[PATCH] make x86 ptrace use init_fpu()

[Brian Gerst <bgerst@quark.didntduck.org>]

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This fixes PTRACE_GETFPREGS to initilize the fpu struct correctly on 
cpus with fxsr, as well as removing redundant code.

--
				Brian Gerst

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diff -urN linux-2.5.44-bk3/arch/i386/kernel/ptrace.c linux/arch/i386/kernel/ptrace.c
--- linux-2.5.44-bk3/arch/i386/kernel/ptrace.c	Sun Sep 15 22:18:24 2002
+++ linux/arch/i386/kernel/ptrace.c	Tue Oct 29 17:04:59 2002
@@ -375,12 +375,8 @@
 			break;
 		}
 		ret = 0;
-		if ( !child->used_math ) {
-			/* Simulate an empty FPU. */
-			set_fpu_cwd(child, 0x037f);
-			set_fpu_swd(child, 0x0000);
-			set_fpu_twd(child, 0xffff);
-		}
+		if (!child->used_math)
+			init_fpu(child);
 		get_fpregs((struct user_i387_struct *)data, child);
 		break;
 	}
@@ -403,13 +399,8 @@
 			ret = -EIO;
 			break;
 		}
-		if ( !child->used_math ) {
-			/* Simulate an empty FPU. */
-			set_fpu_cwd(child, 0x037f);
-			set_fpu_swd(child, 0x0000);
-			set_fpu_twd(child, 0xffff);
-			set_fpu_mxcsr(child, 0x1f80);
-		}
+		if (!child->used_math)
+			init_fpu(child);
 		ret = get_fpxregs((struct user_fxsr_struct *)data, child);
 		break;
 	}