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Message-Id: <20071018005621.8F637DDEB8@ozlabs.org> Date: Thu, 18 Oct 2007 10:56:19 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com> CC: Linux IDE <linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org> Subject: [PATCH 1/3] ide: Add ide_get_paired_drive() helper This adds a helper to get to the "other" drive on a pair connected to a given hwif. Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org> --- Note: You may want to use the 1 - select.b.unit construct instead, as you prefer, I just used what was there and fixed it. include/linux/ide.h | 7 +++++++ 1 file changed, 7 insertions(+) Index: linux-work/include/linux/ide.h =================================================================== --- linux-work.orig/include/linux/ide.h 2007-10-18 10:41:42.000000000 +1000 +++ linux-work/include/linux/ide.h 2007-10-18 10:42:40.000000000 +1000 @@ -1454,4 +1454,11 @@ static inline int hwif_to_node(ide_hwif_ return dev ? pcibus_to_node(dev->bus) : -1; } +static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + + return &hwif->drives[(drive->dn ^ 1) & 1]; +} + #endif /* _IDE_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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