libblkid: ddf_raid: respect constness of buffer

The buffers returned by blkid_probe_get_buffer() are not allowed to be
modified. Respect this restriction when casting the buffer to other
pointer types.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>

diff --git a/libblkid/src/superblocks/ddf_raid.c b/libblkid/src/superblocks/ddf_raid.c
index a7cf32cf40923a8b3a073af4d0d6139dacd03a60..f3be81574419138354bf6326dcc965fa0aa61f26 100644 (file)
--- a/libblkid/src/superblocks/ddf_raid.c
+++ b/libblkid/src/superblocks/ddf_raid.c
@@ -76,14 +76,14 @@ static int probe_ddf(blkid_probe pr,
 {
        int hdrs[] = { 1, 257 };
        size_t i;
-       struct ddf_header *ddf = NULL;
+       const struct ddf_header *ddf = NULL;
        char version[DDF_REV_LENGTH + 1];
        uint64_t off = 0, lba;
 
        for (i = 0; i < ARRAY_SIZE(hdrs); i++) {
                off = ((pr->size / 0x200) - hdrs[i]) * 0x200;
 
-               ddf = (struct ddf_header *) blkid_probe_get_buffer(pr,
+               ddf = (const struct ddf_header *) blkid_probe_get_buffer(pr,
                                        off,
                                        sizeof(struct ddf_header));
                if (!ddf)
@@ -123,7 +123,7 @@ static int probe_ddf(blkid_probe pr,
                return 1;
        if (blkid_probe_set_magic(pr, off,
                        sizeof(ddf->signature),
-                       (unsigned char *) &ddf->signature))
+                       (const unsigned char *) &ddf->signature))
                return 1;
        return 0;
 }