buf, size_t len, bool ascii);
 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-			void *buf, size_t len);
+			const void *buf, size_t len);
 #define hex_asc(x)	"0123456789abcdef"[x]
 
 #ifdef DEBUG

lib/hexdump.c

@@ -189,7 +189,7 @@ EXPORT_SYMBOL(print_hex_dump);
  * rowsize of 16, groupsize of 1, and ASCII output included.
  */
 void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-			void *buf, size_t len)
+			const void *buf, size_t len)
 {
 	print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
 			buf, len, 1);