fs/buffer: Convert to hotplug state machine
Install the callbacks via the state machine. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-fsdevel@vger.kernel.org Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-2-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Родитель
bc33b0ca11
Коммит
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16
fs/buffer.c
16
fs/buffer.c
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@ -3403,7 +3403,7 @@ void free_buffer_head(struct buffer_head *bh)
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}
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EXPORT_SYMBOL(free_buffer_head);
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static void buffer_exit_cpu(int cpu)
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static int buffer_exit_cpu_dead(unsigned int cpu)
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{
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int i;
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struct bh_lru *b = &per_cpu(bh_lrus, cpu);
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@ -3414,14 +3414,7 @@ static void buffer_exit_cpu(int cpu)
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}
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this_cpu_add(bh_accounting.nr, per_cpu(bh_accounting, cpu).nr);
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per_cpu(bh_accounting, cpu).nr = 0;
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}
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static int buffer_cpu_notify(struct notifier_block *self,
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unsigned long action, void *hcpu)
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{
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if (action == CPU_DEAD || action == CPU_DEAD_FROZEN)
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buffer_exit_cpu((unsigned long)hcpu);
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return NOTIFY_OK;
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return 0;
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}
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/**
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@ -3471,6 +3464,7 @@ EXPORT_SYMBOL(bh_submit_read);
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void __init buffer_init(void)
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{
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unsigned long nrpages;
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int ret;
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bh_cachep = kmem_cache_create("buffer_head",
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sizeof(struct buffer_head), 0,
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@ -3483,5 +3477,7 @@ void __init buffer_init(void)
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*/
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nrpages = (nr_free_buffer_pages() * 10) / 100;
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max_buffer_heads = nrpages * (PAGE_SIZE / sizeof(struct buffer_head));
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hotcpu_notifier(buffer_cpu_notify, 0);
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ret = cpuhp_setup_state_nocalls(CPUHP_FS_BUFF_DEAD, "fs/buffer:dead",
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NULL, buffer_exit_cpu_dead);
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WARN_ON(ret < 0);
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}
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@ -30,6 +30,7 @@ enum cpuhp_state {
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CPUHP_ACPI_CPUDRV_DEAD,
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CPUHP_S390_PFAULT_DEAD,
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CPUHP_BLK_MQ_DEAD,
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CPUHP_FS_BUFF_DEAD,
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CPUHP_WORKQUEUE_PREP,
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CPUHP_POWER_NUMA_PREPARE,
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CPUHP_HRTIMERS_PREPARE,
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