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[PATCH] bcm43xx: optimization of DMA bitfields 

Convert the bitfields in the bcm43xx DMA code to properly
aligned u8 booleans. These flags are accessed in the DMA
hotpath, so it's a good idea to waste a few bytes of memory
for the sake of speed by not requiring masking (and probably
shifting) of the bitfields.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-Off-By: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2006-08-16 11:05:16 -05:00 committed by John W. Linville
parent 9c974fb1a4
commit 80b60fa848
1 changed files with 6 additions and 3 deletions
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9
drivers/net/wireless/bcm43xx/bcm43xx_dma.h
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@ -235,9 +235,12 @@ struct bcm43xx_dmaring {
u16 mmio_base;
/* DMA controller index number (0-5). */
int index;
u8 tx:1, /* TRUE, if this is a TX ring. */
dma64:1, /* TRUE, if 64-bit DMA is enabled (FALSE if 32bit). */
suspended:1; /* TRUE, if transfers are suspended on this ring. */
/* Boolean. Is this a TX ring? */
u8 tx;
/* Boolean. 64bit DMA if true, 32bit DMA otherwise. */
u8 dma64;
/* Boolean. Are transfers suspended on this ring? */
u8 suspended;
struct bcm43xx_private *bcm;
#ifdef CONFIG_BCM43XX_DEBUG
/* Maximum number of used slots. */