[PATCH] hexdump: use const notation

[Artem Bityutskiy <dedekind@infradead.org>]

Trivial fix: mark the buffer to hexdump as const so callers could avoid
casting their const buffers when calling print_hex_dump().

The patch is really trivial and I suggest to consider it as a fix
(it fixes GCC warnings) and push it to current tree.


diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4300bb4..b4f5b81 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -224,7 +224,7 @@ extern void hex_dump_to_buffer(const void *buf, size_t len,
 				char *linebuf, size_t linebuflen, bool ascii);
 extern void print_hex_dump(const char *level, const char *prefix_str,
 				int prefix_type, int rowsize, int groupsize,
-				void *buf, size_t len, bool ascii);
+				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);
 #define hex_asc(x)	"0123456789abcdef"[x]
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 473f5ae..16f2e29 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -145,9 +145,9 @@ EXPORT_SYMBOL(hex_dump_to_buffer);
  */
 void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
 			int rowsize, int groupsize,
-			void *buf, size_t len, bool ascii)
+			const void *buf, size_t len, bool ascii)
 {
-	u8 *ptr = buf;
+	const u8 *ptr = buf;
 	int i, linelen, remaining = len;
 	unsigned char linebuf[200];
 


-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)

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