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-rw-r--r--arch/x86/kernel/i387.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index ac47278c..66f1053 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -119,9 +119,13 @@ EXPORT_SYMBOL(__kernel_fpu_end);
/*
* Save the FPU state (initialize it if necessary):
+ *
+ * This only ever gets called for the current task.
*/
void fpu__save(struct task_struct *tsk)
{
+ WARN_ON(tsk != current);
+
preempt_disable();
if (__thread_has_fpu(tsk)) {
if (use_eager_fpu()) {
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