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 <[email protected]> [bigeasy: only ARM for now] Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
intel · Jul 6, 2017 · 496965c · 496965c
1 parent c2c25b0
commit 496965c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -36,7 +36,7 @@ config ARM
 	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
 	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
 	select HAVE_ARCH_HARDENED_USERCOPY
-	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_BASE
 	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)