Re: [PATCH v6 net-next 1/5] net: add generic per-cpu page_pool allocator

[kernel test robot <lkp@intel.com>]

Hi Lorenzo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Bianconi/net-add-generic-per-cpu-page_pool-allocator/20240128-222506
base:   net-next/main
patch link:    https://lore.kernel.org/r/5b0222d3df382c22fe0fa96154ae7b27189f7ecd.1706451150.git.lorenzo%40kernel.org
patch subject: [PATCH v6 net-next 1/5] net: add generic per-cpu page_pool allocator
config: sparc-randconfig-r123-20240129 (https://download.01.org/0day-ci/archive/20240129/202401291436.jz59b9EZ-lkp@intel.com/config)
compiler: sparc-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20240129/202401291436.jz59b9EZ-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/202401291436.jz59b9EZ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> net/core/dev.c:447:1: sparse: sparse: symbol '__pcpu_scope_page_pool' was not declared. Should it be static?
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected unsigned int [usertype] val @@     got restricted __wsum @@
   net/core/dev.c:3352:23: sparse:     expected unsigned int [usertype] val
   net/core/dev.c:3352:23: sparse:     got restricted __wsum
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: cast from restricted __wsum
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: cast from restricted __wsum
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: cast from restricted __wsum
   net/core/dev.c:3352:23: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted __wsum [usertype] csum @@     got unsigned int @@
   net/core/dev.c:3352:23: sparse:     expected restricted __wsum [usertype] csum
   net/core/dev.c:3352:23: sparse:     got unsigned int
   net/core/dev.c:3352:23: sparse: sparse: cast from restricted __wsum
   net/core/dev.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
   net/core/dev.c:205:9: sparse: sparse: context imbalance in 'unlist_netdevice' - different lock contexts for basic block
   net/core/dev.c:3792:17: sparse: sparse: context imbalance in '__dev_queue_xmit' - different lock contexts for basic block
   net/core/dev.c:5172:17: sparse: sparse: context imbalance in 'net_tx_action' - different lock contexts for basic block
   net/core/dev.c:8833:38: sparse: sparse: self-comparison always evaluates to false

vim +/__pcpu_scope_page_pool +447 net/core/dev.c

   446	
 > 447	DEFINE_PER_CPU_ALIGNED(struct page_pool *, page_pool);
   448	

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