Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#ifndef _ASM_FUTEX_H

#define _ASM_FUTEX_H

#ifdef __KERNEL__

#include <linux/futex.h>

#include <asm/errno.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;

        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;

}

#endif

#endif