On Wed, Apr 07, 2021 at 10:35:43AM -0700, Nick Desaulniers wrote: > While removing allnoconfig_y from Kconfig, ARCH=mips allnoconfig builds > started failing with the error: > > WARNING: modpost: vmlinux.o(.text+0x9c70): Section mismatch in reference > from the function reserve_exception_space() to the function > .meminit.text:memblock_reserve() > The function reserve_exception_space() references the function __meminit > memblock_reserve(). > This is often because reserve_exception_space lacks a __meminit > annotation or the annotation of memblock_reserve is wrong. > ERROR: modpost: Section mismatches detected. > Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them. > > allnoconfig disables DEBUG_KERNEL and thus ARCH_KEEP_MEMBLOCK, which > changes __init_memblock to be equivalent to __meminit triggering the > above error. > > Link: https://lore.kernel.org/linux-kbuild/20210313194836.372585-11-masahiroy@xxxxxxxxxx/ > Fixes: commit a8c0f1c634507 ("MIPS: Select ARCH_KEEP_MEMBLOCK if s/commit // > DEBUG_KERNEL to enable sysfs memblock debug") > Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> > Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx> > Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx> Guenter > --- > arch/mips/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index e9893cd34992..702648f60e41 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -12,7 +12,7 @@ config MIPS > select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST > select ARCH_HAS_UBSAN_SANITIZE_ALL > select ARCH_HAS_GCOV_PROFILE_ALL > - select ARCH_KEEP_MEMBLOCK if DEBUG_KERNEL > + select ARCH_KEEP_MEMBLOCK > select ARCH_SUPPORTS_UPROBES > select ARCH_USE_BUILTIN_BSWAP > select ARCH_USE_CMPXCHG_LOCKREF if 64BIT > -- > 2.31.1.295.g9ea45b61b8-goog >
