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Message-ID: <202505251836.qXs81x9F-lkp@intel.com>
Date: Sun, 25 May 2025 19:14:52 +0800
From: kernel test robot <lkp@...el.com>
To: xur@...gle.com, Masahiro Yamada <masahiroy@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Eric Naim <dnaim@...hyos.org>,
Nicolas Schier <nicolas.schier@...ux.dev>,
Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
Bill Wendling <morbo@...gle.com>,
Justin Stitt <justinstitt@...gle.com>,
Miguel Ojeda <ojeda@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Alice Ryhl <aliceryhl@...gle.com>,
Sami Tolvanen <samitolvanen@...gle.com>,
"Mike Rapoport (Microsoft)" <rppt@...nel.org>,
Rafael Aquini <aquini@...hat.com>,
Michael Ellerman <mpe@...erman.id.au>,
Stafford Horne <shorne@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Teresa Johnson <tejohnson@...gle.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
linux-kbuild@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH v3] kbuild: distributed build support for Clang ThinLTO
Hi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on masahiroy-kbuild/for-next]
[also build test WARNING on masahiroy-kbuild/fixes linus/master v6.15-rc7 next-20250523]
[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/xur-google-com/kbuild-distributed-build-support-for-Clang-ThinLTO/20250522-053726
base: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
patch link: https://lore.kernel.org/r/20250521213534.3159514-1-xur%40google.com
patch subject: [PATCH v3] kbuild: distributed build support for Clang ThinLTO
config: arm64-randconfig-r131-20250525 (https://download.01.org/0day-ci/archive/20250525/202505251836.qXs81x9F-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce: (https://download.01.org/0day-ci/archive/20250525/202505251836.qXs81x9F-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505251836.qXs81x9F-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> mm/sparse-vmemmap.c:442:21: sparse: sparse: cast to non-scalar
>> mm/sparse-vmemmap.c:442:21: sparse: sparse: cast from non-scalar
mm/sparse-vmemmap.c: note: in included file (through include/linux/pgtable.h, include/linux/mm.h):
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast to non-scalar
arch/arm64/include/asm/pgtable.h:339:16: sparse: sparse: cast from non-scalar
vim +442 mm/sparse-vmemmap.c
2045a3b8911b6e Feiyang Chen 2022-10-27 415
2045a3b8911b6e Feiyang Chen 2022-10-27 416 int __meminit vmemmap_populate_hugepages(unsigned long start, unsigned long end,
2045a3b8911b6e Feiyang Chen 2022-10-27 417 int node, struct vmem_altmap *altmap)
2045a3b8911b6e Feiyang Chen 2022-10-27 418 {
2045a3b8911b6e Feiyang Chen 2022-10-27 419 unsigned long addr;
2045a3b8911b6e Feiyang Chen 2022-10-27 420 unsigned long next;
2045a3b8911b6e Feiyang Chen 2022-10-27 421 pgd_t *pgd;
2045a3b8911b6e Feiyang Chen 2022-10-27 422 p4d_t *p4d;
2045a3b8911b6e Feiyang Chen 2022-10-27 423 pud_t *pud;
2045a3b8911b6e Feiyang Chen 2022-10-27 424 pmd_t *pmd;
2045a3b8911b6e Feiyang Chen 2022-10-27 425
2045a3b8911b6e Feiyang Chen 2022-10-27 426 for (addr = start; addr < end; addr = next) {
2045a3b8911b6e Feiyang Chen 2022-10-27 427 next = pmd_addr_end(addr, end);
2045a3b8911b6e Feiyang Chen 2022-10-27 428
2045a3b8911b6e Feiyang Chen 2022-10-27 429 pgd = vmemmap_pgd_populate(addr, node);
2045a3b8911b6e Feiyang Chen 2022-10-27 430 if (!pgd)
2045a3b8911b6e Feiyang Chen 2022-10-27 431 return -ENOMEM;
2045a3b8911b6e Feiyang Chen 2022-10-27 432
2045a3b8911b6e Feiyang Chen 2022-10-27 433 p4d = vmemmap_p4d_populate(pgd, addr, node);
2045a3b8911b6e Feiyang Chen 2022-10-27 434 if (!p4d)
2045a3b8911b6e Feiyang Chen 2022-10-27 435 return -ENOMEM;
2045a3b8911b6e Feiyang Chen 2022-10-27 436
2045a3b8911b6e Feiyang Chen 2022-10-27 437 pud = vmemmap_pud_populate(p4d, addr, node);
2045a3b8911b6e Feiyang Chen 2022-10-27 438 if (!pud)
2045a3b8911b6e Feiyang Chen 2022-10-27 439 return -ENOMEM;
2045a3b8911b6e Feiyang Chen 2022-10-27 440
2045a3b8911b6e Feiyang Chen 2022-10-27 441 pmd = pmd_offset(pud, addr);
2045a3b8911b6e Feiyang Chen 2022-10-27 @442 if (pmd_none(READ_ONCE(*pmd))) {
2045a3b8911b6e Feiyang Chen 2022-10-27 443 void *p;
2045a3b8911b6e Feiyang Chen 2022-10-27 444
2045a3b8911b6e Feiyang Chen 2022-10-27 445 p = vmemmap_alloc_block_buf(PMD_SIZE, node, altmap);
2045a3b8911b6e Feiyang Chen 2022-10-27 446 if (p) {
2045a3b8911b6e Feiyang Chen 2022-10-27 447 vmemmap_set_pmd(pmd, p, node, addr, next);
2045a3b8911b6e Feiyang Chen 2022-10-27 448 continue;
2045a3b8911b6e Feiyang Chen 2022-10-27 449 } else if (altmap) {
2045a3b8911b6e Feiyang Chen 2022-10-27 450 /*
2045a3b8911b6e Feiyang Chen 2022-10-27 451 * No fallback: In any case we care about, the
2045a3b8911b6e Feiyang Chen 2022-10-27 452 * altmap should be reasonably sized and aligned
2045a3b8911b6e Feiyang Chen 2022-10-27 453 * such that vmemmap_alloc_block_buf() will always
2045a3b8911b6e Feiyang Chen 2022-10-27 454 * succeed. For consistency with the PTE case,
2045a3b8911b6e Feiyang Chen 2022-10-27 455 * return an error here as failure could indicate
2045a3b8911b6e Feiyang Chen 2022-10-27 456 * a configuration issue with the size of the altmap.
2045a3b8911b6e Feiyang Chen 2022-10-27 457 */
2045a3b8911b6e Feiyang Chen 2022-10-27 458 return -ENOMEM;
2045a3b8911b6e Feiyang Chen 2022-10-27 459 }
2045a3b8911b6e Feiyang Chen 2022-10-27 460 } else if (vmemmap_check_pmd(pmd, node, addr, next))
2045a3b8911b6e Feiyang Chen 2022-10-27 461 continue;
2045a3b8911b6e Feiyang Chen 2022-10-27 462 if (vmemmap_populate_basepages(addr, next, node, altmap))
2045a3b8911b6e Feiyang Chen 2022-10-27 463 return -ENOMEM;
2045a3b8911b6e Feiyang Chen 2022-10-27 464 }
2045a3b8911b6e Feiyang Chen 2022-10-27 465 return 0;
2045a3b8911b6e Feiyang Chen 2022-10-27 466 }
2045a3b8911b6e Feiyang Chen 2022-10-27 467
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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