Re: [PATCH v5 1/5] Consolidate __memcpy_{to,from}io and __memset_io into iomap_copy.c

[kernel test robot <lkp@xxxxxxxxx>]

Hi Julian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on arnd-asm-generic/master]
[also build test WARNING on soc/for-next akpm-mm/mm-nonmm-unstable arm64/for-next/core linus/master v6.11 next-20240924]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Julian-Vetter/Consolidate-__memcpy_-to-from-io-and-__memset_io-into-iomap_copy-c/20240924-202154
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link:    https://lore.kernel.org/r/20240924121432.798655-2-jvetter%40kalrayinc.com
patch subject: [PATCH v5 1/5] Consolidate __memcpy_{to,from}io and __memset_io into iomap_copy.c
config: arm-mxs_defconfig (https://download.01.org/0day-ci/archive/20240925/202409250603.okc57309-lkp@xxxxxxxxx/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 7773243d9916f98ba0ffce0c3a960e4aa9f03e81)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240925/202409250603.okc57309-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409250603.okc57309-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   lib/iomap_copy.c:89:19: error: call to undeclared function 'IS_ALIGNED'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      89 |         while (count && !IS_ALIGNED((unsigned long)from, NATIVE_STORE_SIZE)) {
         |                          ^
   lib/iomap_copy.c:121:19: error: call to undeclared function 'IS_ALIGNED'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     121 |         while (count && !IS_ALIGNED((unsigned long)to, NATIVE_STORE_SIZE)) {
         |                          ^
   lib/iomap_copy.c:161:19: error: call to undeclared function 'IS_ALIGNED'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     161 |         while (count && !IS_ALIGNED((unsigned long)dst, NATIVE_STORE_SIZE)) {
         |                          ^
>> lib/iomap_copy.c:159:12: warning: shift count >= width of type [-Wshift-count-overflow]
     159 |                 qc |= qc << 32;
         |                          ^  ~~
   1 warning and 3 errors generated.


vim +159 lib/iomap_copy.c

    84	
    85	
    86	#ifndef __memcpy_fromio
    87	void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
    88	{
  > 89		while (count && !IS_ALIGNED((unsigned long)from, NATIVE_STORE_SIZE)) {
    90			*(u8 *)to = __raw_readb(from);
    91			from++;
    92			to++;
    93			count--;
    94		}
    95	
    96		while (count >= NATIVE_STORE_SIZE) {
    97	#ifdef CONFIG_64BIT
    98				put_unaligned(__raw_readq(from), (uintptr_t *)to);
    99	#else
   100				put_unaligned(__raw_readl(from), (uintptr_t *)to);
   101	#endif
   102	
   103			from += NATIVE_STORE_SIZE;
   104			to += NATIVE_STORE_SIZE;
   105			count -= NATIVE_STORE_SIZE;
   106		}
   107	
   108		while (count) {
   109			*(u8 *)to = __raw_readb(from);
   110			from++;
   111			to++;
   112			count--;
   113		}
   114	}
   115	EXPORT_SYMBOL(__memcpy_fromio);
   116	#endif
   117	
   118	#ifndef __memcpy_toio
   119	void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
   120	{
   121		while (count && !IS_ALIGNED((unsigned long)to, NATIVE_STORE_SIZE)) {
   122			__raw_writeb(*(u8 *)from, to);
   123			from++;
   124			to++;
   125			count--;
   126		}
   127	
   128		while (count >= NATIVE_STORE_SIZE) {
   129	#ifdef CONFIG_64BIT
   130				__raw_writeq(get_unaligned((uintptr_t *)from), to);
   131	#else
   132				__raw_writel(get_unaligned((uintptr_t *)from), to);
   133	#endif
   134	
   135			from += NATIVE_STORE_SIZE;
   136			to += NATIVE_STORE_SIZE;
   137			count -= NATIVE_STORE_SIZE;
   138		}
   139	
   140		while (count) {
   141			__raw_writeb(*(u8 *)from, to);
   142			from++;
   143			to++;
   144			count--;
   145		}
   146	}
   147	EXPORT_SYMBOL(__memcpy_toio);
   148	#endif
   149	
   150	#ifndef __memset_io
   151	void __memset_io(volatile void __iomem *dst, int c, size_t count)
   152	{
   153		uintptr_t qc = (u8)c;
   154	
   155		qc |= qc << 8;
   156		qc |= qc << 16;
   157	
   158		if (IS_ENABLED(CONFIG_64BIT))
 > 159			qc |= qc << 32;

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