Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs (a22681fa) · Commits · e / devices / android_kernel_xiaomi_markw

include/linux/lglock.h

+32 −4

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@
		#include <linux/spinlock.h>
		#include <linux/lockdep.h>
		#include <linux/percpu.h>
		#include <linux/cpu.h>

		/* can make br locks by using local lock for read side, global lock for write */
		#define br_lock_init(name) name##_lock_init()
		@@ -72,9 +73,31 @@

		#define DEFINE_LGLOCK(name) \
		\
		DEFINE_SPINLOCK(name##_cpu_lock); \
		cpumask_t name##_cpus __read_mostly; \
		DEFINE_PER_CPU(arch_spinlock_t, name##_lock); \
		DEFINE_LGLOCK_LOCKDEP(name); \
		\
		static int \
		name##_lg_cpu_callback(struct notifier_block *nb, \
		unsigned long action, void *hcpu) \
		{ \
		switch (action & ~CPU_TASKS_FROZEN) { \
		case CPU_UP_PREPARE: \
		spin_lock(&name##_cpu_lock); \
		cpu_set((unsigned long)hcpu, name##_cpus); \
		spin_unlock(&name##_cpu_lock); \
		break; \
		case CPU_UP_CANCELED: case CPU_DEAD: \
		spin_lock(&name##_cpu_lock); \
		cpu_clear((unsigned long)hcpu, name##_cpus); \
		spin_unlock(&name##_cpu_lock); \
		} \
		return NOTIFY_OK; \
		} \
		static struct notifier_block name##_lg_cpu_notifier = { \
		.notifier_call = name##_lg_cpu_callback, \
		}; \
		void name##_lock_init(void) { \
		int i; \
		LOCKDEP_INIT_MAP(&name##_lock_dep_map, #name, &name##_lock_key, 0); \
		@@ -83,6 +106,11 @@
		lock = &per_cpu(name##_lock, i); \
		*lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; \
		} \
		register_hotcpu_notifier(&name##_lg_cpu_notifier); \
		get_online_cpus(); \
		for_each_online_cpu(i) \
		cpu_set(i, name##_cpus); \
		put_online_cpus(); \
		} \
		EXPORT_SYMBOL(name##_lock_init); \
		\
		@@ -124,9 +152,9 @@
		\
		void name##_global_lock_online(void) { \
		int i; \
		preempt_disable(); \
		spin_lock(&name##_cpu_lock); \
		rwlock_acquire(&name##_lock_dep_map, 0, 0, _RET_IP_); \
		for_each_online_cpu(i) { \
		for_each_cpu(i, &name##_cpus) { \
		arch_spinlock_t *lock; \
		lock = &per_cpu(name##_lock, i); \
		arch_spin_lock(lock); \
		@@ -137,12 +165,12 @@
		void name##_global_unlock_online(void) { \
		int i; \
		rwlock_release(&name##_lock_dep_map, 1, _RET_IP_); \
		for_each_online_cpu(i) { \
		for_each_cpu(i, &name##_cpus) { \
		arch_spinlock_t *lock; \
		lock = &per_cpu(name##_lock, i); \
		arch_spin_unlock(lock); \
		} \
		preempt_enable(); \
		spin_unlock(&name##_cpu_lock); \
		} \
		EXPORT_SYMBOL(name##_global_unlock_online); \
		\