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part/dev_desc: Add log2 of blocksize to block_dev_desc data struct

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log2 of the device block size serves as the shift value used to calculate
the block number to read in file systems when implementing avaiable block
sizes.
It is needed quite often in file systems thus it is pre-calculated and
stored in the block device descriptor.

Signed-off-by: Egbert Eich <eich@suse.com>
This commit is contained in:
Egbert Eich 2013-04-09 21:11:56 +00:00 • committed by Tom Rini
parent bc8d98713f
commit 0472fbfd32
9 changed files with 21 additions and 0 deletions
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4
common/cmd_scsi.c
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@ -106,6 +106,8 @@ void scsi_scan(int mode)
scsi_dev_desc[i].lun=0xff;
scsi_dev_desc[i].lba=0;
scsi_dev_desc[i].blksz=0;
scsi_dev_desc[i].log2blksz =
LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));
scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
scsi_dev_desc[i].vendor[0]=0;
scsi_dev_desc[i].product[0]=0;
@ -166,6 +168,8 @@ void scsi_scan(int mode)
}
scsi_dev_desc[scsi_max_devs].lba=capacity;
scsi_dev_desc[scsi_max_devs].blksz=blksz;
scsi_dev_desc[scsi_max_devs].log2blksz =
LOG2(scsi_dev_desc[scsi_max_devs].blksz);
scsi_dev_desc[scsi_max_devs].type=perq;
init_part(&scsi_dev_desc[scsi_max_devs]);
removable: