linux-kernel - include/uapi/linux/sysinfo.h:23:10: error: array is too large (18446744073709551608 elements)

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Message-ID: <202201081822.SPIpoaId-lkp@intel.com>
Date:   Sat, 8 Jan 2022 18:43:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Pintu Kumar <quic_pintu@...cinc.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, 0day robot <lkp@...el.com>,
        Pintu Agarwal <pintu.ping@...il.com>
Subject: include/uapi/linux/sysinfo.h:23:10: error: array is too large
 (18446744073709551608 elements)

tree:   https://github.com/0day-ci/linux/commits/UPDATE-20220108-020953/Pintu-Kumar/sysinfo-include-availram-field-in-sysinfo-struct/20220106-233557
head:   85f46444fa2eff4f03aeb701d44edd62af00ee44
commit: 85f46444fa2eff4f03aeb701d44edd62af00ee44 sysinfo: include availram field in sysinfo struct
date:   17 hours ago
config: s390-randconfig-r015-20220107 (https://download.01.org/0day-ci/archive/20220108/202201081822.SPIpoaId-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f3a344d2125fa37e59bae1b0874442c650a19607)
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 s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        # https://github.com/0day-ci/linux/commit/85f46444fa2eff4f03aeb701d44edd62af00ee44
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review UPDATE-20220108-020953/Pintu-Kumar/sysinfo-include-availram-field-in-sysinfo-struct/20220106-233557
        git checkout 85f46444fa2eff4f03aeb701d44edd62af00ee44
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 prepare

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from kernel/bounds.c:10:
   In file included from include/linux/page-flags.h:10:
   In file included from include/linux/bug.h:5:
   In file included from arch/s390/include/asm/bug.h:68:
   In file included from include/asm-generic/bug.h:22:
   In file included from include/linux/printk.h:9:
   In file included from include/linux/cache.h:5:
   In file included from include/uapi/linux/kernel.h:5:
>> include/uapi/linux/sysinfo.h:23:10: error: array is too large (18446744073709551608 elements)
           char _f[20-3*sizeof(__kernel_ulong_t)-sizeof(__u32)];   /* Padding: libc5 uses this.. */
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.
   make[2]: *** [scripts/Makefile.build:121: kernel/bounds.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1197: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:219: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +23 include/uapi/linux/sysinfo.h

     6	
     7	#define SI_LOAD_SHIFT	16
     8	struct sysinfo {
     9		__kernel_long_t uptime;		/* Seconds since boot */
    10		__kernel_ulong_t loads[3];	/* 1, 5, and 15 minute load averages */
    11		__kernel_ulong_t totalram;	/* Total usable main memory size */
    12		__kernel_ulong_t freeram;	/* Available memory size */
    13		__kernel_ulong_t sharedram;	/* Amount of shared memory */
    14		__kernel_ulong_t bufferram;	/* Memory used by buffers */
    15		__kernel_ulong_t totalswap;	/* Total swap space size */
    16		__kernel_ulong_t freeswap;	/* swap space still available */
    17		__u16 procs;		   	/* Number of current processes */
    18		__u16 pad;		   	/* Explicit padding for m68k */
    19		__kernel_ulong_t totalhigh;	/* Total high memory size */
    20		__kernel_ulong_t freehigh;	/* Available high memory size */
    21		__u32 mem_unit;			/* Memory unit size in bytes */
    22		__kernel_ulong_t availram;	/* Memory available for allocation */
  > 23		char _f[20-3*sizeof(__kernel_ulong_t)-sizeof(__u32)];	/* Padding: libc5 uses this.. */
    24	};
    25	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org