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ide: dynamic allocation of device structures

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Allocate device structures dynamically instead of having them embedded
in ide_hwif_t:

* Remove needless zeroing of port structure from ide_init_port_data().

* Add ide_hwif_t.devices[MAX_DRIVES] (table of pointers to the devices).

* Add ide_port_{alloc,free}_devices() helpers and use them respectively
  in ide_{host,free}_alloc().

* Convert all users of ->drives[] to use ->devices[] instead.

While at it:

* Use drive->dn for the slave device check in scc_pata.c.

As a nice side-effect this patch cuts ~1kB (x86-32) from the resulting
code size:

   text    data     bss     dec     hex filename
  53963    1244     237   55444    d894 drivers/ide/ide-core.o.before
  52981    1244     237   54462    d4be drivers/ide/ide-core.o.after

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2009-01-06 17:20:56 +01:00
parent a32296f938
commit 5e7f3a4669
7 changed files with 65 additions and 33 deletions
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2
drivers/ide/ide.c
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@@ -497,7 +497,7 @@ void ide_port_apply_params(ide_hwif_t *hwif)
}
for (i = 0; i < MAX_DRIVES; i++)
ide_dev_apply_params(&hwif->drives[i], i);
ide_dev_apply_params(hwif->devices[i], i);
}
/*