On Tue, May 24, 2016 at 12:44:57PM -0700, Andrew Morton wrote: > On Tue, 24 May 2016 18:48:23 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> wrote: > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > head: 66c198deda3725c57939c6cdaf2c9f5375cd79ad > > commit: 186ba1a848cef542bdf7c881f863783e9e7a91df [11896/11991] mm-check-the-return-value-of-lookup_page_ext-for-all-call-sites-checkpatch-fixes > > config: i386-randconfig-h1-05241552 (attached as .config) > > compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 > > reproduce: > > git checkout 186ba1a848cef542bdf7c881f863783e9e7a91df > > # save the attached .config to linux build tree > > make ARCH=i386 > > > > All warnings (new ones prefixed by >>): > > > > ^~~~~~~~~~~~~~~~~~~~~~~~ > > fs/proc/task_mmu.c:408:30: warning: unused variable 'proc_pid_maps_operations' [-Wunused-variable] > > const struct file_operations proc_pid_maps_operations = { > > ^~~~~~~~~~~~~~~~~~~~~~~ > > Confused. proc_pid_maps_operations is referenced from fs/proc/base.o. > > > In file included from fs/proc/task_mmu.c:22:0: > > fs/proc/internal.h:299:37: warning: unused variable 'proc_pagemap_operations' [-Wunused-variable] > > extern const struct file_operations proc_pagemap_operations; > > ^~~~~~~~~~~~~~~~~~~~~~~ > > Even more confused. Your config has CONFIG_PROC_PAGE_MONITOR=n, so > proc_pagemap_operations doesn't get past the cpp stage. They are confusing indeed. > > In file included from fs/proc/task_mmu.c:16:0: > > >> include/linux/page_idle.h:49:19: warning: unused variable 'page_ext' [-Wunused-variable] > > struct page_ext *page_ext = lookup_page_ext(page); > > This is the new one and is presumably caused by the great stream of > missing ')'s in the CONFIG_64BIT=n section of page_idle.h. That triggered so many noises (pasted below), it may be easier to look closer at the error/warnings after fixing that issue. - if (unlikely(!page_ext) + if (unlikely(!page_ext)) All the error/warnings magically disappears after adding the missing ')'s! Thanks, Fengguang --- make ARCH=i386 M=fs/proc/ grep -a -F fs/proc/ /tmp/build-err-186ba1a848cef542bdf7c881f863783e9e7a91df-wfg --color warning: (VIDEO_EM28XX_V4L2) selects VIDEO_MT9V011 which has unmet direct dependencies (MEDIA_SUPPORT && I2C && VIDEO_V4L2 && MEDIA_CAMERA_SUPPORT) warning: (VIDEO_EM28XX_V4L2) selects VIDEO_MT9V011 which has unmet direct dependencies (MEDIA_SUPPORT && I2C && VIDEO_V4L2 && MEDIA_CAMERA_SUPPORT) In file included from ../fs/proc/task_mmu.c:16:0: ../include/linux/page_idle.h: In function 'page_is_young': ../include/linux/page_idle.h:139:0: error: unterminated argument list invoking macro "if" -- In file included from ../include/linux/shmem_fs.h:4:0, from ../fs/proc/task_mmu.c:17: ../include/linux/file.h:12:1: error: expected '(' before 'struct' struct file; -- ^~~~~~~~~ In file included from ../include/linux/shmem_fs.h:9:0, from ../fs/proc/task_mmu.c:17: ../include/linux/xattr.h:62:27: error: invalid storage class for function 'xattr_prefix' static inline const char *xattr_prefix(const struct xattr_handler *handler) -- static inline void simple_xattrs_free(struct simple_xattrs *xattrs) ^~~~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:17:0: ../include/linux/shmem_fs.h:22:16: error: field 'vfs_inode' has incomplete type struct inode vfs_inode; -- from ../include/linux/mmdebug.h:4, from ../include/linux/mm.h:8, from ../fs/proc/task_mmu.c:1: ../include/linux/shmem_fs.h: In function 'SHMEM_I': ../include/linux/kernel.h:831:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] -- return container_of(inode, struct shmem_inode_info, vfs_inode); ^~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:17:0: ../include/linux/shmem_fs.h: In function 'page_is_young': ../include/linux/shmem_fs.h:64:28: error: invalid storage class for function 'shmem_read_mapping_page' -- ^~~~~~~~~~~~~~~~~~~~~~~ In file included from ../arch/x86/include/asm/elf.h:94:0, from ../fs/proc/task_mmu.c:19: ../arch/x86/include/asm/desc.h:11:20: error: invalid storage class for function 'fill_ldt' static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *info) -- from ../include/linux/gfp.h:5, from ../include/linux/mm.h:9, from ../fs/proc/task_mmu.c:1: ../include/linux/percpu-defs.h:86:33: error: section attribute cannot be specified for local variables extern __PCPU_DUMMY_ATTRS char __pcpu_scope_##name; \ -- ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../arch/x86/include/asm/elf.h:94:0, from ../fs/proc/task_mmu.c:19: ../arch/x86/include/asm/desc.h:48:35: error: invalid storage class for function 'get_cpu_gdt_table' static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) -- static inline void load_current_idt(void) ^~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:19:0: ../arch/x86/include/asm/elf.h:345:19: error: invalid storage class for function 'mmap_is_ia32' static inline int mmap_is_ia32(void) ^~~~~~~~~~~~ In file included from ../fs/proc/internal.h:12:0, from ../fs/proc/task_mmu.c:22: ../include/linux/proc_fs.h:30:38: error: invalid storage class for function 'proc_create' static inline struct proc_dir_entry *proc_create( -- static inline struct proc_dir_entry *proc_net_mkdir( ^~~~~~~~~~~~~~ In file included from ../fs/proc/internal.h:13:0, from ../fs/proc/task_mmu.c:22: ../include/linux/proc_ns.h:64:19: error: invalid storage class for function 'ns_alloc_inum' static inline int ns_alloc_inum(struct ns_common *ns) ^~~~~~~~~~~~~ In file included from ../fs/proc/internal.h:16:0, from ../fs/proc/task_mmu.c:22: ../include/linux/binfmts.h:86:20: error: invalid storage class for function 'register_binfmt' static inline void register_binfmt(struct linux_binfmt *fmt) -- static inline void insert_binfmt(struct linux_binfmt *fmt) ^~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:69:15: error: field 'vfs_inode' has incomplete type struct inode vfs_inode; ^~~~~~~~~ ../fs/proc/internal.h:75:34: error: invalid storage class for function 'PROC_I' static inline struct proc_inode *PROC_I(const struct inode *inode) ^~~~~~ -- from ../include/linux/mmdebug.h:4, from ../include/linux/mm.h:8, from ../fs/proc/task_mmu.c:1: ../fs/proc/internal.h: In function 'PROC_I': ../include/linux/kernel.h:831:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] const typeof( ((type *)0)->member ) *__mptr = (ptr); \ ^ ../fs/proc/internal.h:77:9: note: in expansion of macro 'container_of' return container_of(inode, struct proc_inode, vfs_inode); ^~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h: In function 'page_is_young': ../fs/proc/internal.h:80:38: error: invalid storage class for function 'PDE' static inline struct proc_dir_entry *PDE(const struct inode *inode) ^~~ ../fs/proc/internal.h:85:21: error: invalid storage class for function '__PDE_DATA' static inline void *__PDE_DATA(const struct inode *inode) ^~~~~~~~~~ ../fs/proc/internal.h:90:27: error: invalid storage class for function 'proc_pid' static inline struct pid *proc_pid(struct inode *inode) ^~~~~~~~ ../fs/proc/internal.h:95:35: error: invalid storage class for function 'get_proc_task' static inline struct task_struct *get_proc_task(struct inode *inode) ^~~~~~~~~~~~~ ../fs/proc/internal.h: In function 'get_proc_task': ../fs/proc/internal.h:97:9: error: return from incompatible pointer type [-Werror=incompatible-pointer-types] return get_pid_task(proc_pid(inode), PIDTYPE_PID); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h: In function 'page_is_young': ../fs/proc/internal.h:100:19: error: invalid storage class for function 'task_dumpable' static inline int task_dumpable(struct task_struct *task) ^~~~~~~~~~~~~ ../fs/proc/internal.h: In function 'task_dumpable': ../fs/proc/internal.h:105:12: error: passing argument 1 of 'task_lock' from incompatible pointer type [-Werror=incompatible-pointer-types] task_lock(task); ^~~~ In file included from ../include/linux/vmacache.h:4:0, from ../fs/proc/task_mmu.c:2: ../include/linux/sched.h:2912:20: note: expected 'struct task_struct *' but argument is of type 'struct task_struct *' static inline void task_lock(struct task_struct *p) ^~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:106:11: error: dereferencing pointer to incomplete type 'struct task_struct' mm = task->mm; ^~ ../fs/proc/internal.h:109:14: error: passing argument 1 of 'task_unlock' from incompatible pointer type [-Werror=incompatible-pointer-types] task_unlock(task); ^~~~ In file included from ../include/linux/vmacache.h:4:0, from ../fs/proc/task_mmu.c:2: ../include/linux/sched.h:2917:20: note: expected 'struct task_struct *' but argument is of type 'struct task_struct *' static inline void task_unlock(struct task_struct *p) ^~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h: In function 'page_is_young': ../fs/proc/internal.h:115:24: error: invalid storage class for function 'name_to_int' static inline unsigned name_to_int(const struct qstr *qstr) ^~~~~~~~~~~ ../fs/proc/internal.h:187:38: error: invalid storage class for function 'pde_get' static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) ^~~~~~~ ../fs/proc/internal.h:194:20: error: invalid storage class for function 'is_empty_pde' static inline bool is_empty_pde(const struct proc_dir_entry *pde) ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:24:6: error: static declaration of 'task_mem' follows non-static declaration void task_mem(struct seq_file *m, struct mm_struct *mm) ^~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:305:13: note: previous declaration of 'task_mem' was here extern void task_mem(struct seq_file *, struct mm_struct *); ^~~~~~~~ ../fs/proc/task_mmu.c:86:15: error: static declaration of 'task_vsize' follows non-static declaration unsigned long task_vsize(struct mm_struct *mm) ^~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:301:22: note: previous declaration of 'task_vsize' was here extern unsigned long task_vsize(struct mm_struct *); ^~~~~~~~~~ ../fs/proc/task_mmu.c:91:15: error: static declaration of 'task_statm' follows non-static declaration unsigned long task_statm(struct mm_struct *mm, ^~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:302:22: note: previous declaration of 'task_statm' was here extern unsigned long task_statm(struct mm_struct *, ^~~~~~~~~~ ../fs/proc/task_mmu.c:122:13: error: invalid storage class for function 'hold_task_mempolicy' static void hold_task_mempolicy(struct proc_maps_private *priv) ^~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:125:13: error: invalid storage class for function 'release_task_mempolicy' static void release_task_mempolicy(struct proc_maps_private *priv) ^~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:130:13: error: invalid storage class for function 'vma_stop' static void vma_stop(struct proc_maps_private *priv) ^~~~~~~~ ../fs/proc/task_mmu.c:140:1: error: invalid storage class for function 'm_next_vma' m_next_vma(struct proc_maps_private *priv, struct vm_area_struct *vma) ^~~~~~~~~~ ../fs/proc/task_mmu.c:147:13: error: invalid storage class for function 'm_cache_vma' static void m_cache_vma(struct seq_file *m, struct vm_area_struct *vma) ^~~~~~~~~~~ ../fs/proc/task_mmu.c:153:14: error: invalid storage class for function 'm_start' static void *m_start(struct seq_file *m, loff_t *ppos) ^~~~~~~ ../fs/proc/task_mmu.c:200:14: error: invalid storage class for function 'm_next' static void *m_next(struct seq_file *m, void *v, loff_t *pos) ^~~~~~ ../fs/proc/task_mmu.c:212:13: error: invalid storage class for function 'm_stop' static void m_stop(struct seq_file *m, void *v) ^~~~~~ ../fs/proc/task_mmu.c: In function 'm_stop': ../fs/proc/task_mmu.c:219:19: error: passing argument 1 of 'put_task_struct' from incompatible pointer type [-Werror=incompatible-pointer-types] put_task_struct(priv->task); ^~~~ In file included from ../include/linux/vmacache.h:4:0, from ../fs/proc/task_mmu.c:2: ../include/linux/sched.h:2135:20: note: expected 'struct task_struct *' but argument is of type 'struct task_struct *' static inline void put_task_struct(struct task_struct *t) ^~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'page_is_young': ../fs/proc/task_mmu.c:224:12: error: invalid storage class for function 'proc_maps_open' static int proc_maps_open(struct inode *inode, struct file *file, ^~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'proc_maps_open': ../fs/proc/task_mmu.c:237:23: error: passing argument 1 of 'seq_release_private' from incompatible pointer type [-Werror=incompatible-pointer-types] seq_release_private(inode, file); ^~~~~ In file included from ../include/linux/cgroup.h:17:0, from ../include/linux/hugetlb.h:8, from ../fs/proc/task_mmu.c:3: ../include/linux/seq_file.h:140:5: note: expected 'struct inode *' but argument is of type 'struct inode *' int seq_release_private(struct inode *, struct file *); ^~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'page_is_young': ../fs/proc/task_mmu.c:244:12: error: invalid storage class for function 'proc_map_release' static int proc_map_release(struct inode *inode, struct file *file) ^~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'proc_map_release': ../fs/proc/task_mmu.c:252:29: error: passing argument 1 of 'seq_release_private' from incompatible pointer type [-Werror=incompatible-pointer-types] return seq_release_private(inode, file); ^~~~~ In file included from ../include/linux/cgroup.h:17:0, from ../include/linux/hugetlb.h:8, from ../fs/proc/task_mmu.c:3: ../include/linux/seq_file.h:140:5: note: expected 'struct inode *' but argument is of type 'struct inode *' int seq_release_private(struct inode *, struct file *); ^~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'page_is_young': ../fs/proc/task_mmu.c:255:12: error: invalid storage class for function 'do_maps_open' static int do_maps_open(struct inode *inode, struct file *file, ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:266:12: error: invalid storage class for function 'is_stack' static int is_stack(struct proc_maps_private *priv, ^~~~~~~~ ../fs/proc/task_mmu.c: In function 'is_stack': ../fs/proc/task_mmu.c:279:8: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types] task = pid_task(proc_pid(inode), PIDTYPE_PID); ^ ../fs/proc/task_mmu.c:281:39: error: passing argument 2 of 'vma_is_stack_for_task' from incompatible pointer type [-Werror=incompatible-pointer-types] stack = vma_is_stack_for_task(vma, task); ^~~~ In file included from ../fs/proc/task_mmu.c:1:0: ../include/linux/mm.h:1360:5: note: expected 'struct task_struct *' but argument is of type 'struct task_struct *' int vma_is_stack_for_task(struct vm_area_struct *vma, struct task_struct *t); ^~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'page_is_young': ../fs/proc/task_mmu.c:288:1: error: invalid storage class for function 'show_map_vma' show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) ^~~~~~~~~~~~ ../fs/proc/task_mmu.c: In function 'show_map_vma': ../fs/proc/task_mmu.c:301:25: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] struct inode *inode = file_inode(vma->vm_file); ^~~~~~~~~~ ../fs/proc/task_mmu.c:302:14: error: dereferencing pointer to incomplete type 'struct inode' dev = inode->i_sb->s_dev; ^~ ../fs/proc/task_mmu.c: In function 'page_is_young': ../fs/proc/task_mmu.c:367:12: error: invalid storage class for function 'show_map' static int show_map(struct seq_file *m, void *v, int is_pid) ^~~~~~~~ ../fs/proc/task_mmu.c:374:12: error: invalid storage class for function 'show_pid_map' static int show_pid_map(struct seq_file *m, void *v) ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:379:12: error: invalid storage class for function 'show_tid_map' static int show_tid_map(struct seq_file *m, void *v) ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:385:11: error: initializer element is not constant .start = m_start, ^~~~~~~ ../fs/proc/task_mmu.c:385:11: note: (near initialization for 'proc_pid_maps_op.start') ../fs/proc/task_mmu.c:386:10: error: initializer element is not constant .next = m_next, ^~~~~~ ../fs/proc/task_mmu.c:386:10: note: (near initialization for 'proc_pid_maps_op.next') ../fs/proc/task_mmu.c:387:10: error: initializer element is not constant .stop = m_stop, ^~~~~~ ../fs/proc/task_mmu.c:387:10: note: (near initialization for 'proc_pid_maps_op.stop') ../fs/proc/task_mmu.c:388:10: error: initializer element is not constant .show = show_pid_map ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:388:10: note: (near initialization for 'proc_pid_maps_op.show') ../fs/proc/task_mmu.c:392:11: error: initializer element is not constant .start = m_start, ^~~~~~~ ../fs/proc/task_mmu.c:392:11: note: (near initialization for 'proc_tid_maps_op.start') ../fs/proc/task_mmu.c:393:10: error: initializer element is not constant .next = m_next, ^~~~~~ ../fs/proc/task_mmu.c:393:10: note: (near initialization for 'proc_tid_maps_op.next') ../fs/proc/task_mmu.c:394:10: error: initializer element is not constant .stop = m_stop, ^~~~~~ ../fs/proc/task_mmu.c:394:10: note: (near initialization for 'proc_tid_maps_op.stop') ../fs/proc/task_mmu.c:395:10: error: initializer element is not constant .show = show_tid_map ^~~~~~~~~~~~ ../fs/proc/task_mmu.c:395:10: note: (near initialization for 'proc_tid_maps_op.show') ../fs/proc/task_mmu.c:398:12: error: invalid storage class for function 'pid_maps_open' static int pid_maps_open(struct inode *inode, struct file *file) ^~~~~~~~~~~~~ ../fs/proc/task_mmu.c:403:12: error: invalid storage class for function 'tid_maps_open' static int tid_maps_open(struct inode *inode, struct file *file) ^~~~~~~~~~~~~ ../fs/proc/task_mmu.c:408:14: error: variable 'proc_pid_maps_operations' has initializer but incomplete type const struct file_operations proc_pid_maps_operations = { ^~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:408:30: error: declaration of 'proc_pid_maps_operations' with no linkage follows extern declaration const struct file_operations proc_pid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:292:37: note: previous declaration of 'proc_pid_maps_operations' was here extern const struct file_operations proc_pid_maps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:409:2: error: unknown field 'open' specified in initializer .open = pid_maps_open, ^ ../fs/proc/task_mmu.c:409:11: warning: excess elements in struct initializer .open = pid_maps_open, ^~~~~~~~~~~~~ ../fs/proc/task_mmu.c:409:11: note: (near initialization for 'proc_pid_maps_operations') ../fs/proc/task_mmu.c:410:2: error: unknown field 'read' specified in initializer .read = seq_read, ^ ../fs/proc/task_mmu.c:410:11: warning: excess elements in struct initializer .read = seq_read, ^~~~~~~~ ../fs/proc/task_mmu.c:410:11: note: (near initialization for 'proc_pid_maps_operations') ../fs/proc/task_mmu.c:411:2: error: unknown field 'llseek' specified in initializer .llseek = seq_lseek, ^ ../fs/proc/task_mmu.c:411:13: warning: excess elements in struct initializer .llseek = seq_lseek, ^~~~~~~~~ ../fs/proc/task_mmu.c:411:13: note: (near initialization for 'proc_pid_maps_operations') ../fs/proc/task_mmu.c:412:2: error: unknown field 'release' specified in initializer .release = proc_map_release, ^ ../fs/proc/task_mmu.c:412:13: warning: excess elements in struct initializer .release = proc_map_release, ^~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:412:13: note: (near initialization for 'proc_pid_maps_operations') ../fs/proc/task_mmu.c:408:30: error: storage size of 'proc_pid_maps_operations' isn't known const struct file_operations proc_pid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:415:14: error: variable 'proc_tid_maps_operations' has initializer but incomplete type const struct file_operations proc_tid_maps_operations = { ^~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:415:30: error: declaration of 'proc_tid_maps_operations' with no linkage follows extern declaration const struct file_operations proc_tid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:293:37: note: previous declaration of 'proc_tid_maps_operations' was here extern const struct file_operations proc_tid_maps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:416:2: error: unknown field 'open' specified in initializer .open = tid_maps_open, ^ ../fs/proc/task_mmu.c:416:11: warning: excess elements in struct initializer .open = tid_maps_open, ^~~~~~~~~~~~~ ../fs/proc/task_mmu.c:416:11: note: (near initialization for 'proc_tid_maps_operations') ../fs/proc/task_mmu.c:417:2: error: unknown field 'read' specified in initializer .read = seq_read, ^ ../fs/proc/task_mmu.c:417:11: warning: excess elements in struct initializer .read = seq_read, ^~~~~~~~ ../fs/proc/task_mmu.c:417:11: note: (near initialization for 'proc_tid_maps_operations') ../fs/proc/task_mmu.c:418:2: error: unknown field 'llseek' specified in initializer .llseek = seq_lseek, ^ ../fs/proc/task_mmu.c:418:13: warning: excess elements in struct initializer .llseek = seq_lseek, ^~~~~~~~~ ../fs/proc/task_mmu.c:418:13: note: (near initialization for 'proc_tid_maps_operations') ../fs/proc/task_mmu.c:419:2: error: unknown field 'release' specified in initializer .release = proc_map_release, ^ ../fs/proc/task_mmu.c:419:13: warning: excess elements in struct initializer .release = proc_map_release, ^~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:419:13: note: (near initialization for 'proc_tid_maps_operations') ../fs/proc/task_mmu.c:415:30: error: storage size of 'proc_tid_maps_operations' isn't known const struct file_operations proc_tid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:420:1: error: expected declaration or statement at end of input }; ^ ../fs/proc/task_mmu.c:415:30: warning: unused variable 'proc_tid_maps_operations' [-Wunused-variable] const struct file_operations proc_tid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/task_mmu.c:408:30: warning: unused variable 'proc_pid_maps_operations' [-Wunused-variable] const struct file_operations proc_pid_maps_operations = { ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:22:0: ../fs/proc/internal.h:299:37: warning: unused variable 'proc_pagemap_operations' [-Wunused-variable] extern const struct file_operations proc_pagemap_operations; ^~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:298:37: warning: unused variable 'proc_clear_refs_operations' [-Wunused-variable] extern const struct file_operations proc_clear_refs_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:297:37: warning: unused variable 'proc_tid_smaps_operations' [-Wunused-variable] extern const struct file_operations proc_tid_smaps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:296:37: warning: unused variable 'proc_pid_smaps_operations' [-Wunused-variable] extern const struct file_operations proc_pid_smaps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:295:37: warning: unused variable 'proc_tid_numa_maps_operations' [-Wunused-variable] extern const struct file_operations proc_tid_numa_maps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:294:37: warning: unused variable 'proc_pid_numa_maps_operations' [-Wunused-variable] extern const struct file_operations proc_pid_numa_maps_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:270:30: warning: unused variable 'proc_root' [-Wunused-variable] extern struct proc_dir_entry proc_root; ^~~~~~~~~ ../fs/proc/internal.h:228:38: warning: unused variable 'proc_net_inode_operations' [-Wunused-variable] extern const struct inode_operations proc_net_inode_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:227:37: warning: unused variable 'proc_net_operations' [-Wunused-variable] extern const struct file_operations proc_net_operations; ^~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:222:37: