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Commit 8d2d91e8 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

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: default avatarRalf Baechle <ralf@linux-mips.org>
parent b6263ff2

include/asm-mips/uaccess.h

+4 −4
Original line number Diff line number Diff line
@@ -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) {						\