* [linux-stable-rc:linux-4.19.y 2415/4776] arch/riscv/include/asm/processor.h:82:2: error: implicit declaration of function 'barrier'
@ 2021-06-20 0:44 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-06-20 0:44 UTC (permalink / raw)
To: Arvind Sankar
Cc: kbuild-all, Greg Kroah-Hartman, Randy Dunlap, Andrew Morton,
Linux Memory Management List, Nick Desaulniers, Kees Cook
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Hi Arvind,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
head: 050ebdeaa48830852f690696606997b274af7148
commit: b207caff4176e3a6ba273243da2db2e595e4aad2 [2415/4776] compiler.h: fix barrier_data() on clang
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=b207caff4176e3a6ba273243da2db2e595e4aad2
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-4.19.y
git checkout b207caff4176e3a6ba273243da2db2e595e4aad2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from include/linux/prefetch.h:15,
from drivers/net/ethernet/intel/i40e/i40e_txrx.c:4:
arch/riscv/include/asm/processor.h: In function 'cpu_relax':
>> arch/riscv/include/asm/processor.h:82:2: error: implicit declaration of function 'barrier' [-Werror=implicit-function-declaration]
82 | barrier();
| ^~~~~~~
In file included from include/linux/sctp.h:57,
from drivers/net/ethernet/intel/i40e/i40e.h:23,
from drivers/net/ethernet/intel/i40e/i40e_txrx.c:8:
include/uapi/linux/sctp.h: At top level:
include/uapi/linux/sctp.h:390:1: warning: alignment 4 of 'struct sctp_paddr_change' is less than 8 [-Wpacked-not-aligned]
390 | } __attribute__((packed, aligned(4)));
| ^
include/uapi/linux/sctp.h:719:1: warning: alignment 4 of 'struct sctp_setpeerprim' is less than 8 [-Wpacked-not-aligned]
719 | } __attribute__((packed, aligned(4)));
| ^
include/uapi/linux/sctp.h:718:26: warning: 'sspp_addr' offset 4 in 'struct sctp_setpeerprim' isn't aligned to 8 [-Wpacked-not-aligned]
718 | struct sockaddr_storage sspp_addr;
| ^~~~~~~~~
include/uapi/linux/sctp.h:732:1: warning: alignment 4 of 'struct sctp_prim' is less than 8 [-Wpacked-not-aligned]
732 | } __attribute__((packed, aligned(4)));
| ^
include/uapi/linux/sctp.h:731:26: warning: 'ssp_addr' offset 4 in 'struct sctp_prim' isn't aligned to 8 [-Wpacked-not-aligned]
731 | struct sockaddr_storage ssp_addr;
| ^~~~~~~~
include/uapi/linux/sctp.h:783:1: warning: alignment 4 of 'struct sctp_paddrparams' is less than 8 [-Wpacked-not-aligned]
783 | } __attribute__((packed, aligned(4)));
| ^
include/uapi/linux/sctp.h:775:26: warning: 'spp_address' offset 4 in 'struct sctp_paddrparams' isn't aligned to 8 [-Wpacked-not-aligned]
775 | struct sockaddr_storage spp_address;
| ^~~~~~~~~~~
include/uapi/linux/sctp.h:896:1: warning: alignment 4 of 'struct sctp_paddrinfo' is less than 8 [-Wpacked-not-aligned]
896 | } __attribute__((packed, aligned(4)));
| ^
include/uapi/linux/sctp.h:890:26: warning: 'spinfo_address' offset 4 in 'struct sctp_paddrinfo' isn't aligned to 8 [-Wpacked-not-aligned]
890 | struct sockaddr_storage spinfo_address;
| ^~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/barrier +82 arch/riscv/include/asm/processor.h
7db91e57a0acde Palmer Dabbelt 2017-07-10 73
7db91e57a0acde Palmer Dabbelt 2017-07-10 74
7db91e57a0acde Palmer Dabbelt 2017-07-10 75 static inline void cpu_relax(void)
7db91e57a0acde Palmer Dabbelt 2017-07-10 76 {
7db91e57a0acde Palmer Dabbelt 2017-07-10 77 #ifdef __riscv_muldiv
7db91e57a0acde Palmer Dabbelt 2017-07-10 78 int dummy;
7db91e57a0acde Palmer Dabbelt 2017-07-10 79 /* In lieu of a halt instruction, induce a long-latency stall. */
7db91e57a0acde Palmer Dabbelt 2017-07-10 80 __asm__ __volatile__ ("div %0, %0, zero" : "=r" (dummy));
7db91e57a0acde Palmer Dabbelt 2017-07-10 81 #endif
7db91e57a0acde Palmer Dabbelt 2017-07-10 @82 barrier();
7db91e57a0acde Palmer Dabbelt 2017-07-10 83 }
7db91e57a0acde Palmer Dabbelt 2017-07-10 84
:::::: The code at line 82 was first introduced by commit
:::::: 7db91e57a0acde126a162ababfb1e0ab190130cb RISC-V: Task implementation
:::::: TO: Palmer Dabbelt <palmer@dabbelt.com>
:::::: CC: Palmer Dabbelt <palmer@dabbelt.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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