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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-07-08 17:14:48 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-02-13 00:36:22 +0100 |
| commit | 73bab656061ca0b52a2d997d952b5d820b27bed4 (patch) | |
| tree | 92ffe540634759ac89ecba56ab4df1998e83f4b7 | |
| parent | e689ddc887458f0841fd8f74110a985c91621e42 (diff) | |
| download | rt-linux-73bab656061ca0b52a2d997d952b5d820b27bed4.tar.gz | |
jump-label: disable if stop_machine() is used
Some architectures are using stop_machine() while switching the opcode which
leads to latency spikes.
The architectures which use stop_machine() atm:
- ARM stop machine
- s390 stop machine
The architecures which use other sorcery:
- MIPS
- X86
- powerpc
- sparc
- arm64
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[bigeasy: only ARM for now]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | arch/arm/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 34e1569a11ee32..aba1fdfc9df050 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -33,7 +33,7 @@ config ARM select HARDIRQS_SW_RESEND select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 - select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 + select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !PREEMPT_RT_BASE select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) select HAVE_ARCH_TRACEHOOK |