Hi Guo,

FYI, the error/warning still remains.

tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 6c3413fbf8c430b89f5d23f465e10e99ea145199 commit: bec70574669710bd0962f1f6807363915fc94f16 [2579/2579] mm/sharepool: fix hugepage_rsvd count increase error config: arm64-randconfig-004-20241213 (https://download.01.org/0day-ci/archive/20241214/202412140704.cam9C57r-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241214/202412140704.cam9C57r-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/202412140704.cam9C57r-lkp@intel.com/

All errors (new ones prefixed by >>):

mm/share_pool.c:865:23: warning: no previous prototype for 'find_spg_node_by_spg' [-Wmissing-prototypes] 865 | struct sp_group_node *find_spg_node_by_spg(struct mm_struct *mm, | ^~~~~~~~~~~~~~~~~~~~ mm/share_pool.c: In function 'sp_hugetlb_entry': mm/share_pool.c:3085:21: error: implicit declaration of function 'huge_ptep_get' [-Werror=implicit-function-declaration] 3085 | pte_t pte = huge_ptep_get(ptep); | ^~~~~~~~~~~~~ mm/share_pool.c:3085:21: error: invalid initializer mm/share_pool.c: In function 'sp_unshare_kva': mm/share_pool.c:3462:14: warning: variable 'is_hugepage' set but not used [-Wunused-but-set-variable] 3462 | bool is_hugepage = true; | ^~~~~~~~~~~ mm/share_pool.c: At top level: mm/share_pool.c:3954:6: warning: no previous prototype for 'spa_overview_show' [-Wmissing-prototypes] 3954 | void spa_overview_show(struct seq_file *seq) | ^~~~~~~~~~~~~~~~~ mm/share_pool.c:4036:6: warning: no previous prototype for 'spg_overview_show' [-Wmissing-prototypes] 4036 | void spg_overview_show(struct seq_file *seq) | ^~~~~~~~~~~~~~~~~ mm/share_pool.c: In function 'sharepool_no_page':

...

mm/share_pool.c:4227:64: error: 'HUGETLB_ALLOC_BUDDY' undeclared (first use in this function)

4227 | page = hugetlb_alloc_hugepage(node_id, HUGETLB_ALLOC_BUDDY); | ^~~~~~~~~~~~~~~~~~~ mm/share_pool.c:4227:64: note: each undeclared identifier is reported only once for each function it appears in mm/share_pool.c:4233:30: error: implicit declaration of function 'huge_pte_none'; did you mean 'huge_pte_lock'? [-Werror=implicit-function-declaration] 4233 | if (!huge_pte_none(huge_ptep_get(ptep))) { | ^~~~~~~~~~~~~ | huge_pte_lock mm/share_pool.c:4246:23: error: implicit declaration of function 'huge_add_to_page_cache'; did you mean 'add_to_page_cache'? [-Werror=implicit-function-declaration] 4246 | err = huge_add_to_page_cache(page, mapping, idx); | ^~~~~~~~~~~~~~~~~~~~~~ | add_to_page_cache mm/share_pool.c:4268:9: error: implicit declaration of function 'set_huge_pte_at'; did you mean 'set_huge_swap_pte_at'? [-Werror=implicit-function-declaration] 4268 | set_huge_pte_at(mm, haddr, ptep, new_pte); | ^~~~~~~~~~~~~~~ | set_huge_swap_pte_at mm/share_pool.c:4270:9: error: implicit declaration of function 'hugetlb_count_add'; did you mean 'hugetlb_count_sub'? [-Werror=implicit-function-declaration] 4270 | hugetlb_count_add(pages_per_huge_page(h), mm); | ^~~~~~~~~~~~~~~~~ | hugetlb_count_sub mm/share_pool.c: At top level: mm/share_pool.c:4132:12: warning: 'proc_usage_show' defined but not used [-Wunused-function] 4132 | static int proc_usage_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~~ mm/share_pool.c:4110:12: warning: 'proc_group_usage_show' defined but not used [-Wunused-function] 4110 | static int proc_group_usage_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~~~~~~~~ mm/share_pool.c:4061:12: warning: 'spa_stat_show' defined but not used [-Wunused-function] 4061 | static int spa_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors

Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PGP_KEY_PARSER Depends on [n]: CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y] && ASYMMETRIC_PUBLIC_KEY_SUBTYPE [=n] Selected by [y]: - PGP_PRELOAD [=y] && CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y]

vim +/HUGETLB_ALLOC_BUDDY +4227 mm/share_pool.c

4193 4194 vm_fault_t sharepool_no_page(struct mm_struct *mm, 4195 struct vm_area_struct *vma, 4196 struct address_space *mapping, pgoff_t idx, 4197 unsigned long address, pte_t *ptep, unsigned int flags) 4198 { 4199 struct hstate *h = hstate_vma(vma); 4200 vm_fault_t ret = VM_FAULT_SIGBUS; 4201 unsigned long size; 4202 struct page *page; 4203 pte_t new_pte; 4204 spinlock_t *ptl; 4205 unsigned long haddr = address & huge_page_mask(h); 4206 bool new_page = false; 4207 int err; 4208 int node_id; 4209 struct sp_area *spa; 4210 4211 spa = vma->vm_private_data; 4212 if (!spa) { 4213 pr_err("share pool: vma is invalid, not from sp mmap\n"); 4214 return ret; 4215 } 4216 node_id = spa->node_id; 4217 4218 retry: 4219 page = find_lock_page(mapping, idx); 4220 if (!page) { 4221 size = i_size_read(mapping->host) >> huge_page_shift(h); 4222 if (idx >= size) 4223 goto out; 4224 4225 page = alloc_huge_page(vma, haddr, 0); 4226 if (IS_ERR(page)) {

4227 page = hugetlb_alloc_hugepage(node_id, HUGETLB_ALLOC_BUDDY);

4228 if (!page) 4229 page = ERR_PTR(-ENOMEM); 4230 } 4231 if (IS_ERR(page)) { 4232 ptl = huge_pte_lock(h, mm, ptep); 4233 if (!huge_pte_none(huge_ptep_get(ptep))) { 4234 ret = 0; 4235 spin_unlock(ptl); 4236 goto out; 4237 } 4238 spin_unlock(ptl); 4239 ret = vmf_error(PTR_ERR(page)); 4240 goto out; 4241 } 4242 __SetPageUptodate(page); 4243 new_page = true; 4244 4245 /* sharepool pages are all shared */ 4246 err = huge_add_to_page_cache(page, mapping, idx); 4247 if (err) { 4248 put_page(page); 4249 if (err == -EEXIST) 4250 goto retry; 4251 goto out; 4252 } 4253 } 4254 4255 4256 ptl = huge_pte_lock(h, mm, ptep); 4257 size = i_size_read(mapping->host) >> huge_page_shift(h); 4258 if (idx >= size) 4259 goto backout; 4260 4261 ret = 0; 4262 if (!huge_pte_none(huge_ptep_get(ptep))) 4263 goto backout; 4264 4265 page_dup_rmap(page, true); 4266 new_pte = make_huge_pte(vma, page, ((vma->vm_flags & VM_WRITE) 4267 && (vma->vm_flags & VM_SHARED))); 4268 set_huge_pte_at(mm, haddr, ptep, new_pte); 4269 4270 hugetlb_count_add(pages_per_huge_page(h), mm); 4271 4272 spin_unlock(ptl); 4273 4274 if (new_page) { 4275 SetPagePrivate(&page[1]); 4276 } 4277 4278 unlock_page(page); 4279 out: 4280 return ret; 4281 4282 backout: 4283 spin_unlock(ptl); 4284 unlock_page(page); 4285 put_page(page); 4286 goto out; 4287 } 4288