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UBI: use bit-fields

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Save 12 bytes of RAM per volume by using bit-fields instead of integers.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2008-01-16 14:24:14 +02:00
parent ae616e1be1
commit 896c0c06aa
2 changed files with 9 additions and 19 deletions
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16
drivers/mtd/ubi/ubi.h
View File

@ -144,7 +144,6 @@ struct ubi_volume_desc;
* @readers: number of users holding this volume in read-only mode
* @writers: number of users holding this volume in read-write mode
* @exclusive: whether somebody holds this volume in exclusive mode
* @checked: if this static volume was checked
*
* @reserved_pebs: how many physical eraseblocks are reserved for this volume
* @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
@ -152,21 +151,22 @@ struct ubi_volume_desc;
* @used_ebs: how many logical eraseblocks in this volume contain data
* @last_eb_bytes: how many bytes are stored in the last logical eraseblock
* @used_bytes: how many bytes of data this volume contains
* @upd_marker: non-zero if the update marker is set for this volume
* @corrupted: non-zero if the volume is corrupted (static volumes only)
* @alignment: volume alignment
* @data_pad: how many bytes are not used at the end of physical eraseblocks to
* satisfy the requested alignment
* @name_len: volume name length
* @name: volume name
*
* @updating: whether the volume is being updated
* @upd_ebs: how many eraseblocks are expected to be updated
* @upd_bytes: how many bytes are expected to be received
* @upd_received: how many update bytes were already received
* @upd_buf: update buffer which is used to collect update data
*
* @eba_tbl: EBA table of this volume (LEB->PEB mapping)
* @checked: %1 if this static volume was checked
* @corrupted: %1 if the volume is corrupted (static volumes only)
* @upd_marker: %1 if the update marker is set for this volume
* @updating: %1 if the volume is being updated
*
* @gluebi_desc: gluebi UBI volume descriptor
* @gluebi_refcount: reference count of the gluebi MTD device
@ -189,7 +189,6 @@ struct ubi_volume {
int readers;
int writers;
int exclusive;
int checked;
int reserved_pebs;
int vol_type;
@ -197,20 +196,21 @@ struct ubi_volume {
int used_ebs;
int last_eb_bytes;
long long used_bytes;
int upd_marker;
int corrupted;
int alignment;
int data_pad;
int name_len;
char name[UBI_VOL_NAME_MAX+1];
int updating;
int upd_ebs;
long long upd_bytes;
long long upd_received;
void *upd_buf;
int *eba_tbl;
int checked:1;
int corrupted:1;
int upd_marker:1;
int updating:1;
#ifdef CONFIG_MTD_UBI_GLUEBI
/* Gluebi-related stuff may be compiled out */

12
drivers/mtd/ubi/vmt.c
View File

@ -526,7 +526,6 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
}
spin_unlock(&ubi->volumes_lock);
/* Reserve physical eraseblocks */
pebs = reserved_pebs - vol->reserved_pebs;
if (pebs > 0) {
@ -746,11 +745,6 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
goto fail;
}
if (vol->upd_marker != 0 && vol->upd_marker != 1) {
ubi_err("bad upd_marker");
goto fail;
}
if (vol->upd_marker && vol->corrupted) {
dbg_err("update marker and corrupted simultaneously");
goto fail;
@ -785,7 +779,7 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
n = (long long)vol->used_ebs * vol->usable_leb_size;
if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
if (vol->corrupted != 0) {
if (vol->corrupted) {
ubi_err("corrupted dynamic volume");
goto fail;
}
@ -802,10 +796,6 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
goto fail;
}
} else {
if (vol->corrupted != 0 && vol->corrupted != 1) {
ubi_err("bad corrupted");
goto fail;
}
if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
ubi_err("bad used_ebs");
goto fail;