Messages in this thread | | | Date | Mon, 30 Aug 2021 16:31:46 -0700 | From | Nathan Chancellor <> | Subject | Re: [PATCH] ARM: select HAVE_FUTEX_CMPXCHG |
| |
On Mon, Aug 30, 2021 at 02:38:43PM -0700, Nick Desaulniers wrote: > tglx notes: > This function [futex_detect_cmpxchg] is only needed when an > architecture has to runtime discover whether the CPU supports it or > not. ARM has unconditional support for this, so the obvious thing to > do is the below. > > Fixes linkage failure from Clang randconfigs: > kernel/futex.o:(.text.fixup+0x5c): relocation truncated to fit: R_ARM_JUMP24 against `.init.text' > and boot failures for CONFIG_THUMB2_KERNEL. > > Link: https://github.com/ClangBuiltLinux/linux/issues/325 > Reported-by: Arnd Bergmann <arnd@arndb.de> > Reported-by: Nathan Chancellor <nathan@kernel.org> > Suggested-by: Thomas Gleixner <tglx@linutronix.de> > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
> --- > arch/arm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index fc196421b2ce..b760dd45b734 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -92,6 +92,7 @@ config ARM > select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL > select HAVE_FUNCTION_GRAPH_TRACER if !THUMB2_KERNEL && !CC_IS_CLANG > select HAVE_FUNCTION_TRACER if !XIP_KERNEL > + select HAVE_FUTEX_CMPXCHG if FUTEX > select HAVE_GCC_PLUGINS > select HAVE_HW_BREAKPOINT if PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7) > select HAVE_IRQ_TIME_ACCOUNTING > -- > 2.33.0.259.gc128427fd7-goog
| |