diff options
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/sysdep-i386/barrier.h | 9 | ||||
| -rw-r--r-- | arch/um/include/sysdep-x86_64/barrier.h | 7 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/um/include/sysdep-i386/barrier.h b/arch/um/include/sysdep-i386/barrier.h new file mode 100644 index 0000000..b58d52c --- /dev/null +++ b/arch/um/include/sysdep-i386/barrier.h @@ -0,0 +1,9 @@ +#ifndef __SYSDEP_I386_BARRIER_H +#define __SYSDEP_I386_BARRIER_H + +/* Copied from include/asm-i386 for use by userspace. i386 has the option + * of using mfence, but I'm just using this, which works everywhere, for now. + */ +#define mb() asm volatile("lock; addl $0,0(%esp)") + +#endif diff --git a/arch/um/include/sysdep-x86_64/barrier.h b/arch/um/include/sysdep-x86_64/barrier.h new file mode 100644 index 0000000..7b610be --- /dev/null +++ b/arch/um/include/sysdep-x86_64/barrier.h @@ -0,0 +1,7 @@ +#ifndef __SYSDEP_X86_64_BARRIER_H +#define __SYSDEP_X86_64_BARRIER_H + +/* Copied from include/asm-x86_64 for use by userspace. */ +#define mb() asm volatile("mfence":::"memory") + +#endif |
