linux-kernel - [PATCH 09/14] dlm: use idr_for_each_entry() in recover_idr

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Date:	Fri, 25 Jan 2013 17:31:07 -0800
From:	Tejun Heo <tj@...nel.org>
To:	akpm@...ux-foundation.org
Cc:	rusty@...tcorp.com.au, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>,
	Christine Caulfield <ccaulfie@...hat.com>,
	David Teigland <teigland@...hat.com>, cluster-devel@...hat.com
Subject: [PATCH 09/14] dlm: use idr_for_each_entry() in recover_idr_clear() error path

Convert recover_idr_clear() to use idr_for_each_entry() instead of
idr_for_each().  It's somewhat less efficient this way but it
shouldn't matter in an error path.  This is to help with deprecation
of idr_remove_all().

Only compile tested.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Christine Caulfield <ccaulfie@...hat.com>
Cc: David Teigland <teigland@...hat.com>
Cc: cluster-devel@...hat.com
---
This patch depends on an earlier idr patch and I think it would be
best to route these together through -mm.  Christine, David, can you
please ack this?

Thanks.

 fs/dlm/recover.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index aedea28..b2856e7 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -351,23 +351,20 @@ static struct dlm_rsb *recover_idr_find(struct dlm_ls *ls, uint64_t id)
 	return r;
 }
 
-static int recover_idr_clear_rsb(int id, void *p, void *data)
+static void recover_idr_clear(struct dlm_ls *ls)
 {
-	struct dlm_ls *ls = data;
-	struct dlm_rsb *r = p;
+	struct dlm_rsb *r;
+	int id;
 
-	r->res_id = 0;
-	r->res_recover_locks_count = 0;
-	ls->ls_recover_list_count--;
+	spin_lock(&ls->ls_recover_idr_lock);
 
-	dlm_put_rsb(r);
-	return 0;
-}
+	idr_for_each_entry(&ls->ls_recover_idr, r, id) {
+		r->res_id = 0;
+		r->res_recover_locks_count = 0;
+		ls->ls_recover_list_count--;
 
-static void recover_idr_clear(struct dlm_ls *ls)
-{
-	spin_lock(&ls->ls_recover_idr_lock);
-	idr_for_each(&ls->ls_recover_idr, recover_idr_clear_rsb, ls);
+		dlm_put_rsb(r);
+	}
 	idr_remove_all(&ls->ls_recover_idr);
 
 	if (ls->ls_recover_list_count != 0) {
-- 
1.8.1

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