memblock: Add debugfs files to dump the arrays content (6d03b885) · Commits · e / devices / android_kernel_teracube_emerald

mm/memblock.c

+51 −0

Original line number	Original line	Diff line number	Diff line
	@@ -16,6 +16,8 @@
	#include <linux/bitops.h>		#include <linux/bitops.h>
	#include <linux/poison.h>		#include <linux/poison.h>
	#include <linux/pfn.h>		#include <linux/pfn.h>
			#include <linux/debugfs.h>
			#include <linux/seq_file.h>
	#include <linux/memblock.h>		#include <linux/memblock.h>

	struct memblock memblock;		struct memblock memblock;
	@@ -740,3 +742,52 @@ static int __init early_memblock(char *p)
	}		}
	early_param("memblock", early_memblock);		early_param("memblock", early_memblock);

			#ifdef CONFIG_DEBUG_FS

			static int memblock_debug_show(struct seq_file m, void private)
			{
			struct memblock_type *type = m->private;
			struct memblock_region *reg;
			int i;

			for (i = 0; i < type->cnt; i++) {
			reg = &type->regions[i];
			seq_printf(m, "%4d: ", i);
			if (sizeof(phys_addr_t) == 4)
			seq_printf(m, "0x%08lx..0x%08lx\n",
			(unsigned long)reg->base,
			(unsigned long)(reg->base + reg->size - 1));
			else
			seq_printf(m, "0x%016llx..0x%016llx\n",
			(unsigned long long)reg->base,
			(unsigned long long)(reg->base + reg->size - 1));

			}
			return 0;
			}

			static int memblock_debug_open(struct inode inode, struct file file)
			{
			return single_open(file, memblock_debug_show, inode->i_private);
			}

			static const struct file_operations memblock_debug_fops = {
			.open = memblock_debug_open,
			.read = seq_read,
			.llseek = seq_lseek,
			.release = single_release,
			};

			static int __init memblock_init_debugfs(void)
			{
			struct dentry *root = debugfs_create_dir("memblock", NULL);
			if (!root)
			return -ENXIO;
			debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops);
			debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops);

			return 0;
			}
			__initcall(memblock_init_debugfs);

			#endif /* CONFIG_DEBUG_FS */