crypto: padlock - Use zero page instead of stack buffer

Use desc instead of a stack buffer in the final function.  This
fixes a compiler warning about buf being uninitialised.

Signed-off-by: Herbert Xu <[email protected]>

Author: herbertx

drivers/crypto/padlock-sha.c

@@ -125,7 +125,7 @@ static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
 
 static int padlock_sha1_final(struct shash_desc *desc, u8 *out)
 {
-	u8 buf[4];
+	const u8 *buf = (void *)desc;
 
 	return padlock_sha1_finup(desc, buf, 0, out);
 }
@@ -186,7 +186,7 @@ static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
 
 static int padlock_sha256_final(struct shash_desc *desc, u8 *out)
 {
-	u8 buf[4];
+	const u8 *buf = (void *)desc;
 
 	return padlock_sha256_finup(desc, buf, 0, out);
 }