aes.h: add comment for round key buffer in aes context
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
diff --git a/include/mbedtls/aes.h b/include/mbedtls/aes.h
index a8d4306..6c75f77 100644
--- a/include/mbedtls/aes.h
+++ b/include/mbedtls/aes.h
@@ -77,7 +77,9 @@
size_t MBEDTLS_PRIVATE(rk_offset); /*!< The offset in array elements to AES
round keys in the buffer. */
#if defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH) && !defined(MBEDTLS_PADLOCK_C)
- uint32_t MBEDTLS_PRIVATE(buf)[44];
+ uint32_t MBEDTLS_PRIVATE(buf)[44]; /*!< Aligned data buffer to hold
+ round keys in the 128-bit case for
+ 10 rounds calculation. */
#else
uint32_t MBEDTLS_PRIVATE(buf)[68]; /*!< Unaligned data buffer. This buffer can
hold 32 extra Bytes, which can be used for