[openeuler:openEuler-1.0-LTS 1355/1355] include/linux/share_pool.h:150:26: sparse: sparse: incorrect type in return expression (different address spaces)
tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 773f731853f1368508a0b112047bd9b5a4bb9a5e commit: 4a280fac30d27ae2aff096f9f99aa12d50f83426 [1355/1355] ascend: share_pool: support share pool features for ascend platform config: arm64-randconfig-r133-20241227 (https://download.01.org/0day-ci/archive/20241228/202412281933.AtwopaHj-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20241228/202412281933.AtwopaHj-lkp@i...)
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/202412281933.AtwopaHj-lkp@intel.com/
sparse warnings: (new ones prefixed by >>) mm/gup.c: note: in included file:
include/linux/share_pool.h:150:26: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct task_struct * @@ got struct task_struct [noderef] __rcu *owner @@
include/linux/share_pool.h:150:26: sparse: expected struct task_struct * include/linux/share_pool.h:150:26: sparse: got struct task_struct [noderef] __rcu *owner mm/gup.c:1769:47: sparse: sparse: self-comparison always evaluates to false mm/gup.c:1794:47: sparse: sparse: self-comparison always evaluates to false mm/gup.c:1830:6: warning: no previous prototype for 'gup_fast_permitted' [-Wmissing-prototypes] 1830 | bool gup_fast_permitted(unsigned long start, int nr_pages, int write) | ^~~~~~~~~~~~~~~~~~
vim +150 include/linux/share_pool.h
2facb5901ceebe Ding Tianhong 2021-10-30 146 2facb5901ceebe Ding Tianhong 2021-10-30 147 static inline struct task_struct *sp_get_task(struct mm_struct *mm) 2facb5901ceebe Ding Tianhong 2021-10-30 148 { 2facb5901ceebe Ding Tianhong 2021-10-30 149 if (enable_ascend_share_pool) 2facb5901ceebe Ding Tianhong 2021-10-30 @150 return mm->owner; 2facb5901ceebe Ding Tianhong 2021-10-30 151 else 2facb5901ceebe Ding Tianhong 2021-10-30 152 return current; 2facb5901ceebe Ding Tianhong 2021-10-30 153 } 2facb5901ceebe Ding Tianhong 2021-10-30 154
:::::: The code at line 150 was first introduced by commit :::::: 2facb5901ceebe6736c0d192ca50be5d26c70ad9 ascend: vmalloc: export new function for share pool
:::::: TO: Ding Tianhong dingtianhong@huawei.com :::::: CC: Yang Yingliang yangyingliang@huawei.com
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kernel test robot