linux-kernel - [PATCH 2/2] anondev: switch to IDA

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Message-ID: <20080828022623.GB18499@x200.localdomain>
Date:	Thu, 28 Aug 2008 06:26:23 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...l.org, viro@...iv.linux.org.uk
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] anondev: switch to IDA

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/super.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/fs/super.c
+++ b/fs/super.c
@@ -682,7 +682,7 @@ void emergency_remount(void)
  * filesystems which don't use real block-devices.  -- jrs
  */
 
-static DEFINE_IDR(unnamed_dev_idr);
+static DEFINE_IDA(unnamed_dev_ida);
 static DEFINE_SPINLOCK(unnamed_dev_lock);/* protects the above */
 
 int set_anon_super(struct super_block *s, void *data)
@@ -691,10 +691,10 @@ int set_anon_super(struct super_block *s, void *data)
 	int error;
 
  retry:
-	if (idr_pre_get(&unnamed_dev_idr, GFP_ATOMIC) == 0)
+	if (ida_pre_get(&unnamed_dev_ida, GFP_ATOMIC) == 0)
 		return -ENOMEM;
 	spin_lock(&unnamed_dev_lock);
-	error = idr_get_new(&unnamed_dev_idr, NULL, &dev);
+	error = ida_get_new(&unnamed_dev_ida, &dev);
 	spin_unlock(&unnamed_dev_lock);
 	if (error == -EAGAIN)
 		/* We raced and lost with another CPU. */
@@ -704,7 +704,7 @@ int set_anon_super(struct super_block *s, void *data)
 
 	if ((dev & MAX_ID_MASK) == (1 << MINORBITS)) {
 		spin_lock(&unnamed_dev_lock);
-		idr_remove(&unnamed_dev_idr, dev);
+		ida_remove(&unnamed_dev_ida, dev);
 		spin_unlock(&unnamed_dev_lock);
 		return -EMFILE;
 	}
@@ -720,7 +720,7 @@ void kill_anon_super(struct super_block *sb)
 
 	generic_shutdown_super(sb);
 	spin_lock(&unnamed_dev_lock);
-	idr_remove(&unnamed_dev_idr, slot);
+	ida_remove(&unnamed_dev_ida, slot);
 	spin_unlock(&unnamed_dev_lock);
 }
 

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