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-rw-r--r--arch/h8300/Kconfig2
-rw-r--r--arch/m68k/Kconfig4
-rw-r--r--arch/riscv/Kconfig4
-rw-r--r--include/asm-generic/uaccess.h47
4 files changed, 15 insertions, 42 deletions
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 3e3e0f16f7e0..53dfd2d47e0e 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -11,6 +11,8 @@ config H8300
select GENERIC_IRQ_SHOW
select FRAME_POINTER
select GENERIC_CPU_DEVICES
+ select GENERIC_STRNCPY_FROM_USER
+ select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
select COMMON_CLK
select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 96989ad46f66..37a65bed6dfa 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -16,8 +16,8 @@ config M68K
select GENERIC_CPU_DEVICES
select GENERIC_IOMAP
select GENERIC_IRQ_SHOW
- select GENERIC_STRNCPY_FROM_USER if MMU
- select GENERIC_STRNLEN_USER if MMU
+ select GENERIC_STRNCPY_FROM_USER
+ select GENERIC_STRNLEN_USER
select HAVE_AOUT if MMU
select HAVE_ASM_MODVERSIONS
select HAVE_DEBUG_BUGVERBOSE
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 8fcceb8eda07..47bbbcab91b2 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -56,8 +56,8 @@ config RISCV
select GENERIC_PTDUMP if MMU
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
- select GENERIC_STRNCPY_FROM_USER if MMU
- select GENERIC_STRNLEN_USER if MMU
+ select GENERIC_STRNCPY_FROM_USER
+ select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL if MMU && 64BIT
select HANDLE_DOMAIN_IRQ
select HAVE_ARCH_AUDITSYSCALL
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index 2f8a5d3bbd57..10ffa8b5c117 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -119,6 +119,11 @@ static inline void set_fs(mm_segment_t fs)
#ifndef uaccess_kernel
#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
#endif
+
+#ifndef user_addr_max
+#define user_addr_max() (uaccess_kernel() ? ~0UL : TASK_SIZE)
+#endif
+
#endif /* CONFIG_SET_FS */
#define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
@@ -244,44 +249,6 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
extern int __get_user_bad(void) __attribute__((noreturn));
/*
- * Copy a null terminated string from userspace.
- */
-#ifndef strncpy_from_user
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- char *tmp;
-
- if (!access_ok(src, 1))
- return -EFAULT;
-
- strncpy(dst, (const char __force *)src, count);
- for (tmp = dst; *tmp && count > 0; tmp++, count--)
- ;
- return (tmp - dst);
-}
-#endif
-
-#ifndef strnlen_user
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- *
- * Unlike strnlen, strnlen_user includes the nul terminator in
- * its returned count. Callers should check for a returned value
- * greater than N as an indication the string is too long.
- */
-static inline long strnlen_user(const char __user *src, long n)
-{
- if (!access_ok(src, 1))
- return 0;
-
- return strnlen(src, n) + 1;
-}
-#endif
-
-/*
* Zero Userspace
*/
#ifndef __clear_user
@@ -305,4 +272,8 @@ clear_user(void __user *to, unsigned long n)
#include <asm/extable.h>
+__must_check long strncpy_from_user(char *dst, const char __user *src,
+ long count);
+__must_check long strnlen_user(const char __user *src, long n);
+
#endif /* __ASM_GENERIC_UACCESS_H */