warning: unused variable 'proc_ns_dir_operations' [-Wunused-variable] extern const struct file_operations proc_ns_dir_operations; ^~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:221:38: warning: unused variable 'proc_ns_dir_inode_operations' [-Wunused-variable] extern const struct inode_operations proc_ns_dir_inode_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:211:38: warning: unused variable 'proc_pid_link_inode_operations' [-Wunused-variable] extern const struct inode_operations proc_pid_link_inode_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:209:38: warning: unused variable 'proc_link_inode_operations' [-Wunused-variable] extern const struct inode_operations proc_link_inode_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:162:39: warning: unused variable 'pid_dentry_operations' [-Wunused-variable] extern const struct dentry_operations pid_dentry_operations; ^~~~~~~~~~~~~~~~~~~~~ ../fs/proc/internal.h:148:37: warning: unused variable 'proc_tid_children_operations' [-Wunused-variable] extern const struct file_operations proc_tid_children_operations; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../fs/proc/internal.h:16:0, from ../fs/proc/task_mmu.c:22: ../include/linux/binfmts.h:105:12: warning: unused variable 'suid_dumpable' [-Wunused-variable] extern int suid_dumpable; ^~~~~~~~~~~~~ In file included from ../fs/proc/internal.h:13:0, from ../fs/proc/task_mmu.c:22: ../include/linux/proc_ns.h:29:40: warning: unused variable 'cgroupns_operations' [-Wunused-variable] extern const struct proc_ns_operations cgroupns_operations; -- extern const struct proc_ns_operations netns_operations; ^~~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:19:0: ../arch/x86/include/asm/elf.h:364:28: warning: unused variable 'va_align' [-Wunused-variable] extern struct va_alignment va_align; ^~~~~~~~ In file included from ../arch/x86/include/asm/elf.h:94:0, from ../fs/proc/task_mmu.c:19: ../arch/x86/include/asm/desc.h:40:18: warning: unused variable 'debug_idt_table' [-Wunused-variable] extern gate_desc debug_idt_table[]; -- extern struct desc_ptr debug_idt_descr; ^~~~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:19:0: ../arch/x86/include/asm/elf.h:82:21: warning: unused variable 'vdso32_enabled' [-Wunused-variable] extern unsigned int vdso32_enabled; ^~~~~~~~~~~~~~ In file included from ../arch/x86/include/asm/elf.h:76:0, from ../fs/proc/task_mmu.c:19: ../arch/x86/include/asm/vdso.h:39:32: warning: unused variable 'vdso_image_32' [-Wunused-variable] extern const struct vdso_image vdso_image_32; ^~~~~~~~~~~~~ In file included from ../fs/proc/task_mmu.c:16:0: ../include/linux/page_idle.h:49:19: warning: unused variable 'page_ext' [-Wunused-variable] struct page_ext *page_ext = lookup_page_ext(page); ^~~~~~~~ ../fs/proc/task_mmu.c:420:1: warning: no return statement in function returning non-void [-Wreturn-type] }; ^ At top level: ../fs/proc/task_mmu.c:91:15: warning: 'task_statm' defined but not used [-Wunused-function] unsigned long task_statm(struct mm_struct *mm, ^~~~~~~~~~ ../fs/proc/task_mmu.c:86:15: warning: 'task_vsize' defined but not used [-Wunused-function] unsigned long task_vsize(struct mm_struct *mm) ^~~~~~~~~~ ../fs/proc/task_mmu.c:24:6: warning: 'task_mem' defined but not used [-Wunused-function] void task_mem(struct seq_file *m, struct mm_struct *mm) ^~~~~~~~ cc1: some warnings being treated as errors make[2]: *** [fs/proc/task_mmu.o] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [fs/proc/] Error 2 make: *** [sub-make] Error 2 make[2]: *** No rule to make target 'fs/proc//task_mmu.o', needed by 'fs/proc//proc.o'. make[2]: Target '__build' not remade because of errors. make[1]: *** [_module_fs/proc/] Error 2 make[1]: Target '_all' not remade because of errors. make: *** [sub-make] Error 2 Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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