Hi Andrew, After merging the akpm-current tree, today's linux-next build (x86_64 allmodconfig) failed like this: ./usr/include/linux/prctl.h:132: found __[us]{8,16,32,64} type without #include In file included from /usr/include/x86_64-linux-gnu/sys/prctl.h:23:0, from Documentation/prctl/disable-tsc-test.c:14: ./usr/include/linux/prctl.h:132:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:133:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:134:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:135:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:136:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:137:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:138:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:139:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:140:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:141:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:142:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:143:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:144:2: error: unknown type name '__u32' ./usr/include/linux/prctl.h:145:2: error: unknown type name '__u32' In file included from /usr/include/x86_64-linux-gnu/sys/prctl.h:23:0, from Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c:19: ./usr/include/linux/prctl.h:132:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:133:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:134:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:135:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:136:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:137:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:138:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:139:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:140:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:141:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:142:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:143:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:144:2: error: unknown type name '__u32' ./usr/include/linux/prctl.h:145:2: error: unknown type name '__u32' make[3]: *** [Documentation/prctl/disable-tsc-test] Error 1 make[3]: *** [Documentation/prctl/disable-tsc-ctxt-sw-stress-test] Error 1 In file included from /usr/include/x86_64-linux-gnu/sys/prctl.h:23:0, from Documentation/prctl/disable-tsc-on-off-stress-test.c:19: ./usr/include/linux/prctl.h:132:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:133:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:134:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:135:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:136:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:137:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:138:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:139:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:140:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:141:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:142:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:143:2: error: unknown type name '__u64' ./usr/include/linux/prctl.h:144:2: error: unknown type name '__u32' ./usr/include/linux/prctl.h:145:2: error: unknown type name '__u32' make[3]: *** [Documentation/prctl/disable-tsc-on-off-stress-test] Error 1 make[2]: *** [Documentation/prctl] Error 2 Caused by commit 802d335c0f7f ("prctl: PR_SET_MM -- introduce PR_SET_MM_MAP operation"). I have reverted that commit (and commit c2e04b241d40 ("prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v3-fix") that follows it) for today. -- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/