From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild@lists.01.org
Subject: [kas:kvm-unmapped-memfd-secret 9/11] arch/s390/kvm/../../../virt/kvm/kvm_main.c:2710:23: warning: variable 'end' set but not used
Date: Fri, 08 Jan 2021 14:00:43 +0300 [thread overview]
Message-ID: <20210108110042.GC5105@kadam> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git kvm-unmapped-memfd-secret
head: ee93fab5627b827e7893a071dc59b26782eb8b28
commit: d922017493326641248b7c74b713e33f14bc8c5a [9/11] KVM: Handle secretmem
config: s390-randconfig-s031-20210108 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
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: v0.6.3-208-g46a52ca4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=d922017493326641248b7c74b713e33f14bc8c5a
git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git
git fetch --no-tags kas kvm-unmapped-memfd-secret
git checkout d922017493326641248b7c74b713e33f14bc8c5a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=s390
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 >>):
arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_share_memory':
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2710:23: warning: variable 'end' set but not used [-Wunused-but-set-variable]
2710 | unsigned long start, end;
| ^~~
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for SKB_EXTENSIONS
Depends on NET
Selected by
- KCOV && ARCH_HAS_KCOV && (CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
"sparse warnings: (new ones prefixed by >>)"
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *hva @@ got void [noderef] __iomem * @@
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: expected void *hva
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: got void [noderef] __iomem *
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void *hva @@
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: expected void volatile [noderef] __iomem *addr
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: got void *hva
vim +/end +2710 arch/s390/kvm/../../../virt/kvm/kvm_main.c
d922017493326641 Kirill A. Shutemov 2021-01-04 2707 int kvm_share_memory(struct kvm *kvm, unsigned long gfn, unsigned long npages)
d922017493326641 Kirill A. Shutemov 2021-01-04 2708 {
d922017493326641 Kirill A. Shutemov 2021-01-04 2709 struct kvm_memory_slot *memslot;
d922017493326641 Kirill A. Shutemov 2021-01-04 @2710 unsigned long start, end;
d922017493326641 Kirill A. Shutemov 2021-01-04 2711 gfn_t numpages;
d922017493326641 Kirill A. Shutemov 2021-01-04 2712 unsigned long ret;
d922017493326641 Kirill A. Shutemov 2021-01-04 2713
d922017493326641 Kirill A. Shutemov 2021-01-04 2714 if (!npages)
d922017493326641 Kirill A. Shutemov 2021-01-04 2715 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2716
d922017493326641 Kirill A. Shutemov 2021-01-04 2717 memslot = gfn_to_memslot(kvm, gfn);
d922017493326641 Kirill A. Shutemov 2021-01-04 2718 /* Not backed by memory. It's okay. */
d922017493326641 Kirill A. Shutemov 2021-01-04 2719 if (!memslot)
d922017493326641 Kirill A. Shutemov 2021-01-04 2720 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2721
d922017493326641 Kirill A. Shutemov 2021-01-04 2722 start = gfn_to_hva_many(memslot, gfn, &numpages);
d922017493326641 Kirill A. Shutemov 2021-01-04 2723 if (kvm_is_error_hva(start))
d922017493326641 Kirill A. Shutemov 2021-01-04 2724 return -KVM_EINVAL;
d922017493326641 Kirill A. Shutemov 2021-01-04 2725 end = start + npages * PAGE_SIZE;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Assignment is never used.
d922017493326641 Kirill A. Shutemov 2021-01-04 2726
d922017493326641 Kirill A. Shutemov 2021-01-04 2727 /* XXX: Share range across memory slots? */
d922017493326641 Kirill A. Shutemov 2021-01-04 2728 if (WARN_ON(numpages < npages))
d922017493326641 Kirill A. Shutemov 2021-01-04 2729 return -KVM_EINVAL;
d922017493326641 Kirill A. Shutemov 2021-01-04 2730
d922017493326641 Kirill A. Shutemov 2021-01-04 2731 ret = vm_mmap(NULL, start, npages * PAGE_SIZE, PROT_READ | PROT_WRITE,
d922017493326641 Kirill A. Shutemov 2021-01-04 2732 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0);
d922017493326641 Kirill A. Shutemov 2021-01-04 2733 if (ret != start)
d922017493326641 Kirill A. Shutemov 2021-01-04 2734 return KVM_EFAULT;
d922017493326641 Kirill A. Shutemov 2021-01-04 2735
d922017493326641 Kirill A. Shutemov 2021-01-04 2736 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2737 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
_______________________________________________
kbuild mailing list -- kbuild(a)lists.01.org
To unsubscribe send an email to kbuild-leave@lists.01.org
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WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild-all@lists.01.org
Subject: [kbuild] [kas:kvm-unmapped-memfd-secret 9/11] arch/s390/kvm/../../../virt/kvm/kvm_main.c:2710:23: warning: variable 'end' set but not used
Date: Fri, 08 Jan 2021 14:00:43 +0300 [thread overview]
