From e7e5d608fb6cef9929a2cf56d72fa7e236ca7573 Mon Sep 17 00:00:00 2001 From: Tomas Mraz Date: Wed, 10 Aug 2016 15:21:32 +0200 Subject: [PATCH] Add a comment for the added cast with explanation. Reviewed-by: Tim Hudson Reviewed-by: Matt Caswell --- engines/afalg/e_afalg.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/engines/afalg/e_afalg.c b/engines/afalg/e_afalg.c index 456ffda9aa..1766230ce8 100644 --- a/engines/afalg/e_afalg.c +++ b/engines/afalg/e_afalg.c @@ -230,6 +230,10 @@ int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf, memset(cb, '\0', sizeof(*cb)); cb->aio_fildes = sfd; cb->aio_lio_opcode = IOCB_CMD_PREAD; + /* + * The pointer has to be converted to unsigned value first to avoid + * sign extension on cast to 64 bit value + */ cb->aio_buf = (uint64_t)(unsigned long)buf; cb->aio_offset = 0; cb->aio_data = 0; -- 2.25.1