[kbuild-all] [tip:tmp.tmp2 291/364] fs/ext2/xattr_trusted.c:15:9: error: implicit declaration of function 'capable'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: 6601f8679da18dd112f11e39486b163d4ad976e2 [291/364] sched/headers, fs: Simplify <linux/fs.h> header dependencies config: x86_64-rhel-8.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=66... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout 6601f8679da18dd112f11e39486b163d4ad976e2 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/xarray.h:16, from include/linux/fs.h:12, from fs/ext2/ext2.h:14, from fs/ext2/xattr_trusted.c:9: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ fs/ext2/xattr_trusted.c: In function 'ext2_xattr_trusted_list': 15 | return capable(CAP_SYS_ADMIN); | ^~~~~~~ 15 | return capable(CAP_SYS_ADMIN); | ^~~~~~~~~~~~~ fs/ext2/xattr_trusted.c:15:17: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/uaccess.h:11, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from fs/ext2/ext2.h:19, from fs/ext2/xattr_trusted.c:9: fs/ext2/xattr_trusted.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ fs/ext2/xattr_trusted.c: In function 'ext2_xattr_trusted_list': fs/ext2/xattr_trusted.c:16:1: error: control reaches end of non-void function [-Werror=return-type] 16 | } | ^ cc1: some warnings being treated as errors -- In file included from include/linux/workqueue.h:16, from include/linux/srcu_types.h:20, from include/linux/srcu.h:19, from include/linux/notifier.h:16, from arch/x86/include/asm/uprobes.h:13, from include/linux/uprobes.h:49, from include/linux/mm_types.h:14, from include/linux/mmzone.h:21, from include/linux/gfp.h:8, from include/linux/idr.h:16, from include/linux/kernfs.h:13, from include/linux/kobject.h:20, from include/linux/of.h:18, from include/linux/irqdomain.h:35, from include/linux/acpi.h:13, from include/acpi/apei.h:9, from drivers/acpi/apei/erst-dbg.c:17: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ drivers/acpi/apei/erst-dbg.c: In function 'erst_dbg_write': 157 | if (!capable(CAP_SYS_ADMIN)) | ^~~~~~~ 157 | if (!capable(CAP_SYS_ADMIN)) | ^~~~~~~~~~~~~ drivers/acpi/apei/erst-dbg.c:157:15: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/uaccess.h:11, from drivers/acpi/apei/erst-dbg.c:16: drivers/acpi/apei/erst-dbg.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/workqueue.h:16, from include/linux/interrupt.h:15, from drivers/pci/pcie/aer_inject.c:19: include/linux/rcuwait.h: In function 'rcuwait_active': include/linux/rcupdate.h:364:9: error: dereferencing pointer to incomplete type 'struct task_struct' 364 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:474:31: note: in expansion of macro '__rcu_access_pointer' 474 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ drivers/pci/pcie/aer_inject.c: In function 'aer_inject_write': 492 | if (!capable(CAP_SYS_ADMIN)) | ^~~~~~~ 492 | if (!capable(CAP_SYS_ADMIN)) | ^~~~~~~~~~~~~ drivers/pci/pcie/aer_inject.c:492:15: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/uaccess.h:11, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from include/linux/scatterlist.h:8, from include/linux/dmapool.h:14, from include/linux/pci.h:1463, from drivers/pci/pcie/aer_inject.c:21: drivers/pci/pcie/aer_inject.c: At top level: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/capable +15 fs/ext2/xattr_trusted.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 11 764a5c6b1fa430 Andreas Gruenbacher 2015-12-02 12 static bool 764a5c6b1fa430 Andreas Gruenbacher 2015-12-02 13 ext2_xattr_trusted_list(struct dentry *dentry) ^1da177e4c3f41 Linus Torvalds 2005-04-16 14 { 764a5c6b1fa430 Andreas Gruenbacher 2015-12-02 @15 return capable(CAP_SYS_ADMIN); ^1da177e4c3f41 Linus Torvalds 2005-04-16 16 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 17 :::::: The code at line 15 was first introduced by commit :::::: 764a5c6b1fa4306dd7573c1d80914254909cd036 xattr handlers: Simplify list operation :::::: TO: Andreas Gruenbacher <agruenba(a)redhat.com&gt; :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org