1 files changed, 10 insertions, 0 deletions

diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h
index e699a12cdcca..18e0377f72bb 100644
--- a/arch/sh/include/asm/processor_32.h
+++ b/arch/sh/include/asm/processor_32.h
@@ -111,6 +111,16 @@ struct thread_struct {
 
         /* Extended processor state */
         union thread_xstate *xstate;
+
+        /*
+         * fpu_counter contains the number of consecutive context switches
+         * that the FPU is used. If this is over a threshold, the lazy fpu
+         * saving becomes unlazy to save the trap. This is an unsigned char
+         * so that after 256 times the counter wraps and the behavior turns
+         * lazy again; this to deal with bursty apps that only use FPU for
+         * a short time
+         */
+        unsigned char fpu_counter;
 };
 
 #define INIT_THREAD  {                                          \