* Re: [PATCH] mm/vmalloc: clarify why vmap_range_noflush() might sleep
[not found] <20251208-b4-vmalloc-might_alloc-v1-1-94a9bb8ecb08@google.com>
@ 2025-12-09 1:52 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-12-09 1:52 UTC (permalink / raw)
To: Brendan Jackman, Andrew Morton, Uladzislau Rezki
Cc: llvm, oe-kbuild-all, Linux Memory Management List, linux-kernel,
Brendan Jackman
Hi Brendan,
kernel test robot noticed the following build errors:
[auto build test ERROR on ecc46e02e0abe025a6e840cba2d647f23fd1d721]
url: https://github.com/intel-lab-lkp/linux/commits/Brendan-Jackman/mm-vmalloc-clarify-why-vmap_range_noflush-might-sleep/20251208-132202
base: ecc46e02e0abe025a6e840cba2d647f23fd1d721
patch link: https://lore.kernel.org/r/20251208-b4-vmalloc-might_alloc-v1-1-94a9bb8ecb08%40google.com
patch subject: [PATCH] mm/vmalloc: clarify why vmap_range_noflush() might sleep
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20251209/202512090959.BWqYaOOg-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512090959.BWqYaOOg-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512090959.BWqYaOOg-lkp@intel.com/
All errors (new ones prefixed by >>):
>> mm/vmalloc.c:308:14: error: use of undeclared identifier 'GFP_PGTABLE_KERNEL'
308 | might_alloc(GFP_PGTABLE_KERNEL);
| ^
1 error generated.
vim +/GFP_PGTABLE_KERNEL +308 mm/vmalloc.c
297
298 static int vmap_range_noflush(unsigned long addr, unsigned long end,
299 phys_addr_t phys_addr, pgprot_t prot,
300 unsigned int max_page_shift)
301 {
302 pgd_t *pgd;
303 unsigned long start;
304 unsigned long next;
305 int err;
306 pgtbl_mod_mask mask = 0;
307
> 308 might_alloc(GFP_PGTABLE_KERNEL);
309 BUG_ON(addr >= end);
310
311 start = addr;
312 pgd = pgd_offset_k(addr);
313 do {
314 next = pgd_addr_end(addr, end);
315 err = vmap_p4d_range(pgd, addr, next, phys_addr, prot,
316 max_page_shift, &mask);
317 if (err)
318 break;
319 } while (pgd++, phys_addr += (next - addr), addr = next, addr != end);
320
321 if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
322 arch_sync_kernel_mappings(start, end);
323
324 return err;
325 }
326
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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