tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f1b785f4c7870c42330b35522c2514e39a1e28e7 commit: b8ee299855f08539e04d6c1a6acb3dc9e5423c00 fs/proc: fix compile warning about variable 'vmcore_mmap_ops' date: 6 days ago config: riscv-randconfig-r071-20241113 (https://download.01.org/0day-ci/archive/20241114/202411140156.2o0nS4fl-lkp@xxxxxxxxx/config) compiler: riscv32-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241114/202411140156.2o0nS4fl-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/202411140156.2o0nS4fl-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> fs/proc/vmcore.c:424:19: warning: 'mmap_vmcore_fault' defined but not used [-Wunused-function] 424 | static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) | ^~~~~~~~~~~~~~~~~ vim +/mmap_vmcore_fault +424 fs/proc/vmcore.c 9cb218131de1c59 Michael Holzheu 2013-09-11 416 9cb218131de1c59 Michael Holzheu 2013-09-11 417 /* 9cb218131de1c59 Michael Holzheu 2013-09-11 418 * The vmcore fault handler uses the page cache and fills data using the 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 419) * standard __read_vmcore() function. 9cb218131de1c59 Michael Holzheu 2013-09-11 420 * 9cb218131de1c59 Michael Holzheu 2013-09-11 421 * On s390 the fault handler is used for memory regions that can't be mapped 9cb218131de1c59 Michael Holzheu 2013-09-11 422 * directly with remap_pfn_range(). 9cb218131de1c59 Michael Holzheu 2013-09-11 423 */ 36f062042b0fd9f Souptick Joarder 2018-08-21 @424 static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) 9cb218131de1c59 Michael Holzheu 2013-09-11 425 { 9cb218131de1c59 Michael Holzheu 2013-09-11 426 #ifdef CONFIG_S390 11bac80004499ea Dave Jiang 2017-02-24 427 struct address_space *mapping = vmf->vma->vm_file->f_mapping; 9cb218131de1c59 Michael Holzheu 2013-09-11 428 pgoff_t index = vmf->pgoff; 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 429) struct iov_iter iter; 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 430) struct kvec kvec; 9cb218131de1c59 Michael Holzheu 2013-09-11 431 struct page *page; 9cb218131de1c59 Michael Holzheu 2013-09-11 432 loff_t offset; 9cb218131de1c59 Michael Holzheu 2013-09-11 433 int rc; 9cb218131de1c59 Michael Holzheu 2013-09-11 434 9cb218131de1c59 Michael Holzheu 2013-09-11 435 page = find_or_create_page(mapping, index, GFP_KERNEL); 9cb218131de1c59 Michael Holzheu 2013-09-11 436 if (!page) 9cb218131de1c59 Michael Holzheu 2013-09-11 437 return VM_FAULT_OOM; 9cb218131de1c59 Michael Holzheu 2013-09-11 438 if (!PageUptodate(page)) { 09cbfeaf1a5a67b Kirill A. Shutemov 2016-04-01 439 offset = (loff_t) index << PAGE_SHIFT; 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 440) kvec.iov_base = page_address(page); 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 441) kvec.iov_len = PAGE_SIZE; de4eda9de2d957e Al Viro 2022-09-15 442 iov_iter_kvec(&iter, ITER_DEST, &kvec, 1, PAGE_SIZE); 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 443) 4a22fd20379ca89 Matthew Wilcox (Oracle 2022-04-29 444) rc = __read_vmcore(&iter, &offset); 9cb218131de1c59 Michael Holzheu 2013-09-11 445 if (rc < 0) { 9cb218131de1c59 Michael Holzheu 2013-09-11 446 unlock_page(page); 09cbfeaf1a5a67b Kirill A. Shutemov 2016-04-01 447 put_page(page); b5c212374c85353 Souptick Joarder 2018-10-30 448 return vmf_error(rc); 9cb218131de1c59 Michael Holzheu 2013-09-11 449 } 9cb218131de1c59 Michael Holzheu 2013-09-11 450 SetPageUptodate(page); 9cb218131de1c59 Michael Holzheu 2013-09-11 451 } 9cb218131de1c59 Michael Holzheu 2013-09-11 452 unlock_page(page); 9cb218131de1c59 Michael Holzheu 2013-09-11 453 vmf->page = page; 9cb218131de1c59 Michael Holzheu 2013-09-11 454 return 0; 9cb218131de1c59 Michael Holzheu 2013-09-11 455 #else 9cb218131de1c59 Michael Holzheu 2013-09-11 456 return VM_FAULT_SIGBUS; 9cb218131de1c59 Michael Holzheu 2013-09-11 457 #endif 9cb218131de1c59 Michael Holzheu 2013-09-11 458 } 9cb218131de1c59 Michael Holzheu 2013-09-11 459 :::::: The code at line 424 was first introduced by commit :::::: 36f062042b0fd9f8e41b97a472f52139886ca26f fs/proc/vmcore.c: use new typedef vm_fault_t :::::: TO: Souptick Joarder <jrdr.linux@xxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
