arch/powerpc/mm/book3s64/pgtable.c:422:6: warning: no previous prototype for function 'arch_report_meminfo'

From: kernel test robot
Date: Thu Jul 27 2023 - 04:22:14 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0a8db05b571ad5b8d5c8774a004c0424260a90bd
commit: ef104443bffa004f631729dfc924f0b84abbd602 procfs: consolidate arch_report_meminfo declaration
date: 2 months ago
config: powerpc-microwatt_defconfig (https://download.01.org/0day-ci/archive/20230727/202307271640.lJoABLx9-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230727/202307271640.lJoABLx9-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307271640.lJoABLx9-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:155:1: note: expanded from here
155 | __do_insb
| ^
arch/powerpc/include/asm/io.h:614:56: note: expanded from macro '__do_insb'
614 | #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
| ~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/book3s64/pgtable.c:8:
In file included from include/linux/memblock.h:13:
In file included from arch/powerpc/include/asm/dma.h:22:
In file included from arch/powerpc/include/asm/io.h:677:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
45 | DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
46 | (p, b, c), pio, p)
| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:157:1: note: expanded from here
157 | __do_insw
| ^
arch/powerpc/include/asm/io.h:615:56: note: expanded from macro '__do_insw'
615 | #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
| ~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/book3s64/pgtable.c:8:
In file included from include/linux/memblock.h:13:
In file included from arch/powerpc/include/asm/dma.h:22:
In file included from arch/powerpc/include/asm/io.h:677:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
47 | DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
48 | (p, b, c), pio, p)
| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:159:1: note: expanded from here
159 | __do_insl
| ^
arch/powerpc/include/asm/io.h:616:56: note: expanded from macro '__do_insl'
616 | #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
| ~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/book3s64/pgtable.c:8:
In file included from include/linux/memblock.h:13:
In file included from arch/powerpc/include/asm/dma.h:22:
In file included from arch/powerpc/include/asm/io.h:677:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
49 | DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
50 | (p, b, c), pio, p)
| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:161:1: note: expanded from here
161 | __do_outsb
| ^
arch/powerpc/include/asm/io.h:617:58: note: expanded from macro '__do_outsb'
617 | #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
| ~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/book3s64/pgtable.c:8:
In file included from include/linux/memblock.h:13:
In file included from arch/powerpc/include/asm/dma.h:22:
In file included from arch/powerpc/include/asm/io.h:677:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
51 | DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
52 | (p, b, c), pio, p)
| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:163:1: note: expanded from here
163 | __do_outsw
| ^
arch/powerpc/include/asm/io.h:618:58: note: expanded from macro '__do_outsw'
618 | #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
| ~~~~~~~~~~~~~~~~~~~~~^
In file included from arch/powerpc/mm/book3s64/pgtable.c:8:
In file included from include/linux/memblock.h:13:
In file included from arch/powerpc/include/asm/dma.h:22:
In file included from arch/powerpc/include/asm/io.h:677:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
53 | DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
54 | (p, b, c), pio, p)
| ~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:674:3: note: expanded from macro 'DEF_PCI_AC_NORET'
674 | __do_##name al; \
| ^~~~~~~~~~~~~~
<scratch space>:165:1: note: expanded from here
165 | __do_outsl
| ^
arch/powerpc/include/asm/io.h:619:58: note: expanded from macro '__do_outsl'
619 | #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
| ~~~~~~~~~~~~~~~~~~~~~^
>> arch/powerpc/mm/book3s64/pgtable.c:422:6: warning: no previous prototype for function 'arch_report_meminfo' [-Wmissing-prototypes]
422 | void arch_report_meminfo(struct seq_file *m)
| ^
arch/powerpc/mm/book3s64/pgtable.c:422:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
422 | void arch_report_meminfo(struct seq_file *m)
| ^
| static
arch/powerpc/mm/book3s64/pgtable.c:478:5: warning: no previous prototype for function 'pmd_move_must_withdraw' [-Wmissing-prototypes]
478 | int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
| ^
arch/powerpc/mm/book3s64/pgtable.c:478:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
478 | int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
| ^
| static
14 warnings generated.

vim +/arch_report_meminfo +422 arch/powerpc/mm/book3s64/pgtable.c

a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 421
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 @422 void arch_report_meminfo(struct seq_file *m)
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 423 {
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 424 /*
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 425 * Hash maps the memory with one size mmu_linear_psize.
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 426 * So don't bother to print these on hash
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 427 */
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 428 if (!radix_enabled())
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 429 return;
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 430 seq_printf(m, "DirectMap4k: %8lu kB\n",
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 431 atomic_long_read(&direct_pages_count[MMU_PAGE_4K]) << 2);
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 432 seq_printf(m, "DirectMap64k: %8lu kB\n",
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 433 atomic_long_read(&direct_pages_count[MMU_PAGE_64K]) << 6);
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 434 seq_printf(m, "DirectMap2M: %8lu kB\n",
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 435 atomic_long_read(&direct_pages_count[MMU_PAGE_2M]) << 11);
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 436 seq_printf(m, "DirectMap1G: %8lu kB\n",
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 437 atomic_long_read(&direct_pages_count[MMU_PAGE_1G]) << 20);
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 438 }
a2dc009afa9ae8 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2018-08-13 439 #endif /* CONFIG_PROC_FS */
579b9239c1f386 arch/powerpc/mm/pgtable-book3s64.c Aneesh Kumar K.V 2019-01-23 440

:::::: The code at line 422 was first introduced by commit
:::::: a2dc009afa9ae8b92305be7728676562a104cb40 powerpc/mm/book3s/radix: Add mapping statistics

:::::: TO: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
:::::: CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx>

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Next message: Qi Zheng: "[PATCH v3 30/49] bcache: dynamically allocate the md-bcache shrinker"
Previous message: Qi Zheng: "[PATCH v3 28/49] dm zoned: dynamically allocate the dm-zoned-meta shrinker"
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