kernel/fpu/core.c

172 		 * which are in @mask even if the current task cannot use
206 	spin_lock_irq(&current->sighand->siglock);
207 	fpuperm = &current->group_leader->thread.fpu.guest_perm;
213 	spin_unlock_irq(&current->sighand->siglock);
319 	struct fpstate *fps = current->thread.fpu.fpstate;
333 	struct fpu *fpu = &current->thread.fpu;
409 	 * Nullify @vpkru to preserve its current value if PKRU's bit isn't set
430 	if (!(current->flags & (PF_KTHREAD | PF_USER_WORKER)) &&
433 		save_fpregs_to_fpstate(&current->thread.fpu);
456  * Sync the FPU register state to current's memory register state when the
457  * current task owns the FPU. The hardware register state is preserved.
461 	WARN_ON_FPU(fpu != &current->thread.fpu);
546 		struct fpu *src_fpu = &current->group_leader->thread.fpu;
548 		spin_lock_irq(&current->sighand->siglock);
552 		spin_unlock_irq(&current->sighand->siglock);
583 /* Clone current's FPU state on fork */
587 	struct fpu *src_fpu = &current->thread.fpu;
622 	 * Save the default portion of the current FPU state into the
628 	 * copying is not valid when current uses non-default states.
668  * Drops current FPU state: deactivates the fpregs and
680 	if (fpu == &current->thread.fpu) {
710  * Reset current->fpu memory state to the init values.
714 	struct fpu *fpu = &current->thread.fpu;
737  * Reset current's user FPU states to the init states.  current's
743 	WARN_ON_FPU(fpu != &current->thread.fpu);
753 	 * Ensure that current's supervisor states are loaded into their
765 	 * state machine that current's FPU registers are in the hardware
768 	 * current's FPU is marked active.
776 	fpstate_reset(&current->thread.fpu);
799 	WARN_ON_ONCE(current->flags & PF_KTHREAD);
811  * If current FPU state according to its tracking (loaded FPU context on this
817 	struct fpu *fpu = &current->thread.fpu;
829 	struct fpu *fpu = &current->thread.fpu;