From: Johannes Berg Date: Wed, 11 Sep 2019 12:51:19 +0000 (+0200) Subject: um: Use real DMA barriers X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=851b6cb17c9912bc0cb452e477c04542b01db51b;p=linux.git 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 --- diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h index eb0654f39fd23..165be7f9a9644 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