[gerg-m68knommu:armnommu 3/3] arch/arm/mm/alignment.c:776:25: sparse: sparse: incorrect type in argument 1 (different address spaces)

[gerg-m68knommu:armnommu 3/3] arch/arm/mm/alignment.c:776:25: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git armnommu
head:   edf19f0aab57e81f4391d800d6845527413ca77b
commit: edf19f0aab57e81f4391d800d6845527413ca77b [3/3] ARM: versatile: support configuring versatile machine for no-MMU
config: arm-randconfig-r111-20251228 (https://download.01.org/0day-ci/archive/20251228/202512281641.zItti8ka-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251228/202512281641.zItti8ka-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/202512281641.zItti8ka-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/arm/mm/alignment.c:776:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned int [usertype] *ip @@
   arch/arm/mm/alignment.c:776:25: sparse:     expected void const volatile [noderef] __user *ptr
   arch/arm/mm/alignment.c:776:25: sparse:     got unsigned int [usertype] *ip
>> arch/arm/mm/alignment.c:791:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __user *ptr @@     got unsigned short [usertype] *ip @@
   arch/arm/mm/alignment.c:791:25: sparse:     expected void const volatile [noderef] __user *ptr
   arch/arm/mm/alignment.c:791:25: sparse:     got unsigned short [usertype] *ip

vim +776 arch/arm/mm/alignment.c

c2860d43f5dfab George G. Davis   2009-06-04  769  
1bb9fb0a147f9d Russell King      2019-09-06  770  static int alignment_get_arm(struct pt_regs *regs, u32 *ip, u32 *inst)
67e15fa5b487ad Russell King      2019-08-31  771  {
67e15fa5b487ad Russell King      2019-08-31  772  	u32 instr = 0;
67e15fa5b487ad Russell King      2019-08-31  773  	int fault;
67e15fa5b487ad Russell King      2019-08-31  774  
67e15fa5b487ad Russell King      2019-08-31  775  	if (user_mode(regs))
67e15fa5b487ad Russell King      2019-08-31 @776  		fault = get_user(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  777  	else
25f12ae45fc193 Christoph Hellwig 2020-06-17  778  		fault = get_kernel_nofault(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  779  
67e15fa5b487ad Russell King      2019-08-31  780  	*inst = __mem_to_opcode_arm(instr);
67e15fa5b487ad Russell King      2019-08-31  781  
67e15fa5b487ad Russell King      2019-08-31  782  	return fault;
67e15fa5b487ad Russell King      2019-08-31  783  }
67e15fa5b487ad Russell King      2019-08-31  784  
67e15fa5b487ad Russell King      2019-08-31  785  static int alignment_get_thumb(struct pt_regs *regs, u16 *ip, u16 *inst)
67e15fa5b487ad Russell King      2019-08-31  786  {
67e15fa5b487ad Russell King      2019-08-31  787  	u16 instr = 0;
67e15fa5b487ad Russell King      2019-08-31  788  	int fault;
67e15fa5b487ad Russell King      2019-08-31  789  
67e15fa5b487ad Russell King      2019-08-31  790  	if (user_mode(regs))
67e15fa5b487ad Russell King      2019-08-31 @791  		fault = get_user(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  792  	else
25f12ae45fc193 Christoph Hellwig 2020-06-17  793  		fault = get_kernel_nofault(instr, ip);
67e15fa5b487ad Russell King      2019-08-31  794  
67e15fa5b487ad Russell King      2019-08-31  795  	*inst = __mem_to_opcode_thumb16(instr);
67e15fa5b487ad Russell King      2019-08-31  796  
67e15fa5b487ad Russell King      2019-08-31  797  	return fault;
67e15fa5b487ad Russell King      2019-08-31  798  }
67e15fa5b487ad Russell King      2019-08-31  799  

:::::: The code at line 776 was first introduced by commit
:::::: 67e15fa5b487adb9b78a92789eeff2d6ec8f5cee ARM: mm: fix alignment handler faults under memory pressure

:::::: TO: Russell King <rmk+kernel@armlinux.org.uk>
:::::: CC: Russell King <rmk+kernel@armlinux.org.uk>

-- 
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