hexdump: use const notation

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.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 3 insertions, 3 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4300bb462d29..b4f5b81b4257 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 473f5aed6cae..16f2e2935e87 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];