MIPS: Optimize get_user and put_user for 64-bit
A long for the error value leads to unnecessary sign extensions. This
patch shrinks an ip27_defconfig kernel build with gcc 4.3.0 by 2256 bytes.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/uaccess.h b/include/asm-mips/uaccess.h
index 66523d6..b895144 100644
--- a/include/asm-mips/uaccess.h
+++ b/include/asm-mips/uaccess.h
@@ -224,7 +224,7 @@
#define __get_user_nocheck(x, ptr, size) \
({ \
- long __gu_err; \
+ int __gu_err; \
\
__get_user_common((x), size, ptr); \
__gu_err; \
@@ -232,7 +232,7 @@
#define __get_user_check(x, ptr, size) \
({ \
- long __gu_err = -EFAULT; \
+ int __gu_err = -EFAULT; \
const __typeof__(*(ptr)) __user * __gu_ptr = (ptr); \
\
if (likely(access_ok(VERIFY_READ, __gu_ptr, size))) \
@@ -304,7 +304,7 @@
#define __put_user_nocheck(x, ptr, size) \
({ \
__typeof__(*(ptr)) __pu_val; \
- long __pu_err = 0; \
+ int __pu_err = 0; \
\
__pu_val = (x); \
switch (size) { \
@@ -321,7 +321,7 @@
({ \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
__typeof__(*(ptr)) __pu_val = (x); \
- long __pu_err = -EFAULT; \
+ int __pu_err = -EFAULT; \
\
if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) { \
switch (size) { \