poll_idle() uses smp_cond_load*() as its polling mechanism. arm64 supports an optimized version of this via LDXR, WFE, with LDXR loading a memory region in exclusive state and the WFE waiting for any stores to it. Select ARCH_HAS_OPTIMIZED_POLL so poll_idle() can be used. Signed-off-by: Ankur Arora <ankur.a.arora@xxxxxxxxxx> --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 49f054dcd4de..ef9c22c3cff2 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -38,6 +38,7 @@ config ARM64 select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE + select ARCH_HAS_OPTIMIZED_POLL select ARCH_HAS_PTE_DEVMAP select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_HW_PTE_YOUNG -- 2.43.5
