tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 84e57d292203a45c96dbcb2e6be9dd80961d981a commit: 250c1a694ff304e5d69e74ab32755eddcc2b8f65 ARM: pxa: convert to multiplatform date: 7 months ago config: arm-randconfig-r023-20221216 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=250c1a694ff304e5d69e74ab32755eddcc2b8f65 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 250c1a694ff304e5d69e74ab32755eddcc2b8f65 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mach-imx/ arch/arm/mach-spear/ arch/arm/mm/ 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-v4wt.c:43:6: warning: no previous prototype for function 'v4wt_copy_user_highpage' [-Wmissing-prototypes] void v4wt_copy_user_highpage(struct page *to, struct page *from, ^ arch/arm/mm/copypage-v4wt.c:43:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4wt_copy_user_highpage(struct page *to, struct page *from, ^ static >> arch/arm/mm/copypage-v4wt.c:60:6: warning: no previous prototype for function 'v4wt_clear_user_highpage' [-Wmissing-prototypes] void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) ^ arch/arm/mm/copypage-v4wt.c:60:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) ^ static 2 warnings generated. -- >> arch/arm/mm/copypage-v4wb.c:47:6: warning: no previous prototype for function 'v4wb_copy_user_highpage' [-Wmissing-prototypes] void v4wb_copy_user_highpage(struct page *to, struct page *from, ^ arch/arm/mm/copypage-v4wb.c:47:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4wb_copy_user_highpage(struct page *to, struct page *from, ^ static >> arch/arm/mm/copypage-v4wb.c:65:6: warning: no previous prototype for function 'v4wb_clear_user_highpage' [-Wmissing-prototypes] void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr) ^ arch/arm/mm/copypage-v4wb.c:65:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr) ^ static 2 warnings generated. -- >> arch/arm/mm/copypage-xscale.c:84:6: warning: no previous prototype for function 'xscale_mc_copy_user_highpage' [-Wmissing-prototypes] void xscale_mc_copy_user_highpage(struct page *to, struct page *from, ^ arch/arm/mm/copypage-xscale.c:84:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void xscale_mc_copy_user_highpage(struct page *to, struct page *from, ^ static >> arch/arm/mm/copypage-xscale.c:107:1: warning: no previous prototype for function 'xscale_mc_clear_user_highpage' [-Wmissing-prototypes] xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr) ^ arch/arm/mm/copypage-xscale.c:106:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ^ static 2 warnings generated. -- >> arch/arm/mach-imx/cpu-imx25.c:40:5: warning: no previous prototype for function 'mx25_revision' [-Wmissing-prototypes] int mx25_revision(void) ^ arch/arm/mach-imx/cpu-imx25.c:40:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int mx25_revision(void) ^ static 1 warning generated. -- >> arch/arm/mach-imx/pm-imx25.c:31:13: warning: no previous prototype for function 'imx25_pm_init' [-Wmissing-prototypes] void __init imx25_pm_init(void) ^ arch/arm/mach-imx/pm-imx25.c:31:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init imx25_pm_init(void) ^ static 1 warning generated. -- >> arch/arm/mach-spear/pl080.c:30:5: warning: no previous prototype for function 'pl080_get_signal' [-Wmissing-prototypes] int