hexagon: switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 1941e4b..0c536a8 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -26,6 +26,7 @@
select GENERIC_CLOCKEVENTS_BROADCAST
select MODULES_USE_ELF_RELA
select GENERIC_CPU_DEVICES
+ select ARCH_HAS_RAW_COPY_USER
---help---
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.
diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h
index 3a7f818..458b698 100644
--- a/arch/hexagon/include/asm/uaccess.h
+++ b/arch/hexagon/include/asm/uaccess.h
@@ -65,19 +65,12 @@
*/
/* Assembly somewhat optimized copy routines */
-unsigned long __copy_from_user_hexagon(void *to, const void __user *from,
+unsigned long raw_copy_from_user(void *to, const void __user *from,
unsigned long n);
-unsigned long __copy_to_user_hexagon(void __user *to, const void *from,
+unsigned long raw_copy_to_user(void __user *to, const void *from,
unsigned long n);
-
-#define __copy_from_user(to, from, n) __copy_from_user_hexagon(to, from, n)
-#define __copy_to_user(to, from, n) __copy_to_user_hexagon(to, from, n)
-
-/*
- * XXX todo: some additonal performance gain is possible by
- * implementing __copy_to/from_user_inatomic, which is much
- * like __copy_to/from_user, but performs slightly less checking.
- */
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count);
#define __clear_user(a, s) __clear_user_hexagon((a), (s))
@@ -104,10 +97,14 @@ static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
return -EFAULT;
if (res > n) {
- copy_from_user(dst, src, n);
+ long left = raw_copy_from_user(dst, src, n);
+ if (unlikely(left))
+ memset(dst + (n - left), 0, left);
return n;
} else {
- copy_from_user(dst, src, res);
+ long left = raw_copy_from_user(dst, src, res);
+ if (unlikely(left))
+ memset(dst + (res - left), 0, left);
return res-1;
}
}
diff --git a/arch/hexagon/kernel/hexagon_ksyms.c b/arch/hexagon/kernel/hexagon_ksyms.c
index af9dec4..00bcad9 100644
--- a/arch/hexagon/kernel/hexagon_ksyms.c
+++ b/arch/hexagon/kernel/hexagon_ksyms.c
@@ -25,8 +25,8 @@
/* Additional functions */
EXPORT_SYMBOL(__clear_user_hexagon);
-EXPORT_SYMBOL(__copy_from_user_hexagon);
-EXPORT_SYMBOL(__copy_to_user_hexagon);
+EXPORT_SYMBOL(raw_copy_from_user);
+EXPORT_SYMBOL(raw_copy_to_user);
EXPORT_SYMBOL(__iounmap);
EXPORT_SYMBOL(__strnlen_user);
EXPORT_SYMBOL(__vmgetie);
diff --git a/arch/hexagon/mm/copy_from_user.S b/arch/hexagon/mm/copy_from_user.S
index 7fc94f3..7da066f 100644
--- a/arch/hexagon/mm/copy_from_user.S
+++ b/arch/hexagon/mm/copy_from_user.S
@@ -44,7 +44,7 @@
#define bytes r2
#define loopcount r5
-#define FUNCNAME __copy_from_user_hexagon
+#define FUNCNAME raw_copy_from_user
#include "copy_user_template.S"
/* LOAD FAULTS from COPY_FROM_USER */
diff --git a/arch/hexagon/mm/copy_to_user.S b/arch/hexagon/mm/copy_to_user.S
index 0cfbcc0..a7b7f8d 100644
--- a/arch/hexagon/mm/copy_to_user.S
+++ b/arch/hexagon/mm/copy_to_user.S
@@ -43,7 +43,7 @@
#define bytes r2
#define loopcount r5
-#define FUNCNAME __copy_to_user_hexagon
+#define FUNCNAME raw_copy_to_user
#include "copy_user_template.S"
/* STORE FAULTS from COPY_TO_USER */