linux-kernel - [avpatel:virtio_rpmsg_bus_fix_v1 35/52] arch/riscv/include/asm/tlbflush.h:33:1: error: type defaults to 'int' in declaration of 'DECLARE_STATIC_KEY

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Date:   Fri, 10 Jun 2022 12:26:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mayuresh Chitale <mchitale@...tanamicro.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Anup Patel <anup@...infault.org>
Subject: [avpatel:virtio_rpmsg_bus_fix_v1 35/52]
 arch/riscv/include/asm/tlbflush.h:33:1: error: type defaults to 'int' in
 declaration of 'DECLARE_STATIC_KEY_FALSE'

tree:   https://github.com/avpatel/linux.git virtio_rpmsg_bus_fix_v1
head:   390aaf641ff2f8919268d611e864227265c3f3f2
commit: efaaec7bcbaf3346e07955be46d5e3c2bd662167 [35/52] riscv: mm: use svinval instructions instead of sfence.vma
config: riscv-randconfig-r002-20220609 (https://download.01.org/0day-ci/archive/20220610/202206101257.TRD6p5sy-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.3.0
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
        # https://github.com/avpatel/linux/commit/efaaec7bcbaf3346e07955be46d5e3c2bd662167
        git remote add avpatel https://github.com/avpatel/linux.git
        git fetch --no-tags avpatel virtio_rpmsg_bus_fix_v1
        git checkout efaaec7bcbaf3346e07955be46d5e3c2bd662167
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash net/ipv4/

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

All error/warnings (new ones prefixed by >>):

   In file included from arch/riscv/include/asm/pgtable.h:108,
                    from arch/riscv/include/asm/uaccess.h:12,
                    from include/linux/uaccess.h:11,
                    from include/linux/sched/task.h:11,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:33,
                    from include/linux/compat.h:17,
                    from arch/riscv/include/asm/elf.h:12,
                    from include/linux/elf.h:6,
                    from include/linux/module.h:19,
                    from net/ipv4/route.c:63:
>> arch/riscv/include/asm/tlbflush.h:33:1: warning: data definition has no type or storage class
      33 | DECLARE_STATIC_KEY_FALSE(riscv_flush_tlb_svinval);
         | ^~~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/include/asm/tlbflush.h:33:1: error: type defaults to 'int' in declaration of 'DECLARE_STATIC_KEY_FALSE' [-Werror=implicit-int]
>> arch/riscv/include/asm/tlbflush.h:33:1: warning: parameter names (without types) in function declaration
   net/ipv4/route.c: In function 'ip_rt_send_redirect':
   net/ipv4/route.c:880:13: warning: variable 'log_martians' set but not used [-Wunused-but-set-variable]
     880 |         int log_martians;
         |             ^~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from arch/riscv/include/asm/pgtable.h:108,
                    from arch/riscv/include/asm/uaccess.h:12,
                    from include/linux/uaccess.h:11,
                    from include/linux/sched/task.h:11,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:33,
                    from include/linux/compat.h:17,
                    from arch/riscv/include/asm/elf.h:12,
                    from include/linux/elf.h:6,
                    from include/linux/module.h:19,
                    from net/ipv4/inetpeer.c:10:
>> arch/riscv/include/asm/tlbflush.h:33:1: warning: data definition has no type or storage class
      33 | DECLARE_STATIC_KEY_FALSE(riscv_flush_tlb_svinval);
         | ^~~~~~~~~~~~~~~~~~~~~~~~
>> arch/riscv/include/asm/tlbflush.h:33:1: error: type defaults to 'int' in declaration of 'DECLARE_STATIC_KEY_FALSE' [-Werror=implicit-int]
>> arch/riscv/include/asm/tlbflush.h:33:1: warning: parameter names (without types) in function declaration
   cc1: some warnings being treated as errors


vim +33 arch/riscv/include/asm/tlbflush.h

    31	
    32	/* Check if we can use sinval for tlb flush */
  > 33	DECLARE_STATIC_KEY_FALSE(riscv_flush_tlb_svinval);
    34	#define riscv_use_flush_tlb_svinval() \
    35		static_branch_unlikely(&riscv_flush_tlb_svinval)
    36	

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