X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Farm%2Fnwfpe%2Ffpmodule.c;h=4c0ab50f399a5385adcedee14a434f281a3c5cd1;hb=refs%2Fheads%2Fvserver;hp=a806fea5c3ed6ccb6a9dfd84b5fa9c517edc16f3;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git

diff --git a/arch/arm/nwfpe/fpmodule.c b/arch/arm/nwfpe/fpmodule.c
index a806fea5c..4c0ab50f3 100644
--- a/arch/arm/nwfpe/fpmodule.c
+++ b/arch/arm/nwfpe/fpmodule.c
@@ -24,8 +24,6 @@
 #include "fpa11.h"
 
 #include <linux/module.h>
-#include <linux/version.h>
-#include <linux/config.h>
 
 /* XXX */
 #include <linux/errno.h>
@@ -34,7 +32,8 @@
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/init.h>
-/* XXX */
+
+#include <asm/thread_notify.h>
 
 #include "softfloat.h"
 #include "fpopcode.h"
@@ -57,16 +56,28 @@ void fp_send_sig(unsigned long sig, struct task_struct *p, int priv);
 extern char fpe_type[];
 #endif
 
+static int nwfpe_notify(struct notifier_block *self, unsigned long cmd, void *v)
+{
+	struct thread_info *thread = v;
+
+	if (cmd == THREAD_NOTIFY_FLUSH)
+		nwfpe_init_fpa(&thread->fpstate);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block nwfpe_notifier_block = {
+	.notifier_call = nwfpe_notify,
+};
+
 /* kernel function prototypes required */
 void fp_setup(void);
 
 /* external declarations for saved kernel symbols */
 extern void (*kern_fp_enter)(void);
-extern void (*fp_init)(union fp_state *);
 
 /* Original value of fp_enter from kernel before patched by fpe_init. */
 static void (*orig_fp_enter)(void);
-static void (*orig_fp_init)(union fp_state *);
 
 /* forward declarations */
 extern void nwfpe_enter(void);
@@ -89,20 +100,20 @@ static int __init fpe_init(void)
 	printk(KERN_WARNING "NetWinder Floating Point Emulator V0.97 ("
 	       NWFPE_BITS " precision)\n");
 
+	thread_register_notifier(&nwfpe_notifier_block);
+
 	/* Save pointer to the old FP handler and then patch ourselves in */
 	orig_fp_enter = kern_fp_enter;
-	orig_fp_init = fp_init;
 	kern_fp_enter = nwfpe_enter;
-	fp_init = nwfpe_init_fpa;
 
 	return 0;
 }
 
 static void __exit fpe_exit(void)
 {
+	thread_unregister_notifier(&nwfpe_notifier_block);
 	/* Restore the values we saved earlier. */
 	kern_fp_enter = orig_fp_enter;
-	fp_init = orig_fp_init;
 }
 
 /*
@@ -117,8 +128,6 @@ fpmodule.c to integrate with the NetBSD kernel (I hope!).
 code to access data in user space in some other source files at the 
 moment (grep for get_user / put_user calls).  --philb]
 
-float_exception_flags is a global variable in SoftFloat.
-
 This function is called by the SoftFloat routines to raise a floating
 point exception.  We check the trap enable byte in the FPSR, and raise
 a SIGFPE exception if necessary.  If not the relevant bits in the 
@@ -130,15 +139,14 @@ void float_raise(signed char flags)
 	register unsigned int fpsr, cumulativeTraps;
 
 #ifdef CONFIG_DEBUG_USER
-	printk(KERN_DEBUG
-	       "NWFPE: %s[%d] takes exception %08x at %p from %08lx\n",
-	       current->comm, current->pid, flags,
-	       __builtin_return_address(0), GET_USERREG()[15]);
+ 	/* Ignore inexact errors as there are far too many of them to log */
+ 	if (flags & ~BIT_IXC)
+ 		printk(KERN_DEBUG
+		       "NWFPE: %s[%d] takes exception %08x at %p from %08lx\n",
+		       current->comm, current->pid, flags,
+		       __builtin_return_address(0), GET_USERREG()->ARM_pc);
 #endif
 
-	/* Keep SoftFloat exception flags up to date.  */
-	float_exception_flags |= flags;
-
 	/* Read fpsr and initialize the cumulativeTraps.  */
 	fpsr = readFPSR();
 	cumulativeTraps = 0;