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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-07-08 17:14:48 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-12-17 22:00:28 +0100 |
| commit | 71ffda95e799eda9d777e8cf4020a5caf80997e5 (patch) | |
| tree | 63ae865cf6ed7c794d6d0b9883d626a563dbc43f | |
| parent | 3968924db82e8a1e747202ea4d46e76f91cd760d (diff) | |
| download | linux-rt-71ffda95e799eda9d777e8cf4020a5caf80997e5.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 92a8f02cf10d..048b5e9968b4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -64,7 +64,7 @@ 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 && MMU + select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU && !PREEMPT_RT select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_SECCOMP_FILTER if AEABI && !OABI_COMPAT |