[PATCH 05/17] Update the md driver to use idr helper functions.

[Lee Duncan]

Signed-off-by: Lee Duncan <ldun...@suse.com>
---
 drivers/md/dm.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f331d888e7f5..53d6895eb13d 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2202,9 +2202,7 @@ static int dm_any_congested(void *congested_data, int 
bdi_bits)
  *---------------------------------------------------------------*/
 static void free_minor(int minor)
 {
-       spin_lock(&_minor_lock);
-       idr_remove(&_minor_idr, minor);
-       spin_unlock(&_minor_lock);
+       idr_put_index(&_minor_idr, &_minor_lock, minor);
 }
 
 /*
@@ -2217,13 +2215,8 @@ static int specific_minor(int minor)
        if (minor >= (1 << MINORBITS))
                return -EINVAL;
 
-       idr_preload(GFP_KERNEL);
-       spin_lock(&_minor_lock);
-
-       r = idr_alloc(&_minor_idr, MINOR_ALLOCED, minor, minor + 1, GFP_NOWAIT);
-
-       spin_unlock(&_minor_lock);
-       idr_preload_end();
+       r = idr_get_index_in_range(&_minor_idr, &_minor_lock, MINOR_ALLOCED,
+                                  minor, minor + 1);
        if (r < 0)
                return r == -ENOSPC ? -EBUSY : r;
        return 0;
@@ -2233,13 +2226,8 @@ static int next_free_minor(int *minor)
 {
        int r;
 
-       idr_preload(GFP_KERNEL);
-       spin_lock(&_minor_lock);
-
-       r = idr_alloc(&_minor_idr, MINOR_ALLOCED, 0, 1 << MINORBITS, 
GFP_NOWAIT);
-
-       spin_unlock(&_minor_lock);
-       idr_preload_end();
+       r = idr_get_index_in_range(&_minor_idr, &_minor_lock, MINOR_ALLOCED,
+                                  0, 1 << MINORBITS);
        if (r < 0)
                return r;
        *minor = r;
-- 
2.1.4

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