From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 23 Mar 2009 21:14:55 +0000 (+0100)
Subject: MIPS: Change {set,clear,change}_c0_<foo> to return old value.
X-Git-Tag: firefly_0821_release~15255^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=89e18eb331cc83fb4923bbc9a93beb5cb53eca0a;p=firefly-linux-kernel-4.4.55.git

MIPS: Change {set,clear,change}_c0_<foo> to return old value.

This is more standard and useful and need for the following fix to work
correctly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 0417516503f6..526f327475ce 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -1391,11 +1391,11 @@ static inline void tlb_write_random(void)
 static inline unsigned int					\
 set_c0_##name(unsigned int set)					\
 {								\
-	unsigned int res;					\
+	unsigned int res, new;					\
 								\
 	res = read_c0_##name();					\
-	res |= set;						\
-	write_c0_##name(res);					\
+	new = res | set;					\
+	write_c0_##name(new);					\
 								\
 	return res;						\
 }								\
@@ -1403,24 +1403,24 @@ set_c0_##name(unsigned int set)					\
 static inline unsigned int					\
 clear_c0_##name(unsigned int clear)				\
 {								\
-	unsigned int res;					\
+	unsigned int res, new;					\
 								\
 	res = read_c0_##name();					\
-	res &= ~clear;						\
-	write_c0_##name(res);					\
+	new = res & ~clear;					\
+	write_c0_##name(new);					\
 								\
 	return res;						\
 }								\
 								\
 static inline unsigned int					\
-change_c0_##name(unsigned int change, unsigned int new)		\
+change_c0_##name(unsigned int change, unsigned int val)		\
 {								\
-	unsigned int res;					\
+	unsigned int res, new;					\
 								\
 	res = read_c0_##name();					\
-	res &= ~change;						\
-	res |= (new & change);					\
-	write_c0_##name(res);					\
+	new = res & ~change;					\
+	new |= (val & change);					\
+	write_c0_##name(new);					\
 								\
 	return res;						\
 }