PCI_CLASS=60000
PCI_ID=8086:1237
PCI_SUBSYS_ID=1AF4:1100
PCI_SLOT_NAME=0000:00:00.0
MODALIAS=pci:v00008086d00001237sv00001AF4sd00001100bc06sc00i00
     #€ЕД‚p ГАЖ X    #/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_

/*
 * Spinlock based version of ext2 atomic bitops
 */

#define ext2_set_bit_atomic(lock, nr, addr)		\
	({						\
		int ret;				\
		spin_lock(lock);			\
		ret = __test_and_set_bit_le(nr, addr);	\
		spin_unlock(lock);			\
		ret;					\
	})

#define ext2_clear_bit_atomic(lock, nr, addr)		\
	({						\
		int ret;				\
		spin_lock(lock);			\
		ret = __test_and_clear_bit_le(nr, addr);	\
		spin_unlock(lock);			\
		ret;					\
	})

#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ */
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  $   '€ЕД„`uЯГa–Эm_J*j"TвЃfа]ё”ЕЈЗ :е    '/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SCHED_MM_H
#define _LINUX_SCHED_MM_H

#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/gfp.h>
#include <linux/sync_core.h>
#include <linux/sched/coredump.h>

/*
 * Routines for handling mm_structs
 */
extern struct mm_struct *mm_alloc(void);

/**
 * mmgrab() - Pin a &struct mm_struct.
 * @mm: The &struct mm_struct to pin.
 *
 * Make sure that @mm will not get freed even after the owning task
 * exits. This doesn't guarantee that the associated address space
 * will still exist later on and mmget_not_zero() has to be used before
 * accessing it.
 *
 * This is a preferred way to pin @mm for a longer/unbounded amount
 * of time.
 *
 * Use mmdrop() to release the reference acquired by mmgrab().
 *
 * See also <Documentation/mm/active_mm.rst> for an in-depth explanation
 * of &mm_struct.mm_count vs &mm_struct.mm_users.
 */
static inline void mmgrab(struct mm_struct *mm)
{
	atomic_inc(&mm->mm_count);
}

extern void __mmdrop(struct mm_struct *mm);

static inline void mmdrop(struct mm_struct *mm)
{
	/*
	 * The implicit full barrier implied by atomic_dec_and_test() is
	 * required by the membarrier system call before returning to
	 * user-space, after storing to rq->curr.
	 */
	if (unlikely(atomic_dec_and_test(&mm->mm_count)))
		__mmdrop(mm);
}

#ifdef CONFIG_PREEMPT_RT
/*
 * RCU callback for delayed mm drop. Not strictly RCU, but call_rcu() is
 * by far the least expensive way to do that.
 */
static inline void __mmdrop_delayed(struct rcu_head *rhp)
{
	struct mm_struct *mm = container_of(rhp, struct mm_struct, delayed_drop);

	__mmdrop(mm);
}

/*
 * Invoked from finish_task_switch(). Delegates the heavy lifting on RT
 * kernels via RCU.
 */
static inline void mmdrop_sched(struct mm_struct *mm)
{
	/* Provides a full memory barrier. See mmdrop() */
	if (atomic_dec_and_test(&mm->mm_count))
		call_rcu(&mm->delayed_drop, __mmdrop_delayed);
}
#else
static inline void mmdrop_sched(struct mm_struct *mm)
{
	mmdrop(mm);
}
#endif

/* Helpers for lazy TLB mm refcounting */
static inline void mmgrab_lazy_tlb(struct mm_struct *mm)
{
	if (IS_ENABLED(CONFIG_MMU_LAZY_TLB_REFCOUNT))
		mmgrab(mm);
}

static inline void mmdrop_lazy_tlb(struct mm_struct *mm)
{
	if (IS_ENABLED(CONFIG_MMU_LAZY_TLB_REFCOUNT)) {
		mmdrop(mm);
	} else {
		/*
		 * mmdrop_lazy_tlb must provide a full memory barrier, see the
		 * membarrier comment finish_task_switch which relies on this.
		 */
		smp_mb();
	}
}

static inline void mmdrop_lazy_tlb_sched(struct mm_struct *mm)
{
	if (IS_ENABLED(CONFIG_MMU_LAZY_TLB_REFCOUNT))
		mmdrop_sched(mm);
	else
		smp_mb(); /* see mmdrop_lazy_tlb() above */
}

/**
 * mmget() - Pin the address space associated with a &struct mm_struct.
 * @mm: The address space to pin.
 *
 * Make sure that the address space of the given &struct mm_struct doesn't
 * go away. This does not protect against parts of the address space being
 * modified or freed, however.
 *
 * Never use this function to pin this address space for an
 * unbounded/indefinite amount of time.
 *
 * Use mmput() to release the reference acquired by mmget().
 *
 * See also <Documentation/mm/active_mm.rst> for