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. > 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>