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Message-ID: <202208110344.tcjjNU4C-lkp@intel.com>
Date: Thu, 11 Aug 2022 03:51:07 +0800
From: kernel test robot <lkp@...el.com>
To: Karsten Graul <kgraul@...ux.ibm.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: net/smc/smc_llc.c:40:1: warning: alignment 1 of 'struct smc_llc_hdr'
is less than 4
Hi Karsten,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f41445645ab5d172e6090d00c332c335d8dba337
commit: b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 net/smc: extend LLC layer for SMC-Rv2
date: 10 months ago
config: arm-randconfig-s053-20220810 (https://download.01.org/0day-ci/archive/20220811/202208110344.tcjjNU4C-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/vmxnet3/ drivers/video/fbdev/aty/ net/smc/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> net/smc/smc_llc.c:40:1: warning: alignment 1 of 'struct smc_llc_hdr' is less than 4 [-Wpacked-not-aligned]
40 | } __packed; /* format defined in
| ^
In file included from <command-line>:
net/smc/smc_llc.c: In function 'smc_llc_add_pending_send':
include/linux/compiler_types.h:322:45: error: call to '__compiletime_assert_562' declared with attribute error: must increase SMC_WR_BUF_SIZE to at least sizeof(struct smc_llc_msg)
322 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:303:25: note: in definition of macro '__compiletime_assert'
303 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:322:9: note: in expansion of macro '_compiletime_assert'
322 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
net/smc/smc_llc.c:409:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
409 | BUILD_BUG_ON_MSG(
| ^~~~~~~~~~~~~~~~
include/linux/compiler_types.h:322:45: error: call to '__compiletime_assert_563' declared with attribute error: must adapt SMC_WR_TX_SIZE to sizeof(struct smc_llc_msg); if not all smc_wr upper layer protocols use the same message size any more, must start to set link->wr_tx_sges[i].length on each individual smc_wr_tx_send()
322 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:303:25: note: in definition of macro '__compiletime_assert'
303 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:322:9: note: in expansion of macro '_compiletime_assert'
322 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
net/smc/smc_llc.c:412:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
412 | BUILD_BUG_ON_MSG(
| ^~~~~~~~~~~~~~~~
In function 'smc_llc_send_message_wait',
inlined from 'smc_llc_send_link_delete_all' at net/smc/smc_llc.c:1635:8:
net/smc/smc_llc.c:785:9: warning: 'memcpy' reading 60 bytes from a region of size 49 [-Wstringop-overread]
785 | memcpy(wr_buf, llcbuf, sizeof(union smc_llc_msg));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/smc/smc_llc.c: In function 'smc_llc_send_link_delete_all':
net/smc/smc_llc.c:1622:37: note: source object 'delllc' of size 49
1622 | struct smc_llc_msg_del_link delllc = {};
| ^~~~~~
vim +40 net/smc/smc_llc.c
23
24 struct smc_llc_hdr {
25 struct smc_wr_rx_hdr common;
26 union {
27 struct {
28 u8 length; /* 44 */
29 #if defined(__BIG_ENDIAN_BITFIELD)
30 u8 reserved:4,
31 add_link_rej_rsn:4;
32 #elif defined(__LITTLE_ENDIAN_BITFIELD)
33 u8 add_link_rej_rsn:4,
34 reserved:4;
35 #endif
36 };
37 u16 length_v2; /* 44 - 8192*/
38 };
39 u8 flags;
> 40 } __packed; /* format defined in
41 * IBM Shared Memory Communications Version 2
42 * (https://www.ibm.com/support/pages/node/6326337)
43 */
44
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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