From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: [PATCH 1/3] ide: Add ide_get_paired_drive() helper Date: Thu, 18 Oct 2007 10:56:19 +1000 Message-ID: <20071018005621.8F637DDEB8@ozlabs.org> References: <1192668978.21882.719539599813.qpush@grosgo> Return-path: Received: from ozlabs.org ([203.10.76.45]:36523 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759618AbXJRA4W (ORCPT ); Wed, 17 Oct 2007 20:56:22 -0400 In-Reply-To: <1192668978.21882.719539599813.qpush@grosgo> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Bartlomiej Zolnierkiewicz Cc: Linux IDE , linux-kernel@vger.kernel.org, Andrew Morton This adds a helper to get to the "other" drive on a pair connected to a given hwif. Signed-off-by: Benjamin Herrenschmidt --- 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 */