[S390] remove superfluous TIF_USEDFPU bit
The TIF_USEDFPU bit is always 0 for s390 and it is not tested anywhere.
Remove the bit. At the same time remove the calls to clear_used_math()
as well. The PF_USED_MATH bit is never set for s390 either.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 07eb61b..66069e7 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -93,13 +93,12 @@
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
-#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
-#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
+#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_31BIT 18 /* 32bit process */
-#define TIF_MEMDIE 19
-#define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */
-#define TIF_FREEZE 21 /* thread is freezing for suspend */
+#define TIF_31BIT 17 /* 32bit process */
+#define TIF_MEMDIE 18
+#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
+#define TIF_FREEZE 20 /* thread is freezing for suspend */
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
@@ -112,7 +111,6 @@
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
-#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
#define _TIF_FREEZE (1<<TIF_FREEZE)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index b98fe8e..00b6d1d 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -153,8 +153,6 @@
void flush_thread(void)
{
- clear_used_math();
- clear_tsk_thread_flag(current, TIF_USEDFPU);
}
void release_thread(struct task_struct *dead_task)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0663287..2148ad3 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -124,12 +124,6 @@
*/
get_cpu_id(&S390_lowcore.cpu_id);
- /*
- * Force FPU initialization:
- */
- clear_thread_flag(TIF_USEDFPU);
- clear_used_math();
-
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
BUG_ON(current->mm);
