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part: Export part_driver_lookup_type for external use

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Make part_driver_lookup_type non-static so it can be used outside
part.c. This allows external callers to determine the appropriate
partition driver for a block device, enabling more flexible handling of
partition types.

Add a prototype and kernel-doc comment in part.h to document the
function contract. Provide a stub inline implementation returning NULL
when partition support is disabled, ensuring build consistency across
configurations.

Signed-off-by: Javier Tia <javier.tia@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Javier Tia
2025-10-09 07:17:46 -06:00
committed by Ilias Apalodimas
parent 4e4a9de31d
commit 28c341ca07
2 changed files with 22 additions and 17 deletions
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18
disk/part.c
View File

@@ -47,23 +47,7 @@ static struct part_driver *part_driver_get_type(int part_type)
return NULL;
}
/**
* part_driver_lookup_type() - Look up the partition driver for a blk device
*
* If @desc->part_type is PART_TYPE_UNKNOWN, this checks each parition driver
* against the blk device to see if there is a valid partition table acceptable
* to that driver.
*
* If @desc->part_type is already set, it just returns the driver for that
* type, without testing if the driver can find a valid partition on the
* descriptor.
*
* On success it updates @desc->part_type if set to PART_TYPE_UNKNOWN on entry
*
* @dev_desc: Device descriptor
* Return: Driver found, or NULL if none
*/
static struct part_driver *part_driver_lookup_type(struct blk_desc *desc)
struct part_driver *part_driver_lookup_type(struct blk_desc *desc)
{
struct part_driver *drv =
ll_entry_start(struct part_driver, part_driver);

21
include/part.h
View File

@@ -727,6 +727,24 @@ int part_get_type_by_name(const char *name);
*/
int part_get_bootable(struct blk_desc *desc);
/**
* part_driver_lookup_type() - Look up the partition driver for a blk device
*
* If @desc->part_type is PART_TYPE_UNKNOWN, this checks each partition driver
* against the blk device to see if there is a valid partition table acceptable
* to that driver.
*
* If @desc->part_type is already set, it just returns the driver for that
* type, without testing if the driver can find a valid partition on the
* descriptor.
*
* On success it updates @desc->part_type if set to PART_TYPE_UNKNOWN on entry
*
* @desc: Device descriptor
* Return: Driver found, or NULL if none
*/
struct part_driver *part_driver_lookup_type(struct blk_desc *desc);
#else
static inline int part_driver_get_count(void)
{ return 0; }
@@ -737,6 +755,9 @@ static inline struct part_driver *part_driver_get_first(void)
static inline bool part_get_bootable(struct blk_desc *desc)
{ return false; }
static inline struct part_driver *part_driver_lookup_type(struct blk_desc *desc)
{ return NULL; }
#endif /* CONFIG_PARTITIONS */
#endif /* _PART_H */