Re: [PATCH v2 1/4] mm: define MAX_PTRS_PER_{PTE,PMD,PUD}

kbuild test robot
2019-12-10T10:39:49Z

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Hi Daniel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20191209]
[also build test WARNING on linus/master v5.5-rc1]
[cannot apply to powerpc/next asm-generic/master v5.4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Daniel-Axtens/KASAN-for-powerpc64-radix-plus-generic-mm-change/20191210-171342
base: 6cf8298daad041cd15dc514d8a4f93ca3636c84e
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.5.0-1) 7.5.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

In file included from arch/x86/include/asm/pgtable_types.h:359:0,
from arch/x86/include/asm/processor.h:20,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
>> include/asm-generic/pgtable-nopud.h:22:0: warning: "MAX_PTRS_PER_PUD" redefined
#define MAX_PTRS_PER_PUD 1

In file included from arch/x86/include/asm/processor.h:20:0,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
arch/x86/include/asm/pgtable_types.h:261:0: note: this is the location of the previous definition
#define MAX_PTRS_PER_PUD PTRS_PER_PUD

In file included from arch/x86/include/asm/pgtable_types.h:385:0,
from arch/x86/include/asm/processor.h:20,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
>> include/asm-generic/pgtable-nopmd.h:21:0: warning: "MAX_PTRS_PER_PMD" redefined
#define MAX_PTRS_PER_PMD 1

In file included from arch/x86/include/asm/processor.h:20:0,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
arch/x86/include/asm/pgtable_types.h:262:0: note: this is the location of the previous definition
#define MAX_PTRS_PER_PMD PTRS_PER_PMD

--
In file included from arch/x86/include/asm/pgtable_types.h:359:0,
from arch/x86/include/asm/processor.h:20,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
>> include/asm-generic/pgtable-nopud.h:22:0: warning: "MAX_PTRS_PER_PUD" redefined
#define MAX_PTRS_PER_PUD 1

In file included from arch/x86/include/asm/processor.h:20:0,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
arch/x86/include/asm/pgtable_types.h:261:0: note: this is the location of the previous definition
#define MAX_PTRS_PER_PUD PTRS_PER_PUD

In file included from arch/x86/include/asm/pgtable_types.h:385:0,
from arch/x86/include/asm/processor.h:20,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
>> include/asm-generic/pgtable-nopmd.h:21:0: warning: "MAX_PTRS_PER_PMD" redefined
#define MAX_PTRS_PER_PMD 1

In file included from arch/x86/include/asm/processor.h:20:0,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:19,
from arch/x86/kernel/asm-offsets.c:9:
arch/x86/include/asm/pgtable_types.h:262:0: note: this is the location of the previous definition
#define MAX_PTRS_PER_PMD PTRS_PER_PMD

5 real 3 user 2 sys 114.30% cpu make prepare

vim +/MAX_PTRS_PER_PUD +22 include/asm-generic/pgtable-nopud.h

20
21 #define PUD_SHIFT P4D_SHIFT
> 22 #define MAX_PTRS_PER_PUD 1
23 #define PTRS_PER_PUD 1
24 #define PUD_SIZE (1UL << PUD_SHIFT)
25 #define PUD_MASK (~(PUD_SIZE-1))
26

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