* [linux-next:master 7236/7588] mm/util.c:999:2: error: statement requires expression of scalar type ('void' invalid)
@ 2021-03-29 7:21 kernel test robot
2021-03-30 0:38 ` Andrew Morton
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2021-03-29 7:21 UTC (permalink / raw)
To: Joe Perches
Cc: kbuild-all, clang-built-linux, Linux Memory Management List,
Andrew Morton
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 931294922e65a23e1aad6398b9ae02df74044679
commit: d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3 [7236/7588] mm/util.c: reduce mem_dump_obj() object size
config: riscv-randconfig-r034-20210328 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 821547cabb5819ed42245376a9afcd11cdee5ddd)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>):
arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
#define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from mm/util.c:13:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outb(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
#define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
#define writeb_cpu(v, c) ((void)__raw_writeb((v), (c)))
^
In file included from mm/util.c:13:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outw(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
#define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
#define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
^
In file included from mm/util.c:13:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outl(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
#define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
#define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
^
In file included from mm/util.c:13:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:10:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
In file included from mm/util.c:29:
mm/internal.h:454:8: error: use of undeclared identifier 'max_mapnr'
if (!pfn_valid(pfn))
^
arch/riscv/include/asm/page.h:130:62: note: expanded from macro 'pfn_valid'
(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
^
mm/util.c:999:6: error: use of undeclared identifier 'max_mapnr'
if (virt_addr_valid(object))
^
arch/riscv/include/asm/page.h:137:43: note: expanded from macro 'virt_addr_valid'
(unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
^
arch/riscv/include/asm/page.h:130:62: note: expanded from macro 'pfn_valid'
(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
^
>> mm/util.c:999:2: error: statement requires expression of scalar type ('void' invalid)
if (virt_addr_valid(object))
^ ~~~~~~~~~~~~~~~~~~~~~~~
7 warnings and 3 errors generated.
vim +999 mm/util.c
975
976 /**
977 * mem_dump_obj - Print available provenance information
978 * @object: object for which to find provenance information.
979 *
980 * This function uses pr_cont(), so that the caller is expected to have
981 * printed out whatever preamble is appropriate. The provenance information
982 * depends on the type of object and on how much debugging is enabled.
983 * For example, for a slab-cache object, the slab name is printed, and,
984 * if available, the return address and stack trace from the allocation
985 * and last free path of that object.
986 */
987 void mem_dump_obj(void *object)
988 {
989 const char *type;
990
991 if (kmem_valid_obj(object)) {
992 kmem_dump_obj(object);
993 return;
994 }
995
996 if (vmalloc_dump_obj(object))
997 return;
998
> 999 if (virt_addr_valid(object))
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [linux-next:master 7236/7588] mm/util.c:999:2: error: statement requires expression of scalar type ('void' invalid)
2021-03-29 7:21 [linux-next:master 7236/7588] mm/util.c:999:2: error: statement requires expression of scalar type ('void' invalid) kernel test robot
@ 2021-03-30 0:38 ` Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2021-03-30 0:38 UTC (permalink / raw)
To: kernel test robot
Cc: Joe Perches, kbuild-all, clang-built-linux,
Linux Memory Management List, Paul Walmsley, Palmer Dabbelt,
Albert Ou
On Mon, 29 Mar 2021 15:21:47 +0800 kernel test robot <lkp@intel.com> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: 931294922e65a23e1aad6398b9ae02df74044679
> commit: d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3 [7236/7588] mm/util.c: reduce mem_dump_obj() object size
> config: riscv-randconfig-r034-20210328 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 821547cabb5819ed42245376a9afcd11cdee5ddd)
> 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 riscv cross compiling tool for clang build
> # apt-get install binutils-riscv64-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3
> git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> git fetch --no-tags linux-next master
> git checkout d1f75d5ddea82b2c610d194d253b4d4ecdaa6be3
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
>
> ...
>
> ~~~~~~~~~~ ^
> In file included from mm/util.c:29:
> mm/internal.h:454:8: error: use of undeclared identifier 'max_mapnr'
> if (!pfn_valid(pfn))
> ^
> arch/riscv/include/asm/page.h:130:62: note: expanded from macro 'pfn_valid'
> (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
> ^
> mm/util.c:999:6: error: use of undeclared identifier 'max_mapnr'
> if (virt_addr_valid(object))
> ^
> arch/riscv/include/asm/page.h:137:43: note: expanded from macro 'virt_addr_valid'
> (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
> ^
> arch/riscv/include/asm/page.h:130:62: note: expanded from macro 'pfn_valid'
> (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
> ^
> >> mm/util.c:999:2: error: statement requires expression of scalar type ('void' invalid)
> if (virt_addr_valid(object))
> ^ ~~~~~~~~~~~~~~~~~~~~~~~
> 7 warnings and 3 errors generated.
"mm/util.c: reduce mem_dump_obj() object size" can't be the cause of this.
It appears that riscv doesn't handle CONFIG_NEED_MULTIPLE_NODES=y. Its
pfn_valid() (and hence virt_addr_valid()) implementations require that
max_mapnr be defined and implemented. But with
CONFIG_NEED_MULTIPLE_NODES=y, that is not the case.
Probably riscv needs some Kconfig fix to disallow this config combination.
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2021-03-30 0:38 ` Andrew Morton
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