projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 07d207ac ACM |
2 | /* |
| 3 | * Copied from the kernel sources: | |
| 4 | * | |
| 5 | * Copyright IBM Corp. 1999, 2009 | |
| 6 | * | |
| 7 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef __TOOLS_LINUX_ASM_BARRIER_H | |
| 11 | #define __TOOLS_LINUX_ASM_BARRIER_H | |
| 12 | ||
| 13 | /* | |
| 14 | * Force strict CPU ordering. | |
| 15 | * And yes, this is required on UP too when we're talking | |
| 16 | * to devices. | |
| 17 | */ | |
| 18 | ||
| 19 | #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES | |
| 20 | /* Fast-BCR without checkpoint synchronization */ | |
| 21 | #define __ASM_BARRIER "bcr 14,0\n" | |
| 22 | #else | |
| 23 | #define __ASM_BARRIER "bcr 15,0\n" | |
| 24 | #endif | |
| 25 | ||
| 26 | #define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0) | |
| 27 | ||
| 28 | #define rmb() mb() | |
| 29 | #define wmb() mb() | |
| 30 | ||
| 31 | #endif /* __TOOLS_LIB_ASM_BARRIER_H */ |