[Linux-mips-commits]CVS: linux/arch/mips/kernel ptrace.c,1.5,1.6 process.c,1.4,1.5 signal.c,1.2,1.3

[James S. <jsi...@us...>]

Update of /cvsroot/linux-mips/linux/arch/mips/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv24711/arch/mips/kernel

Modified Files:
	process.c signal.c 
Added Files:
	ptrace.c 
Log Message:
Don't set CU1 bit if we don't have an FPU.  Some b0rken silicon doesn't like it at all.


Index: process.c
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/process.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -d -r1.4 -r1.5
--- process.c	2001/10/19 21:19:38	1.4
+++ process.c	2001/10/31 17:28:54	1.5
@@ -56,8 +56,8 @@
 void exit_thread(void)
 {
 	/* Forget lazy fpu state */
-	if (last_task_used_math == current) {
-		set_cp0_status(ST0_CU1);
+	if (last_task_used_math == current && mips_cpu.options & MIPS_CPU_FPU) {
+		__enable_fpu();
 		__asm__ __volatile__("cfc1\t$0,$31");
 		last_task_used_math = NULL;
 	}
@@ -66,8 +66,8 @@
 void flush_thread(void)
 {
 	/* Forget lazy fpu state */
-	if (last_task_used_math == current) {
-		set_cp0_status(ST0_CU1);
+	if (last_task_used_math == current && mips_cpu.options & MIPS_CPU_FPU) {
+		__enable_fpu();
 		__asm__ __volatile__("cfc1\t$0,$31");
 		last_task_used_math = NULL;
 	}
@@ -85,7 +85,7 @@
 
 	if (last_task_used_math == current)
 		if (mips_cpu.options & MIPS_CPU_FPU) {
-			set_cp0_status(ST0_CU1);
+			__enable_fpu();
 			save_fp(p);
 		}
 	/* set up new TSS. */

Index: signal.c
===================================================================
RCS file: /cvsroot/linux-mips/linux/arch/mips/kernel/signal.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- signal.c	2001/10/19 21:19:38	1.2
+++ signal.c	2001/10/31 17:28:54	1.3
@@ -22,6 +22,7 @@
 
 #include <asm/asm.h>
 #include <asm/bitops.h>
+#include <asm/cpu.h>
 #include <asm/pgalloc.h>
 #include <asm/stackframe.h>
 #include <asm/uaccess.h>
@@ -355,7 +356,7 @@
 	err |= __put_user(owned_fp, &sc->sc_ownedfp);
 
 	if (current->used_math) {	/* fp is active.  */
-		set_cp0_status(ST0_CU1);
+		enable_fpu();
 		err |= save_fp_context(sc);
 		last_task_used_math = NULL;
 		regs->cp0_status &= ~ST0_CU1;