[PATCH 1/3] MIPS: uaccess: Added __get/__put_kernel_nofault

From: Thomas Bogendoerfer
Date: Tue Mar 30 2021 - 13:27:45 EST


Added __get/__put_kernel_nofault as preparation for removing
get/set_fs.

Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
---
arch/mips/include/asm/uaccess.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index d273a3857809..c5cab0b8f902 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -355,6 +355,18 @@ do { \
(val) = __gu_tmp.t; \
}

+#define HAVE_GET_KERNEL_NOFAULT
+
+#define __get_kernel_nofault(dst, src, type, err_label) \
+do { \
+ int __gu_err; \
+ \
+ __get_kernel_common(*((type *)(dst)), sizeof(type), \
+ (__force type *)(src)); \
+ if (unlikely(__gu_err)) \
+ goto err_label; \
+} while (0)
+
#ifndef CONFIG_EVA
#define __put_kernel_common(ptr, size) __put_user_common(ptr, size)
#else
@@ -483,6 +495,18 @@ do { \

extern void __put_user_unknown(void);

+#define __put_kernel_nofault(dst, src, type, err_label) \
+do { \
+ type __pu_val; \
+ int __pu_err = 0; \
+ \
+ __pu_val = *(__force type *)(src); \
+ __put_kernel_common(((type *)(dst)), sizeof(type)); \
+ if (unlikely(__pu_err)) \
+ goto err_label; \
+} while (0)
+
+
/*
* We're generating jump to subroutines which will be outside the range of
* jump instructions
--
2.29.2