tree: https://github.com/hnaz/linux-mm master head: 7ffdd789c7f570af323ad890ab09118af2e3b0d9 commit: 9939c9934d2e30d1a3b3f7d85572ce3d5f2b0c90 [82/248] mm: remove unneeded includes of <asm/pgalloc.h> config: powerpc-randconfig-r032-20200708 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9939c9934d2e30d1a3b3f7d85572ce3d5f2b0c90 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/powerpc/mm/nohash/tlb.c:409:6: warning: no previous prototype for 'tlb_flush_pgtable' [-Wmissing-prototypes] 409 | void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address) | ^~~~~~~~~~~~~~~~~ vim +/tlb_flush_pgtable +409 arch/powerpc/mm/nohash/tlb.c 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 404 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 405 /* 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 406 * Handling of virtual linear page tables or indirect TLB entries 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 407 * flushing when PTE pages are freed 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 408 */ 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 @409 void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address) 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 410 { 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 411 int tsize = mmu_psize_defs[mmu_pte_psize].enc; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 412 28efc35fe68dac arch/powerpc/mm/tlb_nohash.c Scott Wood 2013-10-11 413 if (book3e_htw_mode != PPC_HTW_NONE) { 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 414 unsigned long start = address & PMD_MASK; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 415 unsigned long end = address + PMD_SIZE; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 416 unsigned long size = 1UL << mmu_psize_defs[mmu_pte_psize].shift; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 417 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 418 /* This isn't the most optimal, ideally we would factor out the 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 419 * while preempt & CPU mask mucking around, or even the IPI but 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 420 * it will do for now 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 421 */ 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 422 while (start < end) { 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 423 __flush_tlb_page(tlb->mm, start, tsize, 1); 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 424 start += size; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 425 } 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 426 } else { 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 427 unsigned long rmask = 0xf000000000000000ul; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 428 unsigned long rid = (address & rmask) | 0x1000000000000000ul; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 429 unsigned long vpte = address & ~rmask; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 430 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 431 vpte = (vpte >> (PAGE_SHIFT - 3)) & ~0xffful; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 432 vpte |= rid; 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 433 __flush_tlb_page(tlb->mm, vpte, tsize, 0); 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 434 } 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 435 } 25d21ad6e799cc arch/powerpc/mm/tlb_nohash.c Benjamin Herrenschmidt 2009-07-23 436 :::::: The code at line 409 was first introduced by commit :::::: 25d21ad6e799cccd097b9df2a2fefe19a7e1dfcf powerpc: Add TLB management code for 64-bit Book3E :::::: TO: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> :::::: CC: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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