+CC Michal, linux-arch as it potentially affects other arches ! Hi, On 05/04/2017 01:53 AM, noreply@xxxxxxxxxxxxxx wrote: > FAILED linux-next/axs101_defconfig/arcompact Thu May 04, 18:53 > > http://kisskb.ellerman.id.au/kisskb/buildresult/13022475/ > > Commit: Add linux-next specific files for 20170504 > ef57eb19c96fa099a578aeaed9b9d0dbcc4fe069 > Compiler: arc-buildroot-linux-uclibc-gcc (Buildroot 2015.08.1) 4.8.4 > > Possible errors > --------------- > > arch/arc/include/asm/mmu.h:75:21: error: 'NR_CPUS' undeclared here (not in a function) > make[3]: *** [arch/arc/mm/ioremap.o] Error 1 > make[2]: *** [arch/arc/mm] Error 2 > make[1]: *** [arch/arc] Error 2 > arch/arc/include/asm/mmu.h:75:21: error: 'NR_CPUS' undeclared here (not in a function) > make[3]: *** [kernel/irq/generic-chip.o] Error 1 > make[2]: *** [kernel/irq] Error 2 > make[1]: *** [kernel] Error 2 > arch/arc/include/asm/mmu.h:75:21: error: 'NR_CPUS' undeclared here (not in a function) > make[2]: *** [mm/vmalloc.o] Error 1 > make[1]: *** [mm] Error 2 > make: *** [sub-make] Error 2 I bisected the linux-next ARC build failure (!SMP only) to a subtle side effect of a950a30220657d ("mm, vmalloc: properly track vmalloc users") which includes asm/pgtable.h causing the final include chain (for ARC ioremap.c) to have asm/mmu.h (using NR_CPUS) before linux/threads.h (defining it) The quick fix is to include linux/threads.h and this is just a heads up other arches might run into same - although xtensa and mips with similar mm_context_t seem to build just fine ! -Vineet
