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linux-next/arch/x86/include/asm/uaccess_32.h
Al Viro 4b842e4e25 x86: get rid of small constant size cases in raw_copy_{to,from}_user()
Very few call sites where that would be triggered remain, and none
of those is anywhere near hot enough to bother.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-18 15:53:25 -04:00

37 lines
1006 B
C

/* 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>
unsigned long __must_check __copy_user_ll
(void *to, const void *from, unsigned long n);
unsigned long __must_check __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_user_ll((__force void *)to, from, n);
}
static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
return __copy_user_ll(to, (__force const void *)from, n);
}
static __always_inline unsigned long
__copy_from_user_inatomic_nocache(void *to, const void __user *from,
unsigned long n)
{
return __copy_from_user_ll_nocache_nozero(to, from, n);
}
#endif /* _ASM_X86_UACCESS_32_H */