| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copied from the kernel sources to tools/perf/: |
| * |
| * Generic barrier definitions. |
| * |
| * It should be possible to use these on really simple architectures, |
| * but it serves more as a starting point for new ports. |
| * |
| * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| */ |
| #ifndef __TOOLS_LINUX_ASM_GENERIC_BARRIER_H |
| #define __TOOLS_LINUX_ASM_GENERIC_BARRIER_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/compiler.h> |
| |
| /* |
| * Force strict CPU ordering. And yes, this is required on UP too when we're |
| * talking to devices. |
| * |
| * Fall back to compiler barriers if nothing better is provided. |
| */ |
| |
| #ifndef mb |
| #define mb() barrier() |
| #endif |
| |
| #ifndef rmb |
| #define rmb() mb() |
| #endif |
| |
| #ifndef wmb |
| #define wmb() mb() |
| #endif |
| |
| #endif /* !__ASSEMBLY__ */ |
| #endif /* __TOOLS_LINUX_ASM_GENERIC_BARRIER_H */ |
