X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-mips%2Ffpu.h;h=b414a7d9db436ceca3e7a5a697ead88f73b425e0;hb=eaf60d6924759eb2a249c0b568533a90c238061b;hp=b0f50015e25253688fd24e6154f48d70710d5fa3;hpb=59f720eb5a4337b2c4fc0b4c6cfd9c144e492aa8;p=pandora-kernel.git

diff --git a/include/asm-mips/fpu.h b/include/asm-mips/fpu.h
index b0f50015e252..b414a7d9db43 100644
--- a/include/asm-mips/fpu.h
+++ b/include/asm-mips/fpu.h
@@ -10,7 +10,6 @@
 #ifndef _ASM_FPU_H
 #define _ASM_FPU_H
 
-#include <linux/config.h>
 #include <linux/sched.h>
 #include <linux/thread_info.h>
 
@@ -28,11 +27,11 @@
 struct sigcontext;
 struct sigcontext32;
 
-extern asmlinkage int (*save_fp_context)(struct sigcontext *sc);
-extern asmlinkage int (*restore_fp_context)(struct sigcontext *sc);
+extern asmlinkage int (*save_fp_context)(struct sigcontext __user *sc);
+extern asmlinkage int (*restore_fp_context)(struct sigcontext __user *sc);
 
-extern asmlinkage int (*save_fp_context32)(struct sigcontext32 *sc);
-extern asmlinkage int (*restore_fp_context32)(struct sigcontext32 *sc);
+extern asmlinkage int (*save_fp_context32)(struct sigcontext32 __user *sc);
+extern asmlinkage int (*restore_fp_context32)(struct sigcontext32 __user *sc);
 
 extern void fpu_emulator_init_fpu(void);
 extern void _init_fpu(void);
@@ -94,31 +93,52 @@ static inline int is_fpu_owner(void)
 	return cpu_has_fpu && __is_fpu_owner();
 }
 
-static inline void own_fpu(void)
+static inline void __own_fpu(void)
 {
-	if (cpu_has_fpu) {
-		__enable_fpu();
-		KSTK_STATUS(current) |= ST0_CU1;
-		set_thread_flag(TIF_USEDFPU);
+	__enable_fpu();
+	KSTK_STATUS(current) |= ST0_CU1;
+	set_thread_flag(TIF_USEDFPU);
+}
+
+static inline void own_fpu_inatomic(int restore)
+{
+	if (cpu_has_fpu && !__is_fpu_owner()) {
+		__own_fpu();
+		if (restore)
+			_restore_fp(current);
 	}
 }
 
-static inline void lose_fpu(void)
+static inline void own_fpu(int restore)
 {
-	if (cpu_has_fpu) {
+	preempt_disable();
+	own_fpu_inatomic(restore);
+	preempt_enable();
+}
+
+static inline void lose_fpu(int save)
+{
+	preempt_disable();
+	if (is_fpu_owner()) {
+		if (save)
+			_save_fp(current);
 		KSTK_STATUS(current) &= ~ST0_CU1;
 		clear_thread_flag(TIF_USEDFPU);
 		__disable_fpu();
 	}
+	preempt_enable();
 }
 
 static inline void init_fpu(void)
 {
+	preempt_disable();
 	if (cpu_has_fpu) {
+		__own_fpu();
 		_init_fpu();
 	} else {
 		fpu_emulator_init_fpu();
 	}
+	preempt_enable();
 }
 
 static inline void save_fp(struct task_struct *tsk)
@@ -135,13 +155,14 @@ static inline void restore_fp(struct task_struct *tsk)
 
 static inline fpureg_t *get_fpu_regs(struct task_struct *tsk)
 {
-	if (cpu_has_fpu) {
-		if ((tsk == current) && __is_fpu_owner())
+	if (tsk == current) {
+		preempt_disable();
+		if (is_fpu_owner())
 			_save_fp(current);
-		return tsk->thread.fpu.hard.fpr;
+		preempt_enable();
 	}
 
-	return tsk->thread.fpu.soft.fpr;
+	return tsk->thread.fpu.fpr;
 }
 
 #endif /* _ASM_FPU_H */