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Subjectarch/arm/mach-iop32x/cp6.c:10:6: warning: no previous prototype for function 'iop_enable_cp6'
Hi Arnd,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d888c83fcec75194a8a48ccd283953bdba7b2550
commit: 6f5d248d05db9c4991366154f1a657a630faa583 ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER
date: 4 months ago
config: arm-randconfig-r024-20220330 (https://download.01.org/0day-ci/archive/20220331/202203310512.uBfXEXYW-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d)
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=6f5d248d05db9c4991366154f1a657a630faa583
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 6f5d248d05db9c4991366154f1a657a630faa583
# 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=arm SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> arch/arm/mach-iop32x/cp6.c:10:6: warning: no previous prototype for function 'iop_enable_cp6' [-Wmissing-prototypes]
void iop_enable_cp6(void)
^
arch/arm/mach-iop32x/cp6.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void iop_enable_cp6(void)
^
static
arch/arm/mach-iop32x/cp6.c:43:13: warning: no previous prototype for function 'iop_init_cp6_handler' [-Wmissing-prototypes]
void __init iop_init_cp6_handler(void)
^
arch/arm/mach-iop32x/cp6.c:43:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init iop_init_cp6_handler(void)
^
static
2 warnings generated.


vim +/iop_enable_cp6 +10 arch/arm/mach-iop32x/cp6.c

9
> 10 void iop_enable_cp6(void)
11 {
12 u32 temp;
13
14 /* enable cp6 access */
15 asm volatile (
16 "mrc p15, 0, %0, c15, c1, 0\n\t"
17 "orr %0, %0, #(1 << 6)\n\t"
18 "mcr p15, 0, %0, c15, c1, 0\n\t"
19 "mrc p15, 0, %0, c15, c1, 0\n\t"
20 "mov %0, %0\n\t"
21 "sub pc, pc, #4 @ cp_wait\n\t"
22 : "=r"(temp));
23 }
24

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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