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Diffstat (limited to 'include/asm-x86/futex_64.h')
-rw-r--r--include/asm-x86/futex_64.h125
1 files changed, 0 insertions, 125 deletions
diff --git a/include/asm-x86/futex_64.h b/include/asm-x86/futex_64.h
deleted file mode 100644
index 5cdfb08013c..00000000000
--- a/include/asm-x86/futex_64.h
+++ /dev/null
@@ -1,125 +0,0 @@
-#ifndef _ASM_FUTEX_H
-#define _ASM_FUTEX_H
-
-#ifdef __KERNEL__
-
-#include <linux/futex.h>
-#include <asm/errno.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#define __futex_atomic_op1(insn, ret, oldval, uaddr, oparg) \
- __asm__ __volatile ( \
-"1: " insn "\n" \
-"2: .section .fixup,\"ax\"\n\
-3: mov %3, %1\n\
- jmp 2b\n\
- .previous\n\
- .section __ex_table,\"a\"\n\
- .align 8\n\
- .quad 1b,3b\n\
- .previous" \
- : "=r" (oldval), "=r" (ret), "=m" (*uaddr) \
- : "i" (-EFAULT), "m" (*uaddr), "0" (oparg), "1" (0))
-
-#define __futex_atomic_op2(insn, ret, oldval, uaddr, oparg) \
- __asm__ __volatile ( \
-"1: movl %2, %0\n\
- movl %0, %3\n" \
- insn "\n" \
-"2: " LOCK_PREFIX "cmpxchgl %3, %2\n\
- jnz 1b\n\
-3: .section .fixup,\"ax\"\n\
-4: mov %5, %1\n\
- jmp 3b\n\
- .previous\n\
- .section __ex_table,\"a\"\n\
- .align 8\n\
- .quad 1b,4b,2b,4b\n\
- .previous" \
- : "=&a" (oldval), "=&r" (ret), "=m" (*uaddr), \
- "=&r" (tem) \
- : "r" (oparg), "i" (-EFAULT), "m" (*uaddr), "1" (0))
-
-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;
-
- pagefault_disable();
-
- switch (op) {
- case FUTEX_OP_SET:
- __futex_atomic_op1("xchgl %0, %2", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_ADD:
- __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret, oldval,
- uaddr, oparg);
- break;
- case FUTEX_OP_OR:
- __futex_atomic_op2("orl %4, %3", ret, oldval, uaddr, oparg);
- break;
- case FUTEX_OP_ANDN:
- __futex_atomic_op2("andl %4, %3", ret, oldval, uaddr, ~oparg);
- break;
- case FUTEX_OP_XOR:
- __futex_atomic_op2("xorl %4, %3", ret, oldval, uaddr, oparg);
- break;
- default:
- ret = -ENOSYS;
- }
-
- pagefault_enable();
-
- 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;
-}
-
-static inline int
-futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
-{
- if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
- return -EFAULT;
-
- __asm__ __volatile__(
- "1: " LOCK_PREFIX "cmpxchgl %3, %1 \n"
-
- "2: .section .fixup, \"ax\" \n"
- "3: mov %2, %0 \n"
- " jmp 2b \n"
- " .previous \n"
-
- " .section __ex_table, \"a\" \n"
- " .align 8 \n"
- " .quad 1b,3b \n"
- " .previous \n"
-
- : "=a" (oldval), "=m" (*uaddr)
- : "i" (-EFAULT), "r" (newval), "0" (oldval)
- : "memory"
- );
-
- return oldval;
-}
-
-#endif
-#endif