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38 lines
1.2 KiB
38 lines
1.2 KiB
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# ChangeSet
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# We need to clear all exceptions before synchronizing
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# with the FPU, since we aren't ready to handle a FP
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# exception here and we're getting rid of all FP state.
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# Special thanks to Alexander Nyberg for reports and
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# testing. Alternate patches by Sergey Vlasov and Andi
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# Kleen, who both worked on this.
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# Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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diff -Nru a/include/asm-i386/i387.h b/include/asm-i386/i387.h
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--- a/include/asm-i386/i387.h 2004-06-15 08:57:43 -07:00
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+++ b/include/asm-i386/i387.h 2004-06-15 08:57:43 -07:00
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@@ -34,7 +34,7 @@
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#define clear_fpu( tsk ) do { \
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if ( tsk->flags & PF_USEDFPU ) { \
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- asm volatile("fwait"); \
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+ asm volatile("fnclex ; fwait"); \
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tsk->flags &= ~PF_USEDFPU; \
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stts(); \
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} \
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diff -Naur a/include/asm-x86_64/i387.h b/include/asm-x86_64/i387.h
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--- a/include/asm-x86_64/i387.h 2003-08-25 13:44:44.000000000 +0200
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+++ b/include/asm-x86_64/i387.h 2004-06-13 05:27:55.000000000 +0200
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@@ -34,7 +34,7 @@
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#define clear_fpu( tsk ) do { \
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if ( tsk->flags & PF_USEDFPU ) { \
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- asm volatile("fwait"); \
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+ asm volatile("fnclex ; fwait"); \
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tsk->flags &= ~PF_USEDFPU; \
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stts(); \
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} \
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