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 (file)
--- a/include/asm-mips/uaccess.h
+++ b/include/asm-mips/uaccess.h
@@ -224,7 +224,7 @@ do {                                                                        \
 
 #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 @@ do {                                                                        \
 
 #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 @@ do {                                                                        \
 #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 @@ do {                                                                        \
 ({                                                                     \
        __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) {                                         \