diff options
author | Nick Desaulniers <[email protected]> | 2021-09-08 19:25:59 +0100 |
---|---|---|
committer | Russell King (Oracle) <[email protected]> | 2021-10-19 10:37:34 +0100 |
commit | 9d417cbe36eee7afdd85c2e871685f8dab7c2dba (patch) | |
tree | 211330be7d217c0921eb1bdacfca0f061eec6fcd | |
parent | 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f (diff) |
ARM: 9122/1: select HAVE_FUTEX_CMPXCHG
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
Comments from Nick Desaulniers:
See-also: 03b8c7b623c8 ("futex: Allow architectures to skip
futex_atomic_cmpxchg_inatomic() test")
Reported-by: Arnd Bergmann <[email protected]>
Reported-by: Nathan Chancellor <[email protected]>
Suggested-by: Thomas Gleixner <[email protected]>
Signed-off-by: Nick Desaulniers <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Cc: [email protected] # v3.14+
Reviewed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>
-rw-r--r-- | arch/arm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
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 |