RE: [Devel] [pm:acpica-osl 6/6] drivers/acpi/osl.c:1748:46: sparse: sparse: incorrect type in assignment (different address spaces)

["Moore, Robert" <robert.moore@intel.com>]

I believe the file " drivers/acpi/osl.c " is part of the core linux, not ACPICA.

-----Original Message-----
From: kernel test robot <lkp@intel.com> 
Sent: Saturday, September 05, 2020 11:34 AM
To: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: kbuild-all@lists.01.org; linux-acpi@vger.kernel.org; devel@acpica.org; linux-pm@vger.kernel.org
Subject: [Devel] [pm:acpica-osl 6/6] drivers/acpi/osl.c:1748:46: sparse: sparse: incorrect type in assignment (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git acpica-osl
head:   c32c3c4079f8a62616413abbead45b6622fb7602
commit: c32c3c4079f8a62616413abbead45b6622fb7602 [6/6] ACPI: OSL: Make ACPICA use logical addresses of GPE blocks
config: x86_64-randconfig-s022-20200904 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-191-g10164920-dirty
        git checkout c32c3c4079f8a62616413abbead45b6622fb7602
        # 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@intel.com>


sparse warnings: (new ones prefixed by >>)

   drivers/acpi/osl.c:376:17: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/acpi/osl.c:1748:46: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *extern [addressable] [toplevel] acpi_gbl_xgpe0_block_logical_address @@     got void [noderef] __iomem * @@
>> drivers/acpi/osl.c:1748:46: sparse:     expected void *extern [addressable] [toplevel] acpi_gbl_xgpe0_block_logical_address
   drivers/acpi/osl.c:1748:46: sparse:     got void [noderef] __iomem *
>> drivers/acpi/osl.c:1750:46: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *extern [addressable] [toplevel] acpi_gbl_xgpe1_block_logical_address @@     got void [noderef] __iomem * @@
>> drivers/acpi/osl.c:1750:46: sparse:     expected void *extern [addressable] [toplevel] acpi_gbl_xgpe1_block_logical_address
   drivers/acpi/osl.c:1750:46: sparse:     got void [noderef] __iomem *
   drivers/acpi/osl.c:1760:20: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *rv @@     got void [noderef] __iomem * @@
   drivers/acpi/osl.c:1760:20: sparse:     expected void *rv
   drivers/acpi/osl.c:1760:20: sparse:     got void [noderef] __iomem *
   drivers/acpi/osl.c:708:1: sparse: sparse: context imbalance in 'acpi_os_read_memory' - wrong count at exit
   drivers/acpi/osl.c:741:1: sparse: sparse: context imbalance in 'acpi_os_write_memory' - wrong count at exit

# https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?id=c32c3c4079f8a62616413abbead45b6622fb7602
git remote add pm https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
git fetch --no-tags pm acpica-osl
git checkout c32c3c4079f8a62616413abbead45b6622fb7602
vim +1748 drivers/acpi/osl.c

  1742	
  1743	acpi_status __init acpi_os_initialize(void)
  1744	{
  1745		acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
  1746		acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
  1747	
> 1748		acpi_gbl_xgpe0_block_logical_address =
  1749			acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
> 1750		acpi_gbl_xgpe1_block_logical_address =
  1751			acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
  1752	
  1753		if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
  1754			/*
  1755			 * Use acpi_os_map_generic_address to pre-map the reset
  1756			 * register if it's in system memory.
  1757			 */
  1758			void *rv;
  1759	
  1760			rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
  1761			pr_debug(PREFIX "%s: map reset_reg %s\n", __func__,
  1762				 rv ? "successful" : "failed");
  1763		}
  1764		acpi_os_initialized = true;
  1765	
  1766		return AE_OK;
  1767	}
  1768	

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