futex.h (b74b953b998bcc2db91b694446f3a2619ec32de6) futex.h (247055aa21ffef1c49dd64710d5e94c2aee19b58)
1#ifndef _ASM_ARM_FUTEX_H
2#define _ASM_ARM_FUTEX_H
3
4#ifdef __KERNEL__
5
6#ifdef CONFIG_SMP
7
8#include <asm-generic/futex.h>
9
10#else /* !SMP, we can work around lack of atomic ops by disabling preemption */
11
12#include <linux/futex.h>
13#include <linux/preempt.h>
14#include <linux/uaccess.h>
15#include <asm/errno.h>
1#ifndef _ASM_ARM_FUTEX_H
2#define _ASM_ARM_FUTEX_H
3
4#ifdef __KERNEL__
5
6#ifdef CONFIG_SMP
7
8#include <asm-generic/futex.h>
9
10#else /* !SMP, we can work around lack of atomic ops by disabling preemption */
11
12#include <linux/futex.h>
13#include <linux/preempt.h>
14#include <linux/uaccess.h>
15#include <asm/errno.h>
16#include <asm/domain.h>
16
17#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
18 __asm__ __volatile__( \
17
18#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
19 __asm__ __volatile__( \
19 "1: ldrt %1, [%2]\n" \
20 "1: " T(ldr) " %1, [%2]\n" \
20 " " insn "\n" \
21 " " insn "\n" \
21 "2: strt %0, [%2]\n" \
22 "2: " T(str) " %0, [%2]\n" \
22 " mov %0, #0\n" \
23 "3:\n" \
24 " .pushsection __ex_table,\"a\"\n" \
25 " .align 3\n" \
26 " .long 1b, 4f, 2b, 4f\n" \
27 " .popsection\n" \
28 " .pushsection .fixup,\"ax\"\n" \
29 "4: mov %0, %4\n" \

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92 int val;
93
94 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
95 return -EFAULT;
96
97 pagefault_disable(); /* implies preempt_disable() */
98
99 __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
23 " mov %0, #0\n" \
24 "3:\n" \
25 " .pushsection __ex_table,\"a\"\n" \
26 " .align 3\n" \
27 " .long 1b, 4f, 2b, 4f\n" \
28 " .popsection\n" \
29 " .pushsection .fixup,\"ax\"\n" \
30 "4: mov %0, %4\n" \

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93 int val;
94
95 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
96 return -EFAULT;
97
98 pagefault_disable(); /* implies preempt_disable() */
99
100 __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
100 "1: ldrt %0, [%3]\n"
101 "1: " T(ldr) " %0, [%3]\n"
101 " teq %0, %1\n"
102 " it eq @ explicit IT needed for the 2b label\n"
102 " teq %0, %1\n"
103 " it eq @ explicit IT needed for the 2b label\n"
103 "2: streqt %2, [%3]\n"
104 "2: " T(streq) " %2, [%3]\n"
104 "3:\n"
105 " .pushsection __ex_table,\"a\"\n"
106 " .align 3\n"
107 " .long 1b, 4f, 2b, 4f\n"
108 " .popsection\n"
109 " .pushsection .fixup,\"ax\"\n"
110 "4: mov %0, %4\n"
111 " b 3b\n"

--- 14 unchanged lines hidden --- 		105 "3:\n"
106 " .pushsection __ex_table,\"a\"\n"
107 " .align 3\n"
108 " .long 1b, 4f, 2b, 4f\n"
109 " .popsection\n"
110 " .pushsection .fixup,\"ax\"\n"
111 "4: mov %0, %4\n"
112 " b 3b\n"

--- 14 unchanged lines hidden ---