X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-mips%2Ffutex.h;h=47e5679c235303f5812eb1d4cd39a2140af89016;hb=3f3183709feb35c30ca5f649224d01921870f81c;hp=12d118f1bc9c7768d3a2e14b9ed0458e5569feb6;hpb=4e8f10b7ccf1c3c53a818a157962074a7340732e;p=powerpc.git

diff --git a/include/asm-mips/futex.h b/include/asm-mips/futex.h
index 12d118f1bc..47e5679c23 100644
--- a/include/asm-mips/futex.h
+++ b/include/asm-mips/futex.h
@@ -1,20 +1,21 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2006  Ralf Baechle (ralf@linux-mips.org)
+ */
 #ifndef _ASM_FUTEX_H
 #define _ASM_FUTEX_H
 
 #ifdef __KERNEL__
 
-#include <linux/config.h>
 #include <linux/futex.h>
+#include <asm/barrier.h>
 #include <asm/errno.h>
 #include <asm/uaccess.h>
 #include <asm/war.h>
 
-#ifdef CONFIG_SMP
-#define __FUTEX_SMP_SYNC "	sync					\n"
-#else
-#define __FUTEX_SMP_SYNC
-#endif
-
 #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg)		\
 {									\
 	if (cpu_has_llsc && R10000_LLSC_WAR) {				\
@@ -22,51 +23,53 @@
 		"	.set	push				\n"	\
 		"	.set	noat				\n"	\
 		"	.set	mips3				\n"	\
-		"1:	ll	%1, (%3)	# __futex_atomic_op	\n" \
+		"1:	ll	%1, %4	# __futex_atomic_op	\n"	\
 		"	.set	mips0				\n"	\
 		"	" insn	"				\n"	\
 		"	.set	mips3				\n"	\
-		"2:	sc	$1, (%3)			\n"	\
+		"2:	sc	$1, %2				\n"	\
 		"	beqzl	$1, 1b				\n"	\
-		__FUTEX_SMP_SYNC					\
+		__WEAK_ORDERING_MB					\
 		"3:						\n"	\
 		"	.set	pop				\n"	\
 		"	.set	mips0				\n"	\
 		"	.section .fixup,\"ax\"			\n"	\
-		"4:	li	%0, %5				\n"	\
+		"4:	li	%0, %6				\n"	\
 		"	j	2b				\n"	\
 		"	.previous				\n"	\
 		"	.section __ex_table,\"a\"		\n"	\
 		"	"__UA_ADDR "\t1b, 4b			\n"	\
 		"	"__UA_ADDR "\t2b, 4b			\n"	\
 		"	.previous				\n"	\
-		: "=r" (ret), "=r" (oldval)				\
-		: "0" (0), "r" (uaddr), "Jr" (oparg), "i" (-EFAULT));	\
+		: "=r" (ret), "=&r" (oldval), "=R" (*uaddr)		\
+		: "0" (0), "R" (*uaddr), "Jr" (oparg), "i" (-EFAULT)	\
+		: "memory");						\
 	} else if (cpu_has_llsc) {					\
 		__asm__ __volatile__(					\
 		"	.set	push				\n"	\
 		"	.set	noat				\n"	\
 		"	.set	mips3				\n"	\
-		"1:	ll	%1, (%3)	# __futex_atomic_op	\n" \
+		"1:	ll	%1, %4	# __futex_atomic_op	\n"	\
 		"	.set	mips0				\n"	\
 		"	" insn	"				\n"	\
 		"	.set	mips3				\n"	\
-		"2:	sc	$1, (%3)			\n"	\
+		"2:	sc	$1, %2				\n"	\
 		"	beqz	$1, 1b				\n"	\
-		__FUTEX_SMP_SYNC					\
+		__WEAK_ORDERING_MB					\
 		"3:						\n"	\
 		"	.set	pop				\n"	\
 		"	.set	mips0				\n"	\
 		"	.section .fixup,\"ax\"			\n"	\
-		"4:	li	%0, %5				\n"	\
+		"4:	li	%0, %6				\n"	\
 		"	j	2b				\n"	\
 		"	.previous				\n"	\
 		"	.section __ex_table,\"a\"		\n"	\
 		"	"__UA_ADDR "\t1b, 4b			\n"	\
 		"	"__UA_ADDR "\t2b, 4b			\n"	\
 		"	.previous				\n"	\
-		: "=r" (ret), "=r" (oldval)				\
-		: "0" (0), "r" (uaddr), "Jr" (oparg), "i" (-EFAULT));	\
+		: "=r" (ret), "=&r" (oldval), "=R" (*uaddr)		\
+		: "0" (0), "R" (*uaddr), "Jr" (oparg), "i" (-EFAULT)	\
+		: "memory");						\
 	} else								\
 		ret = -ENOSYS;						\
 }
@@ -85,34 +88,34 @@ futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
 	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
 		return -EFAULT;
 
-	inc_preempt_count();
+	pagefault_disable();
 
 	switch (op) {
 	case FUTEX_OP_SET:
-		__futex_atomic_op("move	$1, %z4", ret, oldval, uaddr, oparg);
+		__futex_atomic_op("move	$1, %z5", ret, oldval, uaddr, oparg);
 		break;
 
 	case FUTEX_OP_ADD:
-		__futex_atomic_op("addu	$1, %1, %z4",
+		__futex_atomic_op("addu	$1, %1, %z5",
 		                  ret, oldval, uaddr, oparg);
 		break;
 	case FUTEX_OP_OR:
-		__futex_atomic_op("or	$1, %1, %z4",
+		__futex_atomic_op("or	$1, %1, %z5",
 		                  ret, oldval, uaddr, oparg);
 		break;
 	case FUTEX_OP_ANDN:
-		__futex_atomic_op("and	$1, %1, %z4",
+		__futex_atomic_op("and	$1, %1, %z5",
 		                  ret, oldval, uaddr, ~oparg);
 		break;
 	case FUTEX_OP_XOR:
-		__futex_atomic_op("xor	$1, %1, %z4",
+		__futex_atomic_op("xor	$1, %1, %z5",
 		                  ret, oldval, uaddr, oparg);
 		break;
 	default:
 		ret = -ENOSYS;
 	}
 
-	dec_preempt_count();
+	pagefault_enable();
 
 	if (!ret) {
 		switch (cmp) {
@@ -149,7 +152,7 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
 		"	.set	mips3					\n"
 		"2:	sc	$1, %1					\n"
 		"	beqzl	$1, 1b					\n"
-		__FUTEX_SMP_SYNC
+		__WEAK_ORDERING_MB
 		"3:							\n"
 		"	.set	pop					\n"
 		"	.section .fixup,\"ax\"				\n"
@@ -176,7 +179,7 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
 		"	.set	mips3					\n"
 		"2:	sc	$1, %1					\n"
 		"	beqz	$1, 1b					\n"
-		__FUTEX_SMP_SYNC
+		__WEAK_ORDERING_MB
 		"3:							\n"
 		"	.set	pop					\n"
 		"	.section .fixup,\"ax\"				\n"