linux-kernel - [PATCH 02/12] blk: use for_each

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Message-Id: <20180709083650.23549-2-daniel.vetter@ffwll.ch>
Date:   Mon,  9 Jul 2018 10:36:40 +0200
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     DRI Development <dri-devel@...ts.freedesktop.org>,
        Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Shaohua Li <shli@...com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 02/12] blk: use for_each_if

Makes the macros resilient against if {} else {} blocks right
afterwards.

Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Cc: Tejun Heo <tj@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Shaohua Li <shli@...com>
Cc: Kate Stewart <kstewart@...uxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Joseph Qi <joseph.qi@...ux.alibaba.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Arnd Bergmann <arnd@...db.de>
---
 include/linux/blk-cgroup.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 6c666fd7de3c..f1c3afe42c26 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -382,7 +382,7 @@ static inline void blkg_put(struct blkcg_gq *blkg)
  */
 #define blkg_for_each_descendant_pre(d_blkg, pos_css, p_blkg)		\
 	css_for_each_descendant_pre((pos_css), &(p_blkg)->blkcg->css)	\
-		if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css),	\
+		for_each_if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css), \
 					      (p_blkg)->q, false)))
 
 /**
@@ -397,7 +397,7 @@ static inline void blkg_put(struct blkcg_gq *blkg)
  */
 #define blkg_for_each_descendant_post(d_blkg, pos_css, p_blkg)		\
 	css_for_each_descendant_post((pos_css), &(p_blkg)->blkcg->css)	\
-		if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css),	\
+		for_each_if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css), \
 					      (p_blkg)->q, false)))
 
 /**
-- 
2.18.0