kernel_samsung_a34x-permissive/mm/showmem_extra.c

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