pl080_get_signal(const struct pl08x_channel_data *cd) ^ arch/arm/mach-spear/pl080.c:30:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int pl080_get_signal(const struct pl08x_channel_data *cd) ^ static >> arch/arm/mach-spear/pl080.c:65:6: warning: no previous prototype for function 'pl080_put_signal' [-Wmissing-prototypes] void pl080_put_signal(const struct pl08x_channel_data *cd, int signal) ^ arch/arm/mach-spear/pl080.c:65:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void pl080_put_signal(const struct pl08x_channel_data *cd, int signal) ^ static 2 warnings generated. vim +/v4wt_copy_user_highpage +43 arch/arm/mm/copypage-v4wt.c d73e60b7144a86 Russell King 2008-10-31 42 063b0a4207e43a Russell King 2008-10-31 @43 void v4wt_copy_user_highpage(struct page *to, struct page *from, f00a75c094c340 Russell King 2009-10-05 44 unsigned long vaddr, struct vm_area_struct *vma) 063b0a4207e43a Russell King 2008-10-31 45 { 063b0a4207e43a Russell King 2008-10-31 46 void *kto, *kfrom; 063b0a4207e43a Russell King 2008-10-31 47 5472e862de2bc4 Cong Wang 2011-11-25 48 kto = kmap_atomic(to); 5472e862de2bc4 Cong Wang 2011-11-25 49 kfrom = kmap_atomic(from); 063b0a4207e43a Russell King 2008-10-31 50 v4wt_copy_user_page(kto, kfrom); 5472e862de2bc4 Cong Wang 2011-11-25 51 kunmap_atomic(kfrom); 5472e862de2bc4 Cong Wang 2011-11-25 52 kunmap_atomic(kto); 063b0a4207e43a Russell King 2008-10-31 53 } 063b0a4207e43a Russell King 2008-10-31 54 d73e60b7144a86 Russell King 2008-10-31 55 /* d73e60b7144a86 Russell King 2008-10-31 56 * ARMv4 optimised clear_user_page d73e60b7144a86 Russell King 2008-10-31 57 * d73e60b7144a86 Russell King 2008-10-31 58 * Same story as above. d73e60b7144a86 Russell King 2008-10-31 59 */ 303c6443659bc1 Russell King 2008-10-31 @60 void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) d73e60b7144a86 Russell King 2008-10-31 61 { 5472e862de2bc4 Cong Wang 2011-11-25 62 void *ptr, *kaddr = kmap_atomic(page); 43ae286b7d4d8c Nicolas Pitre 2008-11-04 63 asm volatile("\ 43ae286b7d4d8c Nicolas Pitre 2008-11-04 64 mov r1, %2 @ 1\n\ d73e60b7144a86 Russell King 2008-10-31 65 mov r2, #0 @ 1\n\ d73e60b7144a86 Russell King 2008-10-31 66 mov r3, #0 @ 1\n\ d73e60b7144a86 Russell King 2008-10-31 67 mov ip, #0 @ 1\n\ d73e60b7144a86 Russell King 2008-10-31 68 mov lr, #0 @ 1\n\ 303c6443659bc1 Russell King 2008-10-31 69 1: stmia %0!, {r2, r3, ip, lr} @ 4\n\ 303c6443659bc1 Russell King 2008-10-31 70 stmia %0!, {r2, r3, ip, lr} @ 4\n\ 303c6443659bc1 Russell King 2008-10-31 71 stmia %0!, {r2, r3, ip, lr} @ 4\n\ 303c6443659bc1 Russell King 2008-10-31 72 stmia %0!, {r2, r3, ip, lr} @ 4\n\ d73e60b7144a86 Russell King 2008-10-31 73 subs r1, r1, #1 @ 1\n\ d73e60b7144a86 Russell King 2008-10-31 74 bne 1b @ 1\n\ 303c6443659bc1 Russell King 2008-10-31 75 mcr p15, 0, r2, c7, c7, 0 @ flush ID cache" 43ae286b7d4d8c Nicolas Pitre 2008-11-04 76 : "=r" (ptr) 43ae286b7d4d8c Nicolas Pitre 2008-11-04 77 : "0" (kaddr), "I" (PAGE_SIZE / 64) 303c6443659bc1 Russell King 2008-10-31 78 : "r1", "r2", "r3", "ip", "lr"); 5472e862de2bc4 Cong Wang 2011-11-25 79 kunmap_atomic(kaddr); d73e60b7144a86 Russell King 2008-10-31 80 } d73e60b7144a86 Russell King 2008-10-31 81 :::::: The code at line 43 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