linux-kernel - Re: [ 052/153] idr: idr_for_each

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Message-ID: <1607973.Qpkavuy2AM@quad>
Date:	Mon, 04 Mar 2013 22:05:52 +0100
From:	Philipp Reisner <philipp.reisner@...bit.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	stable@...r.kernel.org, akpm@...ux-foundation.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [ 052/153] idr: idr_for_each_entry() macro

Sure, here it is:
----------

From: Philipp Reisner <philipp.reisner@...bit.com>

commit 9749f30f1a387070e6e8351f35aeb829eacc3ab6 upstream.

Inspired by the list_for_each_entry() macro

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com>
---
 include/linux/idr.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/idr.h b/include/linux/idr.h
index 255491c..52a9da2 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -152,4 +152,15 @@ void ida_simple_remove(struct ida *ida, unsigned int id);
 
 void __init idr_init_cache(void);
 
+/**
+ * idr_for_each_entry - iterate over an idr's elements of a given type
+ * @idp:     idr handle
+ * @entry:   the type * to use as cursor
+ * @id:      id entry's key
+ */
+#define idr_for_each_entry(idp, entry, id)                             \
+       for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \
+            entry != NULL;                                             \
+            ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))
+
 #endif /* __IDR_H__ */

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