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[PATCH] uml: adapt asm/futex.h to our arch

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Follow up to 4732efbeb9 - uml must just reuse
as-is the backing architecture support. There is a micro-fixup is needed for the
included file, which won't affect i386 behaviour at all.

I've not tested compilation on x86_64, only on x86, but the code is almost the
same except the culprit test, so everything should be ok on x86_64 too.

Cc: Jakub Jelinek <jakub@redhat.com>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2005-09-21 18:37:14 +02:00 committed by Linus Torvalds
parent f62378fcfc
commit c51179fb0c
2 changed files with 6 additions and 47 deletions
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2
include/asm-i386/futex.h
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@ -61,7 +61,7 @@ futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
if (op == FUTEX_OP_SET)
__futex_atomic_op1("xchgl %0, %2", ret, oldval, uaddr, oparg);
else {
#ifndef CONFIG_X86_BSWAP
#if !defined(CONFIG_X86_BSWAP) && !defined(CONFIG_UML)
if (boot_cpu_data.x86 == 3)
ret = -ENOSYS;
else

51
include/asm-um/futex.h
View File

@ -1,53 +1,12 @@
#ifndef _ASM_FUTEX_H
#define _ASM_FUTEX_H
#ifdef __KERNEL__
#ifndef __UM_FUTEX_H
#define __UM_FUTEX_H
#include <linux/futex.h>
#include <asm/errno.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
static inline int
futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret, tem;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
inc_preempt_count();
switch (op) {
case FUTEX_OP_SET:
case FUTEX_OP_ADD:
case FUTEX_OP_OR:
case FUTEX_OP_ANDN:
case FUTEX_OP_XOR:
default:
ret = -ENOSYS;
}
dec_preempt_count();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
return ret;
}
#include "asm/arch/futex.h"
#endif
#endif