From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 36F0DB70FD for ; Thu, 11 Jun 2009 00:39:23 +1000 (EST) From: Geert Uytterhoeven To: Benjamin Herrenschmidt Subject: [PATCH 05/33] block: Add bio_list_peek() Date: Wed, 10 Jun 2009 16:38:40 +0200 Message-Id: <1244644748-24211-6-git-send-email-Geert.Uytterhoeven@sonycom.com> In-Reply-To: <1244644748-24211-5-git-send-email-Geert.Uytterhoeven@sonycom.com> References: <1244644748-24211-1-git-send-email-Geert.Uytterhoeven@sonycom.com> <1244644748-24211-2-git-send-email-Geert.Uytterhoeven@sonycom.com> <1244644748-24211-3-git-send-email-Geert.Uytterhoeven@sonycom.com> <1244644748-24211-4-git-send-email-Geert.Uytterhoeven@sonycom.com> <1244644748-24211-5-git-send-email-Geert.Uytterhoeven@sonycom.com> Sender: Geert Uytterhoeven Cc: Geert Uytterhoeven , linuxppc-dev@ozlabs.org, Jens Axboe , cbe-oss-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Introduce bio_list_peek(), to obtain a pointer to the first bio on the bio_list without actually removing it from the list. This is needed when you want to serialize based on the list being empty or not. Signed-off-by: Geert Uytterhoeven Cc: Jens Axboe --- include/linux/bio.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/include/linux/bio.h b/include/linux/bio.h index 7b214fd..618bb7d 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -590,6 +590,11 @@ static inline void bio_list_merge_head(struct bio_list *bl, bl->head = bl2->head; } +static inline struct bio *bio_list_peek(struct bio_list *bl) +{ + return bl->head; +} + static inline struct bio *bio_list_pop(struct bio_list *bl) { struct bio *bio = bl->head; -- 1.6.2.4