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Subject[ 03/10] i387: fix sense of sanity check
3.2-stable review patch.  If anyone has any objections, please let me know.


From: Linus Torvalds <>

commit c38e23456278e967f094b08247ffc3711b1029b2 upstream.

The check for save_init_fpu() (introduced in commit 5b1cbac37798: "i387:
make irq_fpu_usable() tests more robust") was the wrong way around, but
I hadn't noticed, because my "tests" were bogus: the FPU exceptions are
disabled by default, so even doing a divide by zero never actually
triggers this code at all unless you do extra work to enable them.

So if anybody did enable them, they'd get one spurious warning.

Signed-off-by: Linus Torvalds <>
Signed-off-by: Greg Kroah-Hartman <>

arch/x86/include/asm/i387.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -404,7 +404,7 @@ static inline void irq_ts_restore(int TS
static inline void save_init_fpu(struct task_struct *tsk)
- WARN_ON_ONCE(task_thread_info(tsk)->status & TS_USEDFPU);
+ WARN_ON_ONCE(!(task_thread_info(tsk)->status & TS_USEDFPU));

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