diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/uaccess_64.h | 11 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c07f492b871a..6ca22706cd64 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -60,6 +60,7 @@ config X86 select ARCH_HAS_PMEM_API if X86_64 select ARCH_HAS_REFCOUNT select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 + select ARCH_HAS_UACCESS_MCSAFE if X86_64 select ARCH_HAS_SET_MEMORY select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h index c63efc07891f..62acb613114b 100644 --- a/arch/x86/include/asm/uaccess_64.h +++ b/arch/x86/include/asm/uaccess_64.h @@ -47,6 +47,17 @@ copy_user_generic(void *to, const void *from, unsigned len) } static __always_inline __must_check unsigned long +copy_to_user_mcsafe(void *to, const void *from, unsigned len) +{ + unsigned long ret; + + __uaccess_begin(); + ret = memcpy_mcsafe(to, from, len); + __uaccess_end(); + return ret; +} + +static __always_inline __must_check unsigned long raw_copy_from_user(void *dst, const void __user *src, unsigned long size) { int ret = 0; |