This went in to 2.6 bk head, so it should be OK.

 - atomt

diff -Naur linux-2.6.7-rc3-bk4/include/asm-i386/i387.h linux-2.6.7-rc3-bk4-1/include/asm-i386/i387.h
--- linux-2.6.7-rc3-bk4/include/asm-i386/i387.h	2004-05-10 04:33:06.000000000 +0200
+++ linux-2.6.7-rc3-bk4-1/include/asm-i386/i387.h	2004-06-13 07:17:07.000000000 +0200
@@ -51,7 +51,7 @@
 #define __clear_fpu( tsk )					\
 do {								\
 	if ((tsk)->thread_info->status & TS_USEDFPU) {		\
-		asm volatile("fwait");				\
+		asm volatile("fnclex ; fwait");			\
 		(tsk)->thread_info->status &= ~TS_USEDFPU;	\
 		stts();						\
 	}							\
diff -Naur linux-2.6.7-rc3-bk4/include/asm-x86_64/i387.h linux-2.6.7-rc3-bk4-1/include/asm-x86_64/i387.h
--- linux-2.6.7-rc3-bk4/include/asm-x86_64/i387.h	2004-06-13 06:41:35.000000000 +0200
+++ linux-2.6.7-rc3-bk4-1/include/asm-x86_64/i387.h	2004-06-13 07:17:35.000000000 +0200
@@ -48,7 +48,7 @@
 
 #define clear_fpu(tsk) do { \
 	if ((tsk)->thread_info->status & TS_USEDFPU) {		\
-		asm volatile("fwait");				\
+		asm volatile("fnclex ; fwait");			\
 		(tsk)->thread_info->status &= ~TS_USEDFPU;	\
 		stts();						\
 	}							\