[opencloudos:next 79/98] kernel/sysctl.c:580:54: sparse: sparse: incorrect type in argument 3 (different address spaces)

[opencloudos:next 79/98] kernel/sysctl.c:580:54: sparse: sparse: incorrect type in argument 3 (different address spaces)

[kernel test robot]

tree:   https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git next
head:   1a77a557522cf821eb3cb19959da7093902866ed
commit: 8f985ca9fe5f441dfaf6824bc08222f91f34a10c [79/98] pagecachelimit: limit the pagecache ratio of totalram
config: x86_64-randconfig-122-20240419 (https://download.01.org/0day-ci/archive/20240419/202404190235.b0TftmFJ-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240419/202404190235.b0TftmFJ-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/202404190235.b0TftmFJ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/sysctl.c:580:54: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void * @@     got void [noderef] __user *buffer @@
   kernel/sysctl.c:580:54: sparse:     expected void *
   kernel/sysctl.c:580:54: sparse:     got void [noderef] __user *buffer
   kernel/sysctl.c:592:54: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void * @@     got void [noderef] __user *buffer @@
   kernel/sysctl.c:592:54: sparse:     expected void *
   kernel/sysctl.c:592:54: sparse:     got void [noderef] __user *buffer
   kernel/sysctl.c:610:54: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void * @@     got void [noderef] __user *buffer @@
   kernel/sysctl.c:610:54: sparse:     expected void *
   kernel/sysctl.c:610:54: sparse:     got void [noderef] __user *buffer
   kernel/sysctl.c:967:47: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *buffer @@     got void [noderef] __user *buffer @@
   kernel/sysctl.c:967:47: sparse:     expected void *buffer
   kernel/sysctl.c:967:47: sparse:     got void [noderef] __user *buffer
   kernel/sysctl.c:954:5: sparse: sparse: symbol 'proc_dointvec_max_map_count' was not declared. Should it be static?
   kernel/sysctl.c:1127:45: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *buffer @@     got void [noderef] __user *buffer @@
   kernel/sysctl.c:1127:45: sparse:     expected void *buffer
   kernel/sysctl.c:1127:45: sparse:     got void [noderef] __user *buffer
   kernel/sysctl.c:1885:35: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@     expected int ( [usertype] *proc_handler )( ... ) @@     got int ( * )( ... ) @@
   kernel/sysctl.c:1885:35: sparse:     expected int ( [usertype] *proc_handler )( ... )
   kernel/sysctl.c:1885:35: sparse:     got int ( * )( ... )
   kernel/sysctl.c:2294:35: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@     expected int ( [usertype] *proc_handler )( ... ) @@     got int ( * )( ... ) @@
   kernel/sysctl.c:2294:35: sparse:     expected int ( [usertype] *proc_handler )( ... )
   kernel/sysctl.c:2294:35: sparse:     got int ( * )( ... )
   kernel/sysctl.c:2419:36: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@     expected int ( [usertype] *proc_handler )( ... ) @@     got int ( * )( ... ) @@
   kernel/sysctl.c:2419:36: sparse:     expected int ( [usertype] *proc_handler )( ... )
   kernel/sysctl.c:2419:36: sparse:     got int ( * )( ... )
   kernel/sysctl.c:2428:36: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@     expected int ( [usertype] *proc_handler )( ... ) @@     got int ( * )( ... ) @@
   kernel/sysctl.c:2428:36: sparse:     expected int ( [usertype] *proc_handler )( ... )
   kernel/sysctl.c:2428:36: sparse:     got int ( * )( ... )
   kernel/sysctl.c:2444:36: sparse: sparse: incorrect type in initializer (incompatible argument 3 (different address spaces)) @@     expected int ( [usertype] *proc_handler )( ... ) @@     got int ( * )( ... ) @@
   kernel/sysctl.c:2444:36: sparse:     expected int ( [usertype] *proc_handler )( ... )
   kernel/sysctl.c:2444:36: sparse:     got int ( * )( ... )
   kernel/sysctl.c:317:66: sparse: sparse: self-comparison always evaluates to false

vim +580 kernel/sysctl.c

   576	
   577	static int pc_limit_proc_dointvec(struct ctl_table *table, int write,
   578					  void __user *buffer, size_t *lenp, loff_t *ppos)
   579	{
 > 580		int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
   581	
   582		if (write && !ret)
   583			ret = setup_pagecache_limit();
   584	
   585		return ret;
   586	}
   587	

-- 
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https://github.com/intel/lkp-tests/wiki