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Message-ID: <a875976b-3117-f001-606b-8e90802bef8a@intel.com>
Date: Mon, 28 Jun 2021 16:05:48 +0800
From: "Chen, Rong A" <rong.a.chen@...el.com>
To: Ilya Dryomov <idryomov@...il.com>,
kernel test robot <lkp@...el.com>
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [kbuild-all] Re: net/ceph/messenger_v2.c:2808:5: warning: stack
frame size (2336) exceeds limit (2048) in function 'ceph_con_v2_try_read'
On 6/28/2021 4:02 PM, Ilya Dryomov wrote:
> On Mon, Jun 28, 2021 at 3:25 AM kernel test robot <lkp@...el.com> wrote:
>>
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: 62fb9874f5da54fdb243003b386128037319b219
>> commit: cd1a677cad994021b19665ed476aea63f5d54f31 libceph, ceph: implement msgr2.1 protocol (crc and secure modes)
>> date: 7 months ago
>> config: powerpc64-randconfig-r034-20210628 (attached as .config)
>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 59558129276098d62046c8cda92240d292cbfb1c)
>> 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 powerpc64 cross compiling tool for clang build
>> # apt-get install binutils-powerpc64-linux-gnu
>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cd1a677cad994021b19665ed476aea63f5d54f31
>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> git fetch --no-tags linus master
>> git checkout cd1a677cad994021b19665ed476aea63f5d54f31
>> # save the attached .config to linux build tree
>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:2:1: note: expanded from here
>> __do_outl
>> ^
>> arch/powerpc/include/asm/io.h:522:62: note: expanded from macro '__do_outl'
>> #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port);
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:43:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(insb, (unsigned long p, void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:30:1: note: expanded from here
>> __do_insb
>> ^
>> arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb'
>> #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:34:1: note: expanded from here
>> __do_insw
>> ^
>> arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
>> #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:38:1: note: expanded from here
>> __do_insl
>> ^
>> arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
>> #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:42:1: note: expanded from here
>> __do_outsb
>> ^
>> arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
>> #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:46:1: note: expanded from here
>> __do_outsw
>> ^
>> arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
>> #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>> In file included from net/ceph/messenger_v2.c:17:
>> In file included from include/linux/scatterlist.h:9:
>> In file included from arch/powerpc/include/asm/io.h:604:
>> arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
>> __do_##name al; \
>> ^~~~~~~~~~~~~~
>> <scratch space>:50:1: note: expanded from here
>> __do_outsl
>> ^
>> arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
>> #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
>> ~~~~~~~~~~~~~~~~~~~~~^
>>>> net/ceph/messenger_v2.c:2808:5: warning: stack frame size (2336) exceeds limit (2048) in function 'ceph_con_v2_try_read' [-Wframe-larger-than]
>
> Same as for ceph_con_v1_try_read(), please add this instance to the
> allowlist.
Got it, thanks for the information.
Best Regards,
Rong Chen
>
> Thanks,
>
> Ilya
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