1 files changed, 12 insertions, 1 deletions
diff --git a/crypto/ccm.c b/crypto/ccm.c
index 0a083342ec8c..aca949559be8 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -46,7 +46,18 @@ struct crypto_rfc4309_req_ctx {
 struct crypto_ccm_req_priv_ctx {
 	u8 odata[16];
 	u8 idata[16];
-	u8 auth_tag[16];
+
+	/*
+	 * We need to force auth_tag to be on its own cacheline.
+	 *
+	 * We put it on its cacheline with the macro ____cacheline_aligned.
+	 * The next fields must be on another cacheline so we add a dummy field
+	 * which is located on another cacheline to enforce that.
+	 */
+	u8 auth_tag[16] ____cacheline_aligned;
+
+	u8 dummy_align_auth_tag ____cacheline_aligned;
+
 	u32 flags;
 	struct scatterlist src[3];
 	struct scatterlist dst[3];