CC: [email protected] CC: [email protected] TO: Michel Lespinasse <[email protected]> CC: Andrew Morton <[email protected]> CC: Linux Memory Management List <[email protected]> CC: Vlastimil Babka <[email protected]> CC: Davidlohr Bueso <[email protected]> CC: Daniel Jordan <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cd796ed3345030aa1bb332fe5c793b3dddaf56e7 commit: da1c55f1b272f4bd54671d459b39ea7b54944ef9 mmap locking API: rename mmap_sem to mmap_lock date: 6 months ago :::::: branch date: 8 hours ago :::::: commit date: 6 months ago config: powerpc64-randconfig-m031-20201208 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: arch/powerpc/mm/fault.c:644 __do_page_fault() warn: inconsistent returns 'mm->mmap_lock'. vim +644 arch/powerpc/mm/fault.c fe4a6856cb4f43 Aneesh Kumar K.V 2020-05-05 601 bd0d63f8095ae6 Benjamin Herrenschmidt 2017-07-19 602 if (unlikely(access_error(is_write, is_exec, vma))) ecb101aed86156 John Sperbeck 2017-12-31 603 return bad_access(regs, address); 14cf11af6cf608 Paul Mackerras 2005-09-26 604 14cf11af6cf608 Paul Mackerras 2005-09-26 605 /* 14cf11af6cf608 Paul Mackerras 2005-09-26 606 * If for any reason at all we couldn't handle the fault, 14cf11af6cf608 Paul Mackerras 2005-09-26 607 * make sure we exit gracefully rather than endlessly redo 14cf11af6cf608 Paul Mackerras 2005-09-26 608 * the fault. 14cf11af6cf608 Paul Mackerras 2005-09-26 609 */ dcddffd41d3f1d Kirill A. Shutemov 2016-07-26 610 fault = handle_mm_fault(vma, address, flags); e6c2a4797e101a Ram Pai 2018-01-18 611 f43bb27ebf27ee Benjamin Herrenschmidt 2017-07-19 612 major |= fault & VM_FAULT_MAJOR; 14c02e419a395c Laurent Dufour 2017-02-14 613 c9a0dad1620141 Peter Xu 2020-04-01 614 if (fault_signal_pending(fault, regs)) c9a0dad1620141 Peter Xu 2020-04-01 615 return user_mode(regs) ? 0 : SIGBUS; c9a0dad1620141 Peter Xu 2020-04-01 616 14c02e419a395c Laurent Dufour 2017-02-14 617 /* 14c02e419a395c Laurent Dufour 2017-02-14 618 * Handle the retry right now, the mmap_sem has been released in that 14c02e419a395c Laurent Dufour 2017-02-14 619 * case. 14c02e419a395c Laurent Dufour 2017-02-14 620 */ 14c02e419a395c Laurent Dufour 2017-02-14 621 if (unlikely(fault & VM_FAULT_RETRY)) { 14c02e419a395c Laurent Dufour 2017-02-14 622 if (flags & FAULT_FLAG_ALLOW_RETRY) { 14c02e419a395c Laurent Dufour 2017-02-14 623 flags |= FAULT_FLAG_TRIED; 14c02e419a395c Laurent Dufour 2017-02-14 624 goto retry; 14c02e419a395c Laurent Dufour 2017-02-14 625 } 14cf11af6cf608 Paul Mackerras 2005-09-26 626 } 9be72573a80648 Benjamin Herrenschmidt 2012-03-01 627 d8ed45c5dcd455 Michel Lespinasse 2020-06-08 628 mmap_read_unlock(current->mm); b5c8f0fd595d25 Benjamin Herrenschmidt 2017-07-19 629 b5c8f0fd595d25 Benjamin Herrenschmidt 2017-07-19 630 if (unlikely(fault & VM_FAULT_ERROR)) b5c8f0fd595d25 Benjamin Herrenschmidt 2017-07-19 631 return mm_fault_error(regs, address, fault); b5c8f0fd595d25 Benjamin Herrenschmidt 2017-07-19 632 9be72573a80648 Benjamin Herrenschmidt 2012-03-01 633 /* 14c02e419a395c Laurent Dufour 2017-02-14 634 * Major/minor page fault accounting. 9be72573a80648 Benjamin Herrenschmidt 2012-03-01 635 */ f43bb27ebf27ee Benjamin Herrenschmidt 2017-07-19 636 if (major) { 83c54070ee1a2d Nick Piggin 2007-07-19 637 current->maj_flt++; 04aafdc6018fee Benjamin Herrenschmidt 2017-07-19 638 perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address); 3da026480a7536 Benjamin Herrenschmidt 2017-07-19 639 cmo_account_page_fault(); ac17dc8e58f306 Peter Zijlstra 2009-03-13 640 } else { 83c54070ee1a2d Nick Piggin 2007-07-19 641 current->min_flt++; 04aafdc6018fee Benjamin Herrenschmidt 2017-07-19 642 perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address); ac17dc8e58f306 Peter Zijlstra 2009-03-13 643 } 65d47fd4a37cbd Benjamin Herrenschmidt 2017-07-19 @644 return 0; 14cf11af6cf608 Paul Mackerras 2005-09-26 645 } 7afad422ac6106 Benjamin Herrenschmidt 2017-07-19 646 NOKPROBE_SYMBOL(__do_page_fault); 7afad422ac6106 Benjamin Herrenschmidt 2017-07-19 647 :::::: The code at line 644 was first introduced by commit :::::: 65d47fd4a37cbd60d0737cdae09edf1d208364d7 powerpc/mm: Simplify returns from __do_page_fault :::::: TO: Benjamin Herrenschmidt <[email protected]> :::::: CC: Michael Ellerman <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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