From 851b6cb17c9912bc0cb452e477c04542b01db51b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 11 Sep 2019 14:51:19 +0200 Subject: um: Use real DMA barriers When we have virtio enabled, we must have real barriers since we may be running on an SMP machine (quite likely are, in fact), so the other process can be on another CPU. Since in any other case we don't really use DMA barriers, remove their override completely so real barriers will get used. In the future we might need them for other cases as well. Signed-off-by: Johannes Berg Signed-off-by: Richard Weinberger --- arch/x86/um/asm/barrier.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h index eb0654f39fd2..165be7f9a964 100644 --- a/arch/x86/um/asm/barrier.h +++ b/arch/x86/um/asm/barrier.h @@ -23,9 +23,6 @@ #endif /* CONFIG_X86_32 */ -#define dma_rmb() barrier() -#define dma_wmb() barrier() - #include #endif -- cgit v1.2.3