Message-ID: <20210108110042.GC5105@kadam> (raw)
[-- Attachment #1: Type: text/plain, Size: 5476 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git kvm-unmapped-memfd-secret
head: ee93fab5627b827e7893a071dc59b26782eb8b28
commit: d922017493326641248b7c74b713e33f14bc8c5a [9/11] KVM: Handle secretmem
config: s390-randconfig-s031-20210108 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
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: v0.6.3-208-g46a52ca4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=d922017493326641248b7c74b713e33f14bc8c5a
git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git
git fetch --no-tags kas kvm-unmapped-memfd-secret
git checkout d922017493326641248b7c74b713e33f14bc8c5a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=s390
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 >>):
arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_share_memory':
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2710:23: warning: variable 'end' set but not used [-Wunused-but-set-variable]
2710 | unsigned long start, end;
| ^~~
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for SKB_EXTENSIONS
Depends on NET
Selected by
- KCOV && ARCH_HAS_KCOV && (CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
"sparse warnings: (new ones prefixed by >>)"
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *hva @@ got void [noderef] __iomem * @@
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: expected void *hva
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2188:21: sparse: got void [noderef] __iomem *
>> arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void *hva @@
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: expected void volatile [noderef] __iomem *addr
arch/s390/kvm/../../../virt/kvm/kvm_main.c:2242:28: sparse: got void *hva
vim +/end +2710 arch/s390/kvm/../../../virt/kvm/kvm_main.c
d922017493326641 Kirill A. Shutemov 2021-01-04 2707 int kvm_share_memory(struct kvm *kvm, unsigned long gfn, unsigned long npages)
d922017493326641 Kirill A. Shutemov 2021-01-04 2708 {
d922017493326641 Kirill A. Shutemov 2021-01-04 2709 struct kvm_memory_slot *memslot;
d922017493326641 Kirill A. Shutemov 2021-01-04 @2710 unsigned long start, end;
d922017493326641 Kirill A. Shutemov 2021-01-04 2711 gfn_t numpages;
d922017493326641 Kirill A. Shutemov 2021-01-04 2712 unsigned long ret;
d922017493326641 Kirill A. Shutemov 2021-01-04 2713
d922017493326641 Kirill A. Shutemov 2021-01-04 2714 if (!npages)
d922017493326641 Kirill A. Shutemov 2021-01-04 2715 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2716
d922017493326641 Kirill A. Shutemov 2021-01-04 2717 memslot = gfn_to_memslot(kvm, gfn);
d922017493326641 Kirill A. Shutemov 2021-01-04 2718 /* Not backed by memory. It's okay. */
d922017493326641 Kirill A. Shutemov 2021-01-04 2719 if (!memslot)
d922017493326641 Kirill A. Shutemov 2021-01-04 2720 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2721
d922017493326641 Kirill A. Shutemov 2021-01-04 2722 start = gfn_to_hva_many(memslot, gfn, &numpages);
d922017493326641 Kirill A. Shutemov 2021-01-04 2723 if (kvm_is_error_hva(start))
d922017493326641 Kirill A. Shutemov 2021-01-04 2724 return -KVM_EINVAL;
d922017493326641 Kirill A. Shutemov 2021-01-04 2725 end = start + npages * PAGE_SIZE;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Assignment is never used.
d922017493326641 Kirill A. Shutemov 2021-01-04 2726
d922017493326641 Kirill A. Shutemov 2021-01-04 2727 /* XXX: Share range across memory slots? */
d922017493326641 Kirill A. Shutemov 2021-01-04 2728 if (WARN_ON(numpages < npages))
d922017493326641 Kirill A. Shutemov 2021-01-04 2729 return -KVM_EINVAL;
d922017493326641 Kirill A. Shutemov 2021-01-04 2730
d922017493326641 Kirill A. Shutemov 2021-01-04 2731 ret = vm_mmap(NULL, start, npages * PAGE_SIZE, PROT_READ | PROT_WRITE,
d922017493326641 Kirill A. Shutemov 2021-01-04 2732 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0);
d922017493326641 Kirill A. Shutemov 2021-01-04 2733 if (ret != start)
d922017493326641 Kirill A. Shutemov 2021-01-04 2734 return KVM_EFAULT;
d922017493326641 Kirill A. Shutemov 2021-01-04 2735
d922017493326641 Kirill A. Shutemov 2021-01-04 2736 return 0;
d922017493326641 Kirill A. Shutemov 2021-01-04 2737 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
_______________________________________________
kbuild mailing list -- kbuild(a)lists.01.org
To unsubscribe send an email to kbuild-leave@lists.01.org
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next reply other threads:[~2021-01-08 11:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 11:00 Dan Carpenter [this message]
2021-01-08 11:00 ` [kbuild] [kas:kvm-unmapped-memfd-secret 9/11] arch/s390/kvm/../../../virt/kvm/kvm_main.c:2710:23: warning: variable 'end' set but not used Dan Carpenter
-- strict thread matches above, loose matches on Subject: below --
2021-01-08 10:46 kernel test robot
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