/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_UACCESS_32_H
#define _ASM_X86_UACCESS_32_H

/*
 * User space memory access functions
 */
#include <linux/string.h>
#include <asm/asm.h>
#include <asm/page.h>

#ifdef CONFIG_PAX_MEMORY_UDEREF
#define __set_fs(fs) loadsegment(gs, fs)
#else
#define __set_fs(fs)
#endif

unsigned long __must_check __size_overflow(3) __copy_from_user_ll
        (void *to, const void __user *from, unsigned long n);
unsigned long __must_check __size_overflow(3) __copy_to_user_ll
        (void __user *to, const void *from, unsigned long n);
unsigned long __must_check __size_overflow(3) __copy_from_user_ll_nocache_nozero
        (void *to, const void __user *from, unsigned long n);

static __always_inline unsigned long __must_check
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
    return __copy_to_user_ll(to, from, n);
}

static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
    access_ok_nospec(from, n);

    return __copy_from_user_ll(to, from, n);
}

static __always_inline unsigned long
__copy_from_user_inatomic_nocache(void *to, const void __user *from,
                  unsigned long n)
{
    if ((long)n < 0)
        return n;

    return check_object_size(to, n, false) ? n :
        __copy_from_user_ll_nocache_nozero(to, from, n);
}

unsigned long __must_check clear_user(void __user *mem, unsigned long len) __size_overflow(2);
unsigned long __must_check __clear_user(void __user *mem, unsigned long len) __size_overflow(2);

#endif /* _ASM_X86_UACCESS_32_H */