MAJOR=4
MINOR=21
DEVNAME=tty21
     ˆÅÄƒ ß¿Æ í    # SPDX-License-Identifier: GPL-2.0
#
# Makefile for the IEEE 802.1d ethernet bridging layer.
#

obj-$(CONFIG_BRIDGE) += bridge.o

bridge-y	:= br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
			br_ioctl.o br_stp.o br_stp_bpdu.o \
			br_stp_if.o br_stp_timer.o br_netlink.o \
			br_netlink_tunnel.o br_arp_nd_proxy.o

bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o

bridge-$(subst m,y,$(CONFIG_BRIDGE_NETFILTER)) += br_nf_core.o

br_netfilter-y := br_netfilter_hooks.o
br_netfilter-$(subst m,y,$(CONFIG_IPV6)) += br_netfilter_ipv6.o
obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o

bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o br_multicast_eht.o

bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o br_vlan_tunnel.o br_vlan_options.o br_mst.o

bridge-$(CONFIG_NET_SWITCHDEV) += br_switchdev.o

obj-$(CONFIG_NETFILTER) += netfilter/

bridge-$(CONFIG_BRIDGE_MRP)	+= br_mrp_switchdev.o br_mrp.o br_mrp_netlink.o

bridge-$(CONFIG_BRIDGE_CFM)	+= br_cfm.o br_cfm_netlink.o
     ˆÅÄ„.:Ã¿Æ ?÷     /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MMU_NOTIFIER_H
#define _LINUX_MMU_NOTIFIER_H

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/mm_types.h>
#include <linux/mmap_lock.h>
#include <linux/srcu.h>
#include <linux/interval_tree.h>

struct mmu_notifier_subscriptions;
struct mmu_notifier;
struct mmu_notifier_range;
struct mmu_interval_notifier;

/**
 * enum mmu_notifier_event - reason for the mmu notifier callback
 * @MMU_NOTIFY_UNMAP: either munmap() that unmap the range or a mremap() that
 * move the range
 *
 * @MMU_NOTIFY_CLEAR: clear page table entry (many reasons for this like
 * madvise() or replacing a page by another one, ...).
 *
 * @MMU_NOTIFY_PROTECTION_VMA: update is due to protection change for the range
 * ie using the vma access permission (vm_page_prot) to update the whole range
 * is enough no need to inspect changes to the CPU page table (mprotect()
 * syscall)
 *
 * @MMU_NOTIFY_PROTECTION_PAGE: update is due to change in read/write flag for
 * pages in the range so to mirror those changes the user must inspect the CPU
 * page table (from the end callback).
 *
 * @MMU_NOTIFY_SOFT_DIRTY: soft dirty accounting (still same page and same
 * access flags). User should soft dirty the page in the end callback to make
 * sure that anyone relying on soft dirtiness catch pages that might be written
 * through non CPU mappings.
 *
 * @MMU_NOTIFY_RELEASE: used during mmu_interval_notifier invalidate to signal
 * that the mm refcount is zero and the range is no longer accessible.
 *
 * @MMU_NOTIFY_MIGRATE: used during migrate_vma_collect() invalidate to signal
 * a device driver to possibly ignore the invalidation if the
 * owner field matches the driver's device private pgmap owner.
 *
 * @MMU_NOTIFY_EXCLUSIVE: to signal a device driver that the device will no
 * longer have exclusive access to the page. When sent during creation of an
 * exclusive range the owner will be initialised to the value provided by the
 * caller of make_device_exclusive_range(), otherwise the owner will be NULL.
 */
enum mmu_notifier_event {
	MMU_NOTIFY_UNMAP = 0,
	MMU_NOTIFY_CLEAR,
	MMU_NOTIFY_PROTECTION_VMA,
	MMU_NOTIFY_PROTECTION_PAGE,
	MMU_NOTIFY_SOFT_DIRTY,
	MMU_NOTIFY_RELEASE,
	MMU_NOTIFY_MIGRATE,
	MMU_NOTIFY_EXCLUSIVE,
};

#define MMU_NOTIFIER_RANGE_BLOCKABLE (1 << 0)

struct mmu_notifier_ops {
	/*
	 * Called either by mmu_notifier_unregister or when the mm is
	 * being destroyed by exit_mmap, always before all pages are
	 * freed. This can run concurrently with other mmu notifier
	 * methods (the ones invoked outside the mm context) and it
	 * should tear down all secondary mmu mappings and freeze the
	 * secondary mmu. If this method isn't implemented you've to
	 * be sure that nothing could possibly write to the pages
	 * through the secondary mmu by the time the last thread with
	 * tsk->mm == mm exits.
	 *
	 * As side note: the pages freed after ->release returns could
	 * be immediately reallocated by the gart at an a