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Rao" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Gerald Schaefer , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andy Lutomirski , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 4/5] mm: ptdump: Have ptdump_check_wx() return bool Message-ID: <202402010618.9izDkpGF-lkp@intel.com> References: <7943149fe955458cb7b57cd483bf41a3aad94684.1706610398.git.christophe.leroy@csgroup.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7943149fe955458cb7b57cd483bf41a3aad94684.1706610398.git.christophe.leroy@csgroup.eu> X-Stat-Signature: d4rkz9bqcejm6b9n476bm3zachixzwmu X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 935FC180015 X-Rspam-User: X-HE-Tag: 1706740724-891884 X-HE-Meta: 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 OEum+oaV 48wKOeJ2mlR7NLg4MhnGdT4pGvKPZxvUQeCaw2R6vgzdncC01JcBtKkzI0miGUKdyrvmeQNo056fk6wbFqtrnDkeD7JqqoNbQ7ymJX4DCcsrA7RZbP9yHg0v7zKoP7RNiN+yb9WFmAqDpAStxcF+YQn+HR6rlmOZrPCJ6by5JOmABpgLPuVknbmMYTatj8KbsMPhs40IhobMT+Q0ZeZIOxSrPHcp23L+rTjklXImz4WBpesIvC92tI+him0XZSKrQ5J+Mq9Wy2slbdOS0n5XxFyOCJijNPEIVza9Bo9FX2QGfKN7+txQdT2UJ21EjYfrJQGaRJKCsayVU6rylJ0BMaYVV8OXaouJR84O1Uf66rsWgKuk0jXa/CbseKDMfXhoanMjZ9bCnD35Hh3FYgYWr/OaLvF1IFUVCwirY X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Christophe, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Christophe-Leroy/arm-ptdump-Rename-CONFIG_DEBUG_WX-to-CONFIG_ARM_DEBUG_WX/20240130-183913 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/7943149fe955458cb7b57cd483bf41a3aad94684.1706610398.git.christophe.leroy%40csgroup.eu patch subject: [PATCH v2 4/5] mm: ptdump: Have ptdump_check_wx() return bool config: i386-randconfig-141-20240131 (https://download.01.org/0day-ci/archive/20240201/202402010618.9izDkpGF-lkp@intel.com/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240201/202402010618.9izDkpGF-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202402010618.9izDkpGF-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/x86/mm/dump_pagetables.c:365:6: error: cannot combine with previous 'type-name' declaration specifier 365 | bool void ptdump_walk_pgd_level_core(struct seq_file *m, | ^ >> arch/x86/mm/dump_pagetables.c:365:11: warning: no previous prototype for function 'ptdump_walk_pgd_level_core' [-Wmissing-prototypes] 365 | bool void ptdump_walk_pgd_level_core(struct seq_file *m, | ^ arch/x86/mm/dump_pagetables.c:365:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 365 | bool void ptdump_walk_pgd_level_core(struct seq_file *m, | ^ | static 1 warning and 1 error generated. vim +/ptdump_walk_pgd_level_core +365 arch/x86/mm/dump_pagetables.c 364 > 365 bool void ptdump_walk_pgd_level_core(struct seq_file *m, 366 struct mm_struct *mm, pgd_t *pgd, 367 bool checkwx, bool dmesg) 368 { 369 const struct ptdump_range ptdump_ranges[] = { 370 #ifdef CONFIG_X86_64 371 {0, PTRS_PER_PGD * PGD_LEVEL_MULT / 2}, 372 {GUARD_HOLE_END_ADDR, ~0UL}, 373 #else 374 {0, ~0UL}, 375 #endif 376 {0, 0} 377 }; 378 379 struct pg_state st = { 380 .ptdump = { 381 .note_page = note_page, 382 .effective_prot = effective_prot, 383 .range = ptdump_ranges 384 }, 385 .level = -1, 386 .to_dmesg = dmesg, 387 .check_wx = checkwx, 388 .seq = m 389 }; 390 391 ptdump_walk_pgd(&st.ptdump, mm, pgd); 392 393 if (!checkwx) 394 return true; 395 if (st.wx_pages) { 396 pr_info("x86/mm: Checked W+X mappings: FAILED, %lu W+X pages found.\n", 397 st.wx_pages); 398 399 return false; 400 } else { 401 pr_info("x86/mm: Checked W+X mappings: passed, no W+X pages found.\n"); 402 403 return true; 404 } 405 } 406 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki