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Message-ID: <202206120025.LnzrdX8M-lkp@intel.com>
Date: Sun, 12 Jun 2022 00:12:25 +0800
From: kernel test robot <lkp@...el.com>
To: Arnd Bergmann <arnd@...db.de>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: arch/arm/mm/copypage-feroceon.c:65:6: warning: no previous prototype
for 'feroceon_copy_user_highpage'
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 <lkp@...el.com>
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 <rmk@...-67.arm.linux.org.uk>
:::::: CC: Russell King <rmk+kernel@....linux.org.uk>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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