Thanks! On 07/16, kbuild test robot wrote: > > tree: git://git.cmpxchg.org/linux-mmotm.git master > head: 6102e3c755ac0084fdce65f69a7a149fc51a8a86 > commit: db5e4748f77b7cefa37e61324cc440f8670213c2 [140/321] mm: move ->mremap() from file_operations to vm_operations_struct > config: sh-rsk7269_defconfig (attached as .config) > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout db5e4748f77b7cefa37e61324cc440f8670213c2 > # save the attached .config to linux build tree > make.cross ARCH=sh doesn't work for me... > All error/warnings (new ones prefixed by >>): > > >> fs/built-in.o:(.rodata+0x1090): undefined reference to `filemap_page_mkwrite' but the problem looks clear: CONFIG_MMU is not set, so we need a dummy filemap_page_mkwrite() along with generic_file_mmap() and generic_file_readonly_mmap(). I'll send the fix, but... Benjamin, Jeff, shouldn't AIO depend on MMU? Or it can actually work even if CONFIG_MMU=n? Oleg. --- a/init/Kconfig +++ b/init/Kconfig @@ -1558,6 +1558,7 @@ config SHMEM config AIO bool "Enable AIO support" if EXPERT + depends on MMU default y help This option enables POSIX asynchronous I/O which may by used -- 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>