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40 lines
1.2 KiB
40 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 08:53:59 -07:00
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+++ b/include/asm-i386/i387.h 2004-06-15 08:53:59 -07:00
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@@ -51,7 +51,7 @@
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#define __clear_fpu( tsk ) \
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do { \
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if ((tsk)->thread_info->status & TS_USEDFPU) { \
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- asm volatile("fwait"); \
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+ asm volatile("fnclex ; fwait"); \
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(tsk)->thread_info->status &= ~TS_USEDFPU; \
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stts(); \
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} \
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i
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diff -Nru 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 2004-06-15 08:54:33 -07:00
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+++ b/include/asm-x86_64/i387.h 2004-06-15 08:54:33 -07:00
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@@ -48,7 +48,7 @@
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#define clear_fpu(tsk) do { \
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if ((tsk)->thread_info->status & TS_USEDFPU) { \
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- asm volatile("fwait"); \
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+ asm volatile("fnclex ; fwait"); \
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(tsk)->thread_info->status &= ~TS_USEDFPU; \
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stts(); \
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} \
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