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Sat, 11 Jun 2022 16:13:20 +0000 Date: Sun, 12 Jun 2022 00:12:25 +0800 From: kernel test robot To: Arnd Bergmann Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: arch/arm/mm/copypage-feroceon.c:65:6: warning: no previous prototype for 'feroceon_copy_user_highpage' Message-ID: <202206120025.LnzrdX8M-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Arnd, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0885eacdc81f920c3e0554d5615e69a66504a28d commit: 7036440eab3e2d47a775d4616909f8235488d714 ARM: omap1: enable multiplatform date: 8 days ago config: arm-randconfig-r004-20220611 (https://download.01.org/0day-ci/archive/20220612/202206120025.LnzrdX8M-lkp@intel.com/config) compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7036440eab3e2d47a775d4616909f8235488d714 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 7036440eab3e2d47a775d4616909f8235488d714 # 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=arm SHELL=/bin/bash arch/arm/mach-lpc32xx/ arch/arm/mach-versatile/ arch/arm/mm/ drivers/cpufreq/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/arm/mm/copypage-feroceon.c:65:6: warning: no previous prototype for 'feroceon_copy_user_highpage' [-Wmissing-prototypes] 65 | void feroceon_copy_user_highpage(struct page *to, struct page *from, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/arm/mm/copypage-feroceon.c:78:6: warning: no previous prototype for 'feroceon_clear_user_highpage' [-Wmissing-prototypes] 78 | void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- >> arch/arm/mach-lpc32xx/serial.c:63:6: warning: no previous prototype for 'lpc32xx_loopback_set' [-Wmissing-prototypes] 63 | void lpc32xx_loopback_set(resource_size_t mapbase, int state) | ^~~~~~~~~~~~~~~~~~~~ -- >> arch/arm/mach-versatile/versatile.c:56:14: warning: no previous prototype for 'mmc_status' [-Wmissing-prototypes] 56 | unsigned int mmc_status(struct device *dev) | ^~~~~~~~~~ -- >> drivers/cpufreq/davinci-cpufreq.c:151:12: warning: no previous prototype for 'davinci_cpufreq_init' [-Wmissing-prototypes] 151 | int __init davinci_cpufreq_init(void) | ^~~~~~~~~~~~~~~~~~~~ vim +/feroceon_copy_user_highpage +65 arch/arm/mm/copypage-feroceon.c d73e60b7144a86 Russell King 2008-10-31 64 063b0a4207e43a Russell King 2008-10-31 @65 void feroceon_copy_user_highpage(struct page *to, struct page *from, f00a75c094c340 Russell King 2009-10-05 66 unsigned long vaddr, struct vm_area_struct *vma) 063b0a4207e43a Russell King 2008-10-31 67 { 063b0a4207e43a Russell King 2008-10-31 68 void *kto, *kfrom; 063b0a4207e43a Russell King 2008-10-31 69 5472e862de2bc4 Cong Wang 2011-11-25 70 kto = kmap_atomic(to); 5472e862de2bc4 Cong Wang 2011-11-25 71 kfrom = kmap_atomic(from); 2725898fc9bb21 Russell King 2009-10-05 72 flush_cache_page(vma, vaddr, page_to_pfn(from)); 063b0a4207e43a Russell King 2008-10-31 73 feroceon_copy_user_page(kto, kfrom); 5472e862de2bc4 Cong Wang 2011-11-25 74 kunmap_atomic(kfrom); 5472e862de2bc4 Cong Wang 2011-11-25 75 kunmap_atomic(kto); 063b0a4207e43a Russell King 2008-10-31 76 } 063b0a4207e43a Russell King 2008-10-31 77 303c6443659bc1 Russell King 2008-10-31 @78 void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr) d73e60b7144a86 Russell King 2008-10-31 79 { 5472e862de2bc4 Cong Wang 2011-11-25 80 void *ptr, *kaddr = kmap_atomic(page); 43ae286b7d4d8c Nicolas Pitre 2008-11-04 81 asm volatile ("\ 43ae286b7d4d8c Nicolas Pitre 2008-11-04 82 mov r1, %2 \n\ d73e60b7144a86 Russell King 2008-10-31 83 mov r2, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 84 mov r3, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 85 mov r4, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 86 mov r5, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 87 mov r6, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 88 mov r7, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 89 mov ip, #0 \n\ d73e60b7144a86 Russell King 2008-10-31 90 mov lr, #0 \n\ 303c6443659bc1 Russell King 2008-10-31 91 1: stmia %0, {r2-r7, ip, lr} \n\ d73e60b7144a86 Russell King 2008-10-31 92 subs r1, r1, #1 \n\ 303c6443659bc1 Russell King 2008-10-31 93 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\ 43ae286b7d4d8c Nicolas Pitre 2008-11-04 94 add %0, %0, #32 \n\ d73e60b7144a86 Russell King 2008-10-31 95 bne 1b \n\ 303c6443659bc1 Russell King 2008-10-31 96 mcr p15, 0, r1, c7, c10, 4 @ drain WB" 43ae286b7d4d8c Nicolas Pitre 2008-11-04 97 : "=r" (ptr) 43ae286b7d4d8c Nicolas Pitre 2008-11-04 98 : "0" (kaddr), "I" (PAGE_SIZE / 32) 303c6443659bc1 Russell King 2008-10-31 99 : "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr"); 5472e862de2bc4 Cong Wang 2011-11-25 100 kunmap_atomic(kaddr); d73e60b7144a86 Russell King 2008-10-31 101 } d73e60b7144a86 Russell King 2008-10-31 102 :::::: The code at line 65 was first introduced by commit :::::: 063b0a4207e43acbeff3d4b09f43e750e0212b48 [ARM] copypage: provide our own copy_user_highpage() :::::: TO: Russell King :::::: CC: Russell King -- 0-DAY CI Kernel Test Service https://01.org/lkp