On Wed, 9 Feb 2022, Naresh Kamboju wrote: > The following build regression noticed while building Linux next 20220209 > arm/riscv/sh of allnoconfig and tinyconfig builds failed with gcc-10, > gcc-11 and clang-13. > > clang: warning: argument unused during compilation: '-march=armv7-m' > [-Wunused-command-line-argument] > mm/swap.c:637:2: error: implicit declaration of function > 'mlock_page_drain' [-Werror,-Wimplicit-function-declaration] > mlock_page_drain(cpu); > ^ > 1 error generated. > make[2]: *** [scripts/Makefile.build:289: mm/swap.o] Error 1 > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> Thanks Naresh, Geert had already reported, and SeongJae sent a fix in https://lore.kernel.org/lkml/20220209094158.21941-2-sj@xxxxxxxxxx/ Turns out that a !CONFIG_MMU CONFIG_SMP config will need one more stub, I just sent a v2 update to SJ's patch in that thread. Hugh
