From 5993e3be1d9ff5395c0b753c638760bff4a8360f Mon Sep 17 00:00:00 2001 From: Greg Kurz Date: Thu, 28 Feb 2019 16:06:06 +0100 Subject: [PATCH] crypto/block: remove redundant struct packing to fix build with gcc 9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Build fails with gcc 9: crypto/block-luks.c:689:18: error: taking address of packed member of ‘struct QCryptoBlockLUKSHeader’ may result in an unaligned pointer value [-Werror=address-of-packed-member] 689 | be32_to_cpus(&luks->header.payload_offset); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/block-luks.c:690:18: error: taking address of packed member of ‘struct QCryptoBlockLUKSHeader’ may result in an unaligned pointer value [-Werror=address-of-packed-member] 690 | be32_to_cpus(&luks->header.key_bytes); | ^~~~~~~~~~~~~~~~~~~~~~~ crypto/block-luks.c:691:18: error: taking address of packed member of ‘struct QCryptoBlockLUKSHeader’ may result in an unaligned pointer value [-Werror=address-of-packed-member] 691 | be32_to_cpus(&luks->header.master_key_iterations); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ... a bunch of similar errors... crypto/block-luks.c:1288:22: error: taking address of packed member of ‘struct QCryptoBlockLUKSKeySlot’ may result in an unaligned pointer value [-Werror=address-of-packed-member] 1288 | be32_to_cpus(&luks->header.key_slots[i].stripes); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors All members of the QCryptoBlockLUKSKeySlot and QCryptoBlockLUKSHeader are naturally aligned and we already check at build time there isn't any unwanted padding. Drop the QEMU_PACKED attribute. Reviewed-by: Eric Blake Signed-off-by: Greg Kurz Signed-off-by: Daniel P. Berrangé --- crypto/block-luks.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 6bac79c3ab..5a69b3ce74 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -146,7 +146,7 @@ struct QCryptoBlockLUKSKeySlot { uint32_t key_offset; /* number of anti-forensic stripes */ uint32_t stripes; -} QEMU_PACKED; +}; QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSKeySlot) != 48); @@ -191,7 +191,7 @@ struct QCryptoBlockLUKSHeader { /* key slots */ QCryptoBlockLUKSKeySlot key_slots[QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS]; -} QEMU_PACKED; +}; QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSHeader) != 592);