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Howlett" , Suren Baghdasaryan , Arnd Bergmann , Shakeel Butt , linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Minchan Kim Subject: Re: [PATCH 1/2] mm/madvise: introduce PR_MADV_SELF flag to process_madvise() Message-ID: <202409240527.pAgR35QJ-lkp@intel.com> References: <077be0d59cb1047870a84c87c62e7b027af1c75d.1727106751.git.lorenzo.stoakes@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <077be0d59cb1047870a84c87c62e7b027af1c75d.1727106751.git.lorenzo.stoakes@oracle.com> X-Stat-Signature: 7nep49dddauk5ybnuxbcz5k4cnxfmoob X-Rspamd-Queue-Id: A0B6B20004 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1727126448-521075 X-HE-Meta: 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 mKdAJdwm 5uhwnyKRgjhcq9srlflgyZsdXfnZBtI8LWNTEP63V55g+Z71/uMa3xl0XuL7uk9awp+WL4qaLkrIQ/AelBR4QN/kPXq1nj9w0tMTX/hi2CcqcpaFqJ03tIQ3OVhvCzf5w56ra+tmRE1txBD27jT+UhyifKe99UixhM1LiH2Qs/+3PU1kW+X3fNhJtfHrY8RO9KFesMQwlkyq+yMv2gIY7Gy1D/4RXGSFo+ND9CE9BtsR8gfgdPxSS/OWnvLj4xPWAc3LCg+hNGwYb6Y39pjoOW+AQkKkWFLft7ewKLkOAe+52ea9Uspa6qDC7xV4W3s11gCRl689nqN5+Y6J7lnluvbSKCRJUxZkprfx3bBfU7zbW7RG+mIHK/8pwKnawidkvUP5cNr9gCEGiSXOBMq5DkENKOo7G/jH5ur5b+olrKngkNvU= 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 Lorenzo, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on arnd-asm-generic/master soc/for-next linus/master v6.11 next-20240923] [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/Lorenzo-Stoakes/mm-madvise-introduce-PR_MADV_SELF-flag-to-process_madvise/20240924-000845 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/077be0d59cb1047870a84c87c62e7b027af1c75d.1727106751.git.lorenzo.stoakes%40oracle.com patch subject: [PATCH 1/2] mm/madvise: introduce PR_MADV_SELF flag to process_madvise() config: arm-aspeed_g4_defconfig (https://download.01.org/0day-ci/archive/20240924/202409240527.pAgR35QJ-lkp@intel.com/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 8663a75fa2f31299ab8d1d90288d9df92aadee88) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240924/202409240527.pAgR35QJ-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/202409240527.pAgR35QJ-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from mm/madvise.c:9: In file included from include/linux/mman.h:5: In file included from include/linux/mm.h:2198: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from mm/madvise.c:21: include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 47 | __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages); | ~~~~~~~~~~~ ^ ~~~ include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 49 | NR_ZONE_LRU_BASE + lru, nr_pages); | ~~~~~~~~~~~~~~~~ ^ ~~~ >> mm/madvise.c:1542:6: warning: variable 'mm' is uninitialized when used here [-Wuninitialized] 1542 | if (mm != current->mm && !process_madvise_remote_valid(behavior)) { | ^~ mm/madvise.c:1511:22: note: initialize the variable 'mm' to silence this warning 1511 | struct mm_struct *mm; | ^ | = NULL 4 warnings generated. vim +/mm +1542 mm/madvise.c 1502 1503 SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec, 1504 size_t, vlen, int, behavior, unsigned int, flags) 1505 { 1506 ssize_t ret; 1507 struct iovec iovstack[UIO_FASTIOV]; 1508 struct iovec *iov = iovstack; 1509 struct iov_iter iter; 1510 struct task_struct *task; 1511 struct mm_struct *mm; 1512 unsigned int f_flags; 1513 1514 if (flags & ~PR_MADV_SELF) { 1515 ret = -EINVAL; 1516 goto out; 1517 } 1518 1519 ret = import_iovec(ITER_DEST, vec, vlen, ARRAY_SIZE(iovstack), &iov, &iter); 1520 if (ret < 0) 1521 goto out; 1522 1523 /* 1524 * Perform an madvise operation on the current process. No restrictions 1525 * need be applied, nor do we need to pin the task or mm_struct. 1526 */ 1527 if (flags & PR_MADV_SELF) { 1528 ret = vector_madvise(current->mm, &iter, behavior); 1529 goto free_iov; 1530 } 1531 1532 task = pidfd_get_task(pidfd, &f_flags); 1533 if (IS_ERR(task)) { 1534 ret = PTR_ERR(task); 1535 goto free_iov; 1536 } 1537 1538 /* 1539 * We need only perform this check if we are attempting to manipulate a 1540 * remote process's address space. 1541 */ > 1542 if (mm != current->mm && !process_madvise_remote_valid(behavior)) { -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki