/* SPDX-License-Identifier: GPL-2.0 *///// Code shared between 32 and 64 bit #include <asm/spec-ctrl.h> void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p); /* * This needs to be inline to optimize for the common case where no extra * work needs to be done. */static inline void switch_to_extra(struct task_struct *prev,				   struct task_struct *next){	unsigned long next_tif = task_thread_info(next)->flags;	unsigned long prev_tif = task_thread_info(prev)->flags; 	if (IS_ENABLED(CONFIG_SMP)) {		/*		 * Avoid __switch_to_xtra() invocation when conditional		 * STIBP is disabled and the only different bit is		 * TIF_SPEC_IB. For CONFIG_SMP=n TIF_SPEC_IB is not		 * in the TIF_WORK_CTXSW masks.		 */		if (!static_branch_likely(&switch_to_cond_stibp)) {			prev_tif &= ~_TIF_SPEC_IB;			next_tif &= ~_TIF_SPEC_IB;		}	} 	/*	 * __switch_to_xtra() handles debug registers, i/o bitmaps,	 * speculation mitigations etc.	 */	if (unlikely(next_tif & _TIF_WORK_CTXSW_NEXT ||		     prev_tif & _TIF_WORK_CTXSW_PREV))		__switch_to_xtra(prev, next);}