x86/fpu: Add debugging check to fpu__save()

[sfrench/cifs-2.6.git] / arch / x86 / kernel / i387.c

diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index ac47278cde719201f846f62c4b9406493b2aa4d4..66f1053ae2cd5c709b041e6f9368d2bbb355690b 100644 (file)
--- 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()) {