tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9e21984d62c56a0f6d1fc6f76b646212cfd7fe88 commit: e88b85b81d5313a69cb62829b957d4a9ecde600b [12999/13245] mm: vmalloc: offload free_vmap_area_lock lock config: m68k-defconfig (https://download.01.org/0day-ci/archive/20240111/202401111810.TKPIXLCs-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401111810.TKPIXLCs-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202401111810.TKPIXLCs-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): mm/vmalloc.c: In function 'vmalloc_dump_obj': >> mm/vmalloc.c:4652:22: warning: 'addr' is used uninitialized [-Wuninitialized] 4652 | va = __find_vmap_area(addr, &vn->busy.root); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/vmalloc.c:4645:23: note: 'addr' was declared here 4645 | unsigned long addr; | ^~~~ vim +/addr +4652 mm/vmalloc.c a10aa579878fc6 Christoph Lameter 2008-04-28 4637 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4638 #ifdef CONFIG_PRINTK 98f180837a896e Paul E. McKenney 2020-12-08 4639 bool vmalloc_dump_obj(void *object) 98f180837a896e Paul E. McKenney 2020-12-08 4640 { 98f180837a896e Paul E. McKenney 2020-12-08 4641 void *objp = (void *)PAGE_ALIGN((unsigned long)object); 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4642) const void *caller; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4643) struct vmap_area *va; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4644) struct vmap_node *vn; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4645) unsigned long addr; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4646) unsigned int nr_pages; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4647) bool success = false; 98f180837a896e Paul E. McKenney 2020-12-08 4648 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4649) vn = addr_to_node((unsigned long)objp); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4650) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4651) if (spin_trylock(&vn->busy.lock)) { 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 @4652) va = __find_vmap_area(addr, &vn->busy.root); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4653) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4654) if (va && va->vm) { 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4655) addr = (unsigned long)va->vm->addr; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4656) caller = va->vm->caller; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4657) nr_pages = va->vm->nr_pages; 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4658) success = true; 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4659) } 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4660) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4661) spin_unlock(&vn->busy.lock); 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4662) } 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4663) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4664) if (success) bd34dcd4120d7e Paul E. McKenney 2020-12-09 4665 pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n", 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4666) nr_pages, addr, caller); 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4667) 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4668) return success; 98f180837a896e Paul E. McKenney 2020-12-08 4669 } 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4670 #endif 98f180837a896e Paul E. McKenney 2020-12-08 4671 :::::: The code at line 4652 was first introduced by commit :::::: 86817057732a9ce9cefdb6f513b6554a55ebbbbb mm: vmalloc: remove global vmap_area_root rb-tree :::::: TO: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx> :::::: CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
