[rppt:execmem/v4+x86-rox 21/22] mm/execmem.c:192:2: error: call to undeclared function 'flush_tlb_kernel_range'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git execmem/v4+x86-rox
head:   a14551111ff8bbf3c520771e89892d599463da71
commit: 85e04aa7ae67c997077a12fc9e6ed04fbc2d6975 [21/22] execmem: add support for cache of large ROX pages
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240410/202404101125.Ne2NU3YV-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 8b3b4a92adee40483c27f26c478a384cd69c6f05)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240410/202404101125.Ne2NU3YV-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404101125.Ne2NU3YV-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/execmem.c:3:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from mm/execmem.c:11:
   In file included from mm/internal.h:12:
   In file included from include/linux/pagemap.h:11:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from mm/execmem.c:11:
   In file included from mm/internal.h:12:
   In file included from include/linux/pagemap.h:11:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from mm/execmem.c:11:
   In file included from mm/internal.h:12:
   In file included from include/linux/pagemap.h:11:
   In file included from include/linux/highmem.h:12:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
>> mm/execmem.c:192:2: error: call to undeclared function 'flush_tlb_kernel_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     192 |         flush_tlb_kernel_range(start, end);
         |         ^
   7 warnings and 1 error generated.


vim +/flush_tlb_kernel_range +192 mm/execmem.c

   166	
   167	static int execmem_cache_populate(struct execmem_range *range, size_t size)
   168	{
   169		unsigned long vm_flags = VM_FLUSH_RESET_PERMS | VM_ALLOW_HUGE_VMAP;
   170		unsigned long start, end;
   171		struct vm_struct *vm;
   172		size_t alloc_size;
   173		int err = -ENOMEM;
   174		void *p;
   175	
   176		alloc_size = round_up(size, PMD_SIZE);
   177		p = execmem_vmalloc(range, alloc_size, PAGE_KERNEL, vm_flags);
   178		if (!p)
   179			return err;
   180	
   181		vm = find_vm_area(p);
   182		if (!vm)
   183			goto err_free_mem;
   184	
   185		/* fill memory with invalid instructions */
   186		execmem_invalidate(p, alloc_size, /* writable = */ true);
   187	
   188		start = (unsigned long)p;
   189		end = start + alloc_size;
   190	
   191		vunmap_range_noflush(start, end);
 > 192		flush_tlb_kernel_range(start, end);
   193	
   194		/* FIXME: handle direct map alias */
   195	
   196		err = vmap_pages_range_noflush(start, end, range->pgprot, vm->pages,
   197					       PMD_SHIFT);
   198		if (err)
   199			goto err_free_mem;
   200	
   201		err = execmem_cache_add(p, alloc_size);
   202		if (err)
   203			goto err_free_mem;
   204	
   205		return 0;
   206	
   207	err_free_mem:
   208		vfree(p);
   209		return err;
   210	}
   211	

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