x86/fpu: Remove 'struct task_struct' usage from drop_fpu()
Migrate this function to pure 'struct fpu' usage.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 9311126..e8f7134 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -358,14 +358,13 @@
__thread_set_has_fpu(fpu);
}
-static inline void drop_fpu(struct task_struct *tsk)
+static inline void drop_fpu(struct fpu *fpu)
{
- struct fpu *fpu = &tsk->thread.fpu;
/*
* Forget coprocessor state..
*/
preempt_disable();
- tsk->thread.fpu.counter = 0;
+ fpu->counter = 0;
if (fpu->has_fpu) {
/* Ignore delayed exceptions from user space */
@@ -394,8 +393,10 @@
*/
static inline void fpu_reset_state(struct task_struct *tsk)
{
+ struct fpu *fpu = &tsk->thread.fpu;
+
if (!use_eager_fpu())
- drop_fpu(tsk);
+ drop_fpu(fpu);
else
restore_init_xstate();
}