sched: remove ARCH specific fpu_counter from task_struct

fpu_counter in task_struct was used only by sh/x86.  Both of these now
carry it in ARCH specific thread_struct, hence this can now be removed
from generic task_struct, shrinking it slightly for other arches.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mundt <paul.mundt@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 045b0d2..5e226fe 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1062,15 +1062,6 @@ struct task_struct {
        struct hlist_head preempt_notifiers;
 #endif
 
-       /*
-        * 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;
 #ifdef CONFIG_BLK_DEV_IO_TRACE
        unsigned int btrace_seq;
 #endif