Hi Uladzislau, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.5] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Uladzislau-Rezki-Sony/mm-vmalloc-Add-va_alloc-helper/20230829-161248 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230829081142.3619-5-urezki%40gmail.com patch subject: [PATCH v2 4/9] mm: vmalloc: Remove global vmap_area_root rb-tree config: csky-randconfig-r024-20230829 (https://download.01.org/0day-ci/archive/20230829/202308292228.RRrGUYyB-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308292228.RRrGUYyB-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/202308292228.RRrGUYyB-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): mm/vmalloc.c: In function 'vmap_init_free_space': >> mm/vmalloc.c:4506:45: warning: ordered comparison of pointer with integer zero [-Wextra] 4506 | if (busy->addr - vmap_start > 0) { | ^ vim +4506 mm/vmalloc.c 4491 4492 static void vmap_init_free_space(void) 4493 { 4494 unsigned long vmap_start = 1; 4495 const unsigned long vmap_end = ULONG_MAX; 4496 struct vmap_area *free; 4497 struct vm_struct *busy; 4498 4499 /* 4500 * B F B B B F 4501 * -|-----|.....|-----|-----|-----|.....|- 4502 * | The KVA space | 4503 * |<--------------------------------->| 4504 */ 4505 for (busy = vmlist; busy; busy = busy->next) { > 4506 if (busy->addr - vmap_start > 0) { 4507 free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT); 4508 if (!WARN_ON_ONCE(!free)) { 4509 free->va_start = vmap_start; 4510 free->va_end = (unsigned long) busy->addr; 4511 4512 insert_vmap_area_augment(free, NULL, 4513 &free_vmap_area_root, 4514 &free_vmap_area_list); 4515 } 4516 } 4517 4518 vmap_start = (unsigned long) busy->addr + busy->size; 4519 } 4520 4521 if (vmap_end - vmap_start > 0) { 4522 free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT); 4523 if (!WARN_ON_ONCE(!free)) { 4524 free->va_start = vmap_start; 4525 free->va_end = vmap_end; 4526 4527 insert_vmap_area_augment(free, NULL, 4528 &free_vmap_area_root, 4529 &free_vmap_area_list); 4530 } 4531 } 4532 } 4533 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
