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disk: part_dos: Align dos_partition_t with struct partition

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The dos_partition_t struct defined in part_dos.h is nearly identical to
the struct partition defined in part_efi.h. They differ primarily in how
define their starting sector and number of sectors fields.

The former uses unsigned char arrays while the latter uses __le32 types.
Using __le32 is preferable, as it removes the ambiguity and potential
misuse of a raw byte array. This also aligns the structure with how the
Linux kernel defines it nowadays, which is the original source of it.

To prepare for future consolidation where one of the data structures can
be removed, this change aligns both definitions and updates all accessors
for dos_partition_t.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Javier Martinez Canillas
2026-02-12 21:44:56 +01:00
committed by Heinrich Schuchardt
parent 63d52576e7
commit 1450a4555d
2 changed files with 11 additions and 11 deletions
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6
include/part_dos.h
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@@ -30,8 +30,8 @@ typedef struct dos_partition {
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start4[4]; /* starting sector counting from 0 */
unsigned char size4[4]; /* nr of sectors in partition */
} dos_partition_t;
__le32 start_sect; /* starting sector counting from 0 */
__le32 nr_sects; /* nr of sectors in partition */
} __packed dos_partition_t;
#endif /* _DISK_PART_DOS_H */