diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 790ea68ecf80..082bd3669286 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1,6 +1,7 @@ config ARM bool default y + select ARCH_SUPPORTS_ATOMIC_RMW select HAVE_DMA_API_DEBUG select HAVE_IDE if PCI || ISA || PCMCIA select HAVE_MEMBLOCK diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 16ef838b3cb6..bec952d89032 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -137,6 +137,7 @@ config PPC select HAVE_BPF_JIT if (PPC64 && NET) select HAVE_ARCH_JUMP_LABEL select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_SUPPORTS_ATOMIC_RMW config EARLY_PRINTK bool diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 88d442d49acb..f2f3574dcdfa 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -57,6 +57,7 @@ config SPARC64 select IRQ_PREFLOW_FASTEOI select ARCH_HAVE_NMI_SAFE_CMPXCHG select HAVE_C_RECORDMCOUNT + select ARCH_SUPPORTS_ATOMIC_RMW config ARCH_DEFCONFIG string diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fb2e69db9c76..901447e3a427 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -75,6 +75,7 @@ config X86 select HAVE_BPF_JIT if (X86_64 && NET) select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_SUPPORTS_ATOMIC_RMW config INSTRUCTION_DECODER def_bool (KPROBES || PERF_EVENTS) diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index 5068e2a4e75f..61ebb49bdee8 100644 --- a/kernel/Kconfig.locks +++ b/kernel/Kconfig.locks @@ -198,5 +198,9 @@ config INLINE_WRITE_UNLOCK_IRQ config INLINE_WRITE_UNLOCK_IRQRESTORE def_bool !DEBUG_SPINLOCK && ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE +config ARCH_SUPPORTS_ATOMIC_RMW + bool + config MUTEX_SPIN_ON_OWNER - def_bool SMP && !DEBUG_MUTEXES + def_bool y + depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW