kmemleak: use seq_hex_dump() to dump buffers

Instead of custom approach let's use recently introduced seq_hex_dump()
helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Joe Perches <joe@perches.com>
Cc: Tadeusz Struk <tadeusz.struk@intel.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 15 deletions

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index f532f6a37b55..77191eccdc6f 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -302,23 +302,14 @@ static void hex_dump_object(struct seq_file *seq,
                             struct kmemleak_object *object)
 {
         const u8 *ptr = (const u8 *)object->pointer;
-        int i, len, remaining;
-        unsigned char linebuf[HEX_ROW_SIZE * 5];
+        size_t len;
 
         /* limit the number of lines to HEX_MAX_LINES */
-        remaining = len =
-                min(object->size, (size_t)(HEX_MAX_LINES * HEX_ROW_SIZE));
-
-        seq_printf(seq, "  hex dump (first %d bytes):\n", len);
-        for (i = 0; i < len; i += HEX_ROW_SIZE) {
-                int linelen = min(remaining, HEX_ROW_SIZE);
-
-                remaining -= HEX_ROW_SIZE;
-                hex_dump_to_buffer(ptr + i, linelen, HEX_ROW_SIZE,
-                                   HEX_GROUP_SIZE, linebuf, sizeof(linebuf),
-                                   HEX_ASCII);
-                seq_printf(seq, "    %s\n", linebuf);
-        }
+        len = min_t(size_t, object->size, HEX_MAX_LINES * HEX_ROW_SIZE);
+
+        seq_printf(seq, "  hex dump (first %zu bytes):\n", len);
+        seq_hex_dump(seq, "    ", DUMP_PREFIX_NONE, HEX_ROW_SIZE,
+                     HEX_GROUP_SIZE, ptr, len, HEX_ASCII);
 }
 
 /*