tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   bb578c9c690d8a5525dafc52d442af18aee45280
commit: c5e151b580c322247a23827f53576261e598f26e [27/223] mm/cma: ake kmemleak ignore CMA regions
config: x86_64-randconfig-ha1-1024 (attached as .config)
reproduce:
  git checkout c5e151b580c322247a23827f53576261e598f26e
  # save the attached .config to linux build tree
  make ARCH=x86_64 

All error/warnings:

   mm/cma.c: In function 'cma_declare_contiguous':
>> mm/cma.c:283:4: error: implicit declaration of function 'phys_to_virt' [-Werror=implicit-function-declaration]
       kmemleak_ignore(phys_to_virt(addr));
       ^
>> mm/cma.c:283:4: warning: passing argument 1 of 'kmemleak_ignore' makes pointer from integer without a cast
   In file included from include/linux/slab.h:106:0,
                    from mm/cma.c:32:
   include/linux/kmemleak.h:93:20: note: expected 'const void *' but argument is of type 'int'
    static inline void kmemleak_ignore(const void *ptr)
                       ^
   cc1: some warnings being treated as errors

vim +/phys_to_virt +283 mm/cma.c

   277			phys_addr_t addr = memblock_alloc_range(size, alignment, base,
   278								limit);
   279			if (!addr) {
   280				ret = -ENOMEM;
   281				goto err;
   282			} else {
 > 283				kmemleak_ignore(phys_to_virt(addr));
   284				base = addr;
   285			}
   286		}

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