[BLOCK] dm-crypt: Align IV to u64 for essiv

herbertx · David S. Miller · commit 45789328e5aa · 2006-12-06T18:38:48.000-08:00
This patch makes the IV u64-aligned since essiv does a u64 store to it.

Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
@@ -272,7 +272,7 @@ crypt_convert_scatterlist(struct crypt_config *cc, struct scatterlist *out,
                           struct scatterlist *in, unsigned int length,
                           int write, sector_t sector)
 {
-	u8 iv[cc->iv_size];
+	u8 iv[cc->iv_size] __attribute__ ((aligned(__alignof__(u64))));
 	struct blkcipher_desc desc = {
 		.tfm = cc->tfm,
 		.info = iv,

Original file line number	Diff line number	Diff line change
`@@ -272,7 +272,7 @@ crypt_convert_scatterlist(struct crypt_config cc, struct scatterlist out,`
`272`	`272`	`struct scatterlist *in, unsigned int length,`
`273`	`273`	`int write, sector_t sector)`
`274`	`274`	`{`
`275`		`- u8 iv[cc->iv_size];`
	`275`	`+ u8 iv[cc->iv_size] __attribute__ ((aligned(__alignof__(u64))));`
`276`	`276`	`struct blkcipher_desc desc = {`
`277`	`277`	`.tfm = cc->tfm,`
`278`	`278`	`.info = iv,`