If you want to dump an u32 array in debugfs, you can create file with::
+ struct debugfs_u32_array {
+ u32 *array;
+ u32 n_elements;
+ };
+
void debugfs_create_u32_array(const char *name, umode_t mode,
struct dentry *parent,
- u32 *array, u32 elements);
+ struct debugfs_u32_array *array);
-The "array" argument provides data, and the "elements" argument is
-the number of elements in the array. Note: Once array is created its
-size can not be changed.
+The "array" argument wraps a pointer to the array's data and the number
+of its elements. Note: Once array is created its size can not be changed.
There is a helper function to create device related seq_file::
}
EXPORT_SYMBOL_GPL(debugfs_create_blob);
-struct array_data {
- void *array;
- u32 elements;
-};
-
static size_t u32_format_array(char *buf, size_t bufsize,
u32 *array, int array_size)
{
static int u32_array_open(struct inode *inode, struct file *file)
{
- struct array_data *data = inode->i_private;
- int size, elements = data->elements;
+ struct debugfs_u32_array *data = inode->i_private;
+ int size, elements = data->n_elements;
char *buf;
/*
buf[size] = 0;
file->private_data = buf;
- u32_format_array(buf, size, data->array, data->elements);
+ u32_format_array(buf, size, data->array, data->n_elements);
return nonseekable_open(inode, file);
}
* @parent: a pointer to the parent dentry for this file. This should be a
* directory dentry if set. If this parameter is %NULL, then the
* file will be created in the root of the debugfs filesystem.
- * @array: u32 array that provides data.
- * @elements: total number of elements in the array.
+ * @array: wrapper struct containing data pointer and size of the array.
*
* This function creates a file in debugfs with the given name that exports
* @array as data. If the @mode variable is so set it can be read from.
* Once array is created its size can not be changed.
*/
void debugfs_create_u32_array(const char *name, umode_t mode,
- struct dentry *parent, u32 *array, u32 elements)
+ struct dentry *parent,
+ struct debugfs_u32_array *array)
{
- struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL);
-
- if (data == NULL)
- return;
-
- data->array = array;
- data->elements = elements;
-
- debugfs_create_file_unsafe(name, mode, parent, data, &u32_array_fops);
+ debugfs_create_file_unsafe(name, mode, parent, array, &u32_array_fops);
}
EXPORT_SYMBOL_GPL(debugfs_create_u32_array);
struct device *dev; /* Optional device for Runtime PM */
};
+struct debugfs_u32_array {
+ u32 *array;
+ u32 n_elements;
+};
+
extern struct dentry *arch_debugfs_dir;
#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
int nregs, void __iomem *base, char *prefix);
void debugfs_create_u32_array(const char *name, umode_t mode,
- struct dentry *parent, u32 *array, u32 elements);
+ struct dentry *parent,
+ struct debugfs_u32_array *array);
struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
struct dentry *parent,
}
static inline void debugfs_create_u32_array(const char *name, umode_t mode,
- struct dentry *parent, u32 *array,
- u32 elements)
+ struct dentry *parent,
+ struct debugfs_u32_array *array)
{
}
#ifndef __MM_CMA_H__
#define __MM_CMA_H__
+#include <linux/debugfs.h>
+
struct cma {
unsigned long base_pfn;
unsigned long count;
#ifdef CONFIG_CMA_DEBUGFS
struct hlist_head mem_head;
spinlock_t mem_head_lock;
+ struct debugfs_u32_array dfs_bitmap;
#endif
const char *name;
};
{
struct dentry *tmp;
char name[16];
- int u32s;
scnprintf(name, sizeof(name), "cma-%s", cma->name);
debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);
debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);
- u32s = DIV_ROUND_UP(cma_bitmap_maxno(cma), BITS_PER_BYTE * sizeof(u32));
- debugfs_create_u32_array("bitmap", 0444, tmp, (u32 *)cma->bitmap, u32s);
+ cma->dfs_bitmap.array = (u32 *)cma->bitmap;
+ cma->dfs_bitmap.n_elements = DIV_ROUND_UP(cma_bitmap_maxno(cma),
+ BITS_PER_BYTE * sizeof(u32));
+ debugfs_create_u32_array("bitmap", 0444, tmp, &cma->dfs_bitmap);
}
static int __init cma_debugfs_init(void)