Re: [PATCH] arm64: use is_vmalloc_addr

From: kbuild test robot
Date: Thu Feb 09 2017 - 03:38:10 EST


Hi Miles,

[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on v4.10-rc7 next-20170208]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Miles-Chen/arm64-use-is_vmalloc_addr/20170209-103100
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm64

All warnings (new ones prefixed by >>):

arch/arm64/mm/ioremap.c: In function '__iounmap':
>> arch/arm64/mm/ioremap.c:91:22: warning: passing argument 1 of 'is_vmalloc_addr' makes pointer from integer without a cast [-Wint-conversion]
if (is_vmalloc_addr(addr))
^~~~
In file included from arch/arm64/mm/ioremap.c:24:0:
include/linux/mm.h:472:20: note: expected 'const void *' but argument is of type 'long unsigned int'
static inline bool is_vmalloc_addr(const void *x)
^~~~~~~~~~~~~~~

vim +/is_vmalloc_addr +91 arch/arm64/mm/ioremap.c

75
76 void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot)
77 {
78 return __ioremap_caller(phys_addr, size, prot,
79 __builtin_return_address(0));
80 }
81 EXPORT_SYMBOL(__ioremap);
82
83 void __iounmap(volatile void __iomem *io_addr)
84 {
85 unsigned long addr = (unsigned long)io_addr & PAGE_MASK;
86
87 /*
88 * We could get an address outside vmalloc range in case
89 * of ioremap_cache() reusing a RAM mapping.
90 */
> 91 if (is_vmalloc_addr(addr))
92 vunmap((void *)addr);
93 }
94 EXPORT_SYMBOL(__iounmap);
95
96 void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
97 {
98 /* For normal memory we already have a cacheable mapping. */
99 if (pfn_valid(__phys_to_pfn(phys_addr)))

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