include/linux/mtd/concat.h

Source file repositories/reference/linux-study-clean/include/linux/mtd/concat.h

File Facts

System
Linux kernel
Corpus path
include/linux/mtd/concat.h
Extension
.h
Size
2450 bytes
Lines
82
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mtd_concat {
	struct mtd_info mtd;
	int num_subdev;
	struct mtd_info *subdev[];
};

struct mtd_info *mtd_concat_create(
    struct mtd_info *subdev[],  /* subdevices to concatenate */
    int num_devs,               /* number of subdevices      */
    const char *name);          /* name for the new device   */

void mtd_concat_destroy(struct mtd_info *mtd);

/**
 * mtd_virt_concat_node_create - Create a component for concatenation
 *
 * Returns a positive number representing the no. of devices found for
 * concatenation, or a negative error code.
 *
 * List all the devices for concatenations found in DT and create a
 * component for concatenation.
 */
int mtd_virt_concat_node_create(void);

/**
 * mtd_virt_concat_add - add mtd_info object to the list of subdevices for concatenation
 * @mtd: pointer to new MTD device info structure
 *
 * Returns true if the mtd_info object is added successfully else returns false.
 *
 * The mtd_info object is added to the list of subdevices for concatenation.
 * It returns true if a match is found, and false if all subdevices have
 * already been added or if the mtd_info object does not match any of the
 * intended MTD devices.
 */
bool mtd_virt_concat_add(struct mtd_info *mtd);

/**
 * mtd_virt_concat_create_join - Create and register the concatenated MTD device
 *
 * Returns 0 on succes, or a negative error code.
 *
 * Creates and registers the concatenated MTD device
 */
int mtd_virt_concat_create_join(void);

/**
 * mtd_virt_concat_destroy - Remove the concat that includes a specific mtd device
 *                           as one of its components.
 * @mtd: pointer to MTD device info structure.
 *
 * Returns 0 on succes, or a negative error code.
 *
 * If the mtd_info object is part of a concatenated device, all other MTD devices
 * within that concat are registered individually. The concatenated device is then
 * removed, along with its concatenation component.
 *
 */
int mtd_virt_concat_destroy(struct mtd_info *mtd);

void mtd_virt_concat_destroy_joins(void);
void mtd_virt_concat_destroy_items(void);

#endif

Annotation

Implementation Notes