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57 lines
1.4 KiB
57 lines
1.4 KiB
#include <linux/fs.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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ATOMIC_NOTIFIER_HEAD(show_mem_extra_notifier);
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/**
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* Call show_mem notifiers to print out extra memory information
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* @s: seq_file into which print log out, if Null print to kernel log buffer
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*/
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static void __show_mem_extra_call_notifiers(struct seq_file *s)
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{
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atomic_notifier_call_chain(&show_mem_extra_notifier, 0, s);
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if (s == NULL)
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printk("\n");
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}
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int show_mem_extra_notifier_register(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&show_mem_extra_notifier, nb);
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}
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int show_mem_extra_notifier_unregister(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(&show_mem_extra_notifier, nb);
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}
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void show_mem_extra_call_notifiers(void)
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{
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__show_mem_extra_call_notifiers(NULL);
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}
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static int meminfo_extra_proc_show(struct seq_file *m, void *v)
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{
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__show_mem_extra_call_notifiers(m);
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return 0;
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}
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static int meminfo_extra_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, meminfo_extra_proc_show, NULL);
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}
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static const struct file_operations meminfo_extra_proc_fops = {
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.open = meminfo_extra_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init proc_meminfo_extra_init(void)
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{
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proc_create("meminfo_extra", 0444, NULL, &meminfo_extra_proc_fops);
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return 0;
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}
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fs_initcall(proc_meminfo_extra_init);
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