Unverified Commit 34c4be6c authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!7226 x86/fpu: Invalidate FPU state correctly on exec() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Yang Yingliang <yangyingliang@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/NTEOFRRVD4YAZY5R2WWLZKMBHHH62NTW/ 
 
https://gitee.com/openeuler/kernel/issues/I9NZ3E 
 
Link:https://gitee.com/openeuler/kernel/pulls/7226

 

Reviewed-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 720afbe5 5b2841c2

arch/x86/kernel/fpu/context.h

+1 −2
Original line number Diff line number Diff line
@@ -19,8 +19,7 @@ 
 * FPU state for a task MUST let the rest of the kernel know that the

 * FPU registers are no longer valid for this task.

 *

 * Either one of these invalidation functions is enough. Invalidate

 * a resource you control: CPU if using the CPU for something else

 * Invalidate a resource you control: CPU if using the CPU for something else

 * (with preemption disabled), FPU for the current task, or a task that

 * is prevented from running by the current task.

 */

arch/x86/kernel/fpu/core.c

+1 −1
Original line number Diff line number Diff line
@@ -659,7 +659,7 @@ static void fpu_reset_fpregs(void) 
	struct fpu *fpu = &current->thread.fpu;



	fpregs_lock();

	fpu__drop(fpu);

	__fpu_invalidate_fpregs_state(fpu);

	/*

	 * This does not change the actual hardware registers. It just

	 * resets the memory image and sets TIF_NEED_FPU_LOAD so a