On 6/3/20 11:22 PM, Ira Weiny wrote: [ ... ]
s390: (does not compile)
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] In file included from ./arch/sparc/include/asm/bug.h:6:0, from ./include/linux/bug.h:5, from ./include/linux/mmdebug.h:5, from ./include/linux/mm.h:9, from mm/huge_memory.c:8: mm/huge_memory.c: In function 'hugepage_init': ./include/linux/compiler.h:403:38: error: call to '__compiletime_assert_127' declared with attribute error: BUILD_BUG_ON failed: ((13 + (13-3))-13) >= 9 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ ./include/linux/compiler.h:384:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ ./include/linux/compiler.h:403:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ ./include/linux/bug.h:24:4: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(cond); \ ^~~~~~~~~~~~ mm/huge_memory.c:403:2: note: in expansion of macro 'MAYBE_BUILD_BUG_ON' MAYBE_BUILD_BUG_ON(HPAGE_PMD_ORDER >= MAX_ORDER); ^~~~~~~~~~~~~~~~~~ make[1]: *** [scripts/Makefile.build:267: mm/huge_memory.o] Error 1 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:1735: mm] Error 2 make: *** Waiting for unfinished jobs....
The s390 error is the same on Linus' master and linux-next. So whatever is causing that has slipped into mainline and/or is something I've broken in the test scripts.
Compiler version related. gcc version 8.x and later no longer work. Bisect points to commit a148866489f ("sched: Replace rq::wake_list"). Oddly enough x86 images are broken as well. You'll have to use an older version of gcc (or presumably clang) until this is fixed.
Guenter