linux-kernel - arch/x86/include/asm/io.h:422:27: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Sun, 3 Jan 2021 03:28:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dave Jiang <dave.jiang@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Borislav Petkov <bp@...e.de>, Tony Luck <tony.luck@...el.com>
Subject: arch/x86/include/asm/io.h:422:27: sparse: sparse: incorrect type in
 argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   eda809aef53426d044b519405d25d9da55319b76
commit: 0888e1030d3e3e5ce9dfd8e030cf13a2e9a1519a x86/asm: Carve out a generic movdir64b() helper for general usage
date:   3 months ago
config: x86_64-randconfig-s031-20210103 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0888e1030d3e3e5ce9dfd8e030cf13a2e9a1519a
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 0888e1030d3e3e5ce9dfd8e030cf13a2e9a1519a
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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


"sparse warnings: (new ones prefixed by >>)"
   drivers/dma/idxd/submit.c: note: in included file (through include/linux/io.h, include/linux/pci.h):
>> arch/x86/include/asm/io.h:422:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *dst @@     got void [noderef] __iomem *dst @@
   arch/x86/include/asm/io.h:422:27: sparse:     expected void *dst
   arch/x86/include/asm/io.h:422:27: sparse:     got void [noderef] __iomem *dst

vim +422 arch/x86/include/asm/io.h

   398	
   399	extern bool phys_mem_access_encrypted(unsigned long phys_addr,
   400					      unsigned long size);
   401	
   402	/**
   403	 * iosubmit_cmds512 - copy data to single MMIO location, in 512-bit units
   404	 * @dst: destination, in MMIO space (must be 512-bit aligned)
   405	 * @src: source
   406	 * @count: number of 512 bits quantities to submit
   407	 *
   408	 * Submit data from kernel space to MMIO space, in units of 512 bits at a
   409	 * time.  Order of access is not guaranteed, nor is a memory barrier
   410	 * performed afterwards.
   411	 *
   412	 * Warning: Do not use this helper unless your driver has checked that the CPU
   413	 * instruction is supported on the platform.
   414	 */
   415	static inline void iosubmit_cmds512(void __iomem *dst, const void *src,
   416					    size_t count)
   417	{
   418		const u8 *from = src;
   419		const u8 *end = from + count * 64;
   420	
   421		while (from < end) {
 > 422			movdir64b(dst, from);
   423			from += 64;
   424		}
   425	}
   426	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (38324 bytes)