From: kernel test robot <lkp@intel.com>
To: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org
Subject: drivers/net/can/spi/mcp251xfd/mcp251xfd.h:481:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to ...
Date: Wed, 18 May 2022 14:45:33 +0800 [thread overview]
Message-ID: <202205181414.n8QRDe8k-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 210e04ff768142b96452030c4c2627512b30ad95
commit: eb79a267c9b3e608e7762a1b221428f37ace3aa3 can: mcp251xfd: rename all remaining occurrence to mcp251xfd
date: 1 year, 8 months ago
config: arm-randconfig-c002-20220518 (https://download.01.org/0day-ci/archive/20220518/202205181414.n8QRDe8k-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 853fa8ee225edf2d0de94b0dcbd31bea916e825e)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb79a267c9b3e608e7762a1b221428f37ace3aa3
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout eb79a267c9b3e608e7762a1b221428f37ace3aa3
# save the config file
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/net/can/spi/mcp251xfd/mcp251xfd.h:481:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
^
drivers/net/can/spi/mcp251xfd/mcp251xfd.h:485:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:483:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:483:2)' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
^
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c:511:1: warning: unused function 'mcp251xfd_chip_set_mode_nowait' [-Wunused-function]
mcp251xfd_chip_set_mode_nowait(const struct mcp251xfd_priv *priv,
^
3 warnings generated.
--
>> drivers/net/can/spi/mcp251xfd/mcp251xfd.h:481:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
^
drivers/net/can/spi/mcp251xfd/mcp251xfd.h:485:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:483:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:483:2)' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
^
2 warnings generated.
vim +481 drivers/net/can/spi/mcp251xfd/mcp251xfd.h
477
478 union mcp251xfd_tx_obj_load_buf {
479 struct __packed {
480 struct mcp251xfd_buf_cmd cmd;
> 481 struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
482 } nocrc;
483 struct __packed {
484 struct mcp251xfd_buf_cmd_crc cmd;
485 struct mcp251xfd_hw_tx_obj_raw hw_tx_obj;
486 __be16 crc;
487 } crc;
488 } ____cacheline_aligned;
489
--
0-DAY CI Kernel Test Service
https://01.org/lkp
next reply other threads:[~2022-05-18 6:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 6:45 kernel test robot [this message]
2022-05-18 7:05 ` drivers/net/can/spi/mcp251xfd/mcp251xfd.h:481:34: warning: field hw_tx_obj within 'struct mcp251xfd_tx_obj_load_buf::(unnamed at drivers/net/can/spi/mcp251xfd/mcp251xfd.h:479:2)' is less aligned than 'struct mcp251xfd_hw_tx_obj_raw' and is usually due to Marc Kleine-Budde
2022-05-18 11:43 ` [PATCH] can: mcp251xfd: silence clang's -Wunaligned-access warning Vincent Mailhol
2022-05-18 11:58 ` Marc Kleine-Budde
2022-05-18 16:05 ` Nathan Chancellor
2022-05-18 16:15 ` Vincent MAILHOL
2022-05-18 16:18 ` Nathan Chancellor
2022-05-18 20:15 ` Marc Kleine-Budde
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