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Date: Sat, 11 Jun 2022 11:18:36 +0800 From: kernel test robot <lkp@...el.com> To: David Howells <dhowells@...hat.com> Cc: kbuild-all@...ts.01.org, GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>, linux-kernel@...r.kernel.org Subject: [ammarfaizi2-block:dhowells/linux-fs/netfs-linked-list 29/57] include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-linked-list head: c19d336b7f0c53bd31e73f6d7d6c1524f0df55b8 commit: f951c9604853872cf088bb3dbf7d49e3f96b090d [29/57] mm: Make some folio function arguments const config: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20220611/202206111120.hjvhr7ho-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/ammarfaizi2/linux-block/commit/f951c9604853872cf088bb3dbf7d49e3f96b090d git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-linked-list git checkout f951c9604853872cf088bb3dbf7d49e3f96b090d # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 prepare If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@...el.com> All warnings (new ones prefixed by >>): In file included from include/linux/gfp.h:5, from include/linux/slab.h:15, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:9: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ -- In file included from include/linux/percpu.h:5, from include/linux/hrtimer.h:19, from include/linux/sched.h:19, from include/linux/ptrace.h:6, from lib/syscall.c:2: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ In file included from include/linux/string.h:253, from arch/x86/include/asm/page_32.h:22, from arch/x86/include/asm/page.h:14, from arch/x86/include/asm/thread_info.h:12, from include/linux/thread_info.h:60, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/rcupdate.h:27, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from lib/syscall.c:2: In function 'fortify_memcpy_chk', inlined from 'syscall_get_arguments' at arch/x86/include/asm/syscall.h:87:2, inlined from 'collect_syscall' at lib/syscall.c:31:3: include/linux/fortify-string.h:352:25: warning: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning] 352 | __read_overflow2_field(q_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/gfp.h:5, from include/linux/xarray.h:15, from include/linux/list_lru.h:14, from include/linux/fs.h:13, from include/linux/decompress/mm.h:80, from lib/decompress_inflate.c:32: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ lib/decompress_inflate.c: At top level: lib/decompress_inflate.c:42:17: warning: no previous prototype for '__gunzip' [-Wmissing-prototypes] 42 | STATIC int INIT __gunzip(unsigned char *buf, long len, | ^~~~~~~~ -- In file included from include/linux/gfp.h:5, from include/linux/xarray.h:15, from include/linux/list_lru.h:14, from include/linux/fs.h:13, from include/linux/decompress/mm.h:80, from lib/decompress_unxz.c:107: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ lib/decompress_unxz.c: At top level: lib/decompress_unxz.c:251:17: warning: no previous prototype for 'unxz' [-Wmissing-prototypes] 251 | STATIC int INIT unxz(unsigned char *in, long in_size, | ^~~~ -- In file included from include/linux/percpu.h:5, from include/linux/hrtimer.h:19, from include/linux/sched.h:19, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/node.h:18, from include/linux/cpu.h:17, from lib/radix-tree.c:15: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ lib/radix-tree.c: At top level: lib/radix-tree.c:288:6: warning: no previous prototype for 'radix_tree_node_rcu_free' [-Wmissing-prototypes] 288 | void radix_tree_node_rcu_free(struct rcu_head *head) | ^~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/gfp.h:5, from include/linux/radix-tree.h:12, from include/linux/idr.h:15, from include/linux/kernfs.h:12, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/of.h:17, from include/linux/clk-provider.h:9, from lib/vsprintf.c:23: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ lib/vsprintf.c: In function 'va_format': lib/vsprintf.c:1681:9: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1681 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); | ^~~ -- In file included from include/linux/gfp.h:5, from include/linux/radix-tree.h:12, from include/linux/idr.h:15, from include/linux/kernfs.h:12, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/of.h:17, from include/linux/irqdomain.h:35, from include/linux/acpi.h:13, from drivers/i2c/busses/i2c-cros-ec-tunnel.c:6: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ At top level: drivers/i2c/busses/i2c-cros-ec-tunnel.c:295:34: warning: 'cros_ec_i2c_of_match' defined but not used [-Wunused-const-variable=] 295 | static const struct of_device_id cros_ec_i2c_of_match[] = { | ^~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/gfp.h:5, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:17, from lib/lz4/lz4_decompress.c:39: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ lib/lz4/lz4_decompress.c: At top level: lib/lz4/lz4_decompress.c:510:5: warning: no previous prototype for 'LZ4_decompress_safe_forceExtDict' [-Wmissing-prototypes] 510 | int LZ4_decompress_safe_forceExtDict(const char *source, char *dest, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/gfp.h:5, from include/linux/slab.h:15, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:9: include/linux/page-flags.h: In function 'PageHead': >> include/linux/page-flags.h:788:27: warning: passing argument 1 of 'dump_page' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 788 | PF_POISONED_CHECK(page); | ^~~~ include/linux/mmdebug.h:21:35: note: in definition of macro 'VM_BUG_ON_PAGE' 21 | dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\ | ^~~~ include/linux/page-flags.h:370:17: note: in expansion of macro 'VM_BUG_ON_PGFLAGS' 370 | VM_BUG_ON_PGFLAGS(PagePoisoned(page), page); \ | ^~~~~~~~~~~~~~~~~ include/linux/page-flags.h:788:9: note: in expansion of macro 'PF_POISONED_CHECK' 788 | PF_POISONED_CHECK(page); | ^~~~~~~~~~~~~~~~~ include/linux/mmdebug.h:12:29: note: expected 'struct page *' but argument is of type 'const struct page *' 12 | void dump_page(struct page *page, const char *reason); | ~~~~~~~~~~~~~^~~~ vim +788 include/linux/page-flags.h e7d324850bfcb3 Muchun Song 2022-03-22 785 f951c960485387 David Howells 2022-06-08 786 static __always_inline int PageHead(const struct page *page) e7d324850bfcb3 Muchun Song 2022-03-22 787 { e7d324850bfcb3 Muchun Song 2022-03-22 @788 PF_POISONED_CHECK(page); e7d324850bfcb3 Muchun Song 2022-03-22 789 return test_bit(PG_head, &page->flags) && !page_is_fake_head(page); e7d324850bfcb3 Muchun Song 2022-03-22 790 } e7d324850bfcb3 Muchun Song 2022-03-22 791 :::::: The code at line 788 was first introduced by commit :::::: e7d324850bfcb30df563d144c0363cc44595277d mm: hugetlb: free the 2nd vmemmap page associated with each HugeTLB page :::::: TO: Muchun Song <songmuchun@...edance.com> :::::: CC: Linus Torvalds <torvalds@...ux-foundation.org> -- 0-DAY CI Kernel Test Service https://01.org/lkp
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