[kbuild-all] Re: arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:633:12: error: no previous prototype for 'kvm_arch_post_init_vm'
Rong Chen
rong.a.chen at intel.com
Fri Sep 18 01:46:20 EDT 2020
On 9/12/20 2:52 PM, Paolo Bonzini wrote:
> On 11/09/20 13:43, kernel test robot wrote:
>>>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:633:12: error: no previous prototype for 'kvm_arch_post_init_vm' [-Werror=missing-prototypes]
>> 633 | int __weak kvm_arch_post_init_vm(struct kvm *kvm)
>> | ^~~~~~~~~~~~~~~~~~~~~
>>>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:642:13: error: no previous prototype for 'kvm_arch_pre_destroy_vm' [-Werror=missing-prototypes]
>> 642 | void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm)
>> | ^~~~~~~~~~~~~~~~~~~~~~~
>> cc1: all warnings being treated as errors
> This makes little sense, the prototypes are in include/linux/kvm_host.h
> Also this code is not architecture-dependent...
>
> kvm-ppc guys, can you reproduce it?
Hi Paolo,
The error can be reproduced with W=1:
$ make W=1
CROSS_COMPILE=/home/nfs/0day/gcc-9.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-
ARCH=powerpc M=arch/powerpc/kvm | grep kvm_main
CC [M] arch/powerpc/kvm/../../../virt/kvm/kvm_main.o
arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:633:12: warning: no
previous prototype for 'kvm_arch_post_init_vm' [-Wmissing-prototypes]
633 | int __weak kvm_arch_post_init_vm(struct kvm *kvm)
| ^~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:642:13: warning: no
previous prototype for 'kvm_arch_pre_destroy_vm' [-Wmissing-prototypes]
642 | void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm)
| ^~~~~~~~~~~~~~~~~~~~~~~
Best Regards,
Rong Chen
>
> Paolo
>
>>
>> Hi Junaid,
>>
>> FYI, the error/warning still remains.
>>
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: e5bd0d2afe7061562c483d301e4aabb51b13fcfa
>> commit: 1aa9b9572b10529c2e64e2b8f44025d86e124308 kvm: x86: mmu: Recovery of shattered NX large pages
>> date: 10 months ago
>> config: powerpc-defconfig (attached as .config)
>> compiler: powerpc64-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
>> git checkout 1aa9b9572b10529c2e64e2b8f44025d86e124308
>> # save the attached .config to linux build tree
>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp at intel.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:633:12: error: no previous prototype for 'kvm_arch_post_init_vm' [-Werror=missing-prototypes]
>> 633 | int __weak kvm_arch_post_init_vm(struct kvm *kvm)
>> | ^~~~~~~~~~~~~~~~~~~~~
>>>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:642:13: error: no previous prototype for 'kvm_arch_pre_destroy_vm' [-Werror=missing-prototypes]
>> 642 | void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm)
>> | ^~~~~~~~~~~~~~~~~~~~~~~
>> cc1: all warnings being treated as errors
>>
>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1aa9b9572b10529c2e64e2b8f44025d86e124308
>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> git fetch --no-tags linus xlnx/master
>> git checkout 1aa9b9572b10529c2e64e2b8f44025d86e124308
>> vim +/kvm_arch_post_init_vm +633 arch/powerpc/kvm/../../../virt/kvm/kvm_main.c
>>
>> 628
>> 629 /*
>> 630 * Called after the VM is otherwise initialized, but just before adding it to
>> 631 * the vm_list.
>> 632 */
>> > 633 int __weak kvm_arch_post_init_vm(struct kvm *kvm)
>> 634 {
>> 635 return 0;
>> 636 }
>> 637
>> 638 /*
>> 639 * Called just after removing the VM from the vm_list, but before doing any
>> 640 * other destruction.
>> 641 */
>> > 642 void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm)
>> 643 {
>> 644 }
>> 645
>>
>> ---
>> 0-DAY CI Kernel Test Service, Intel Corporation
>> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>>
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