The patch titled
dm: move idr_pre_get
has been added to the -mm tree. Its filename is
dm-move-idr_pre_get.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dm: move idr_pre_get
From: Jeff Mahoney <jeffm@xxxxxxxx>
idr_pre_get() can sleep while allocating memory.
The next patch will change _minor_lock into a spinlock, so this patch moves
idr_pre_get() outside the lock in preparation.
[akpm: too late for 2.6.17 - suitable for 2.6.17.x after it has settled]
Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/dm.c | 23 +++++++++--------------
1 files changed, 9 insertions(+), 14 deletions(-)
diff -puN drivers/md/dm.c~dm-move-idr_pre_get drivers/md/dm.c
--- devel/drivers/md/dm.c~dm-move-idr_pre_get 2006-05-25 15:15:24.000000000 -0700
+++ devel-akpm/drivers/md/dm.c 2006-05-25 15:15:24.000000000 -0700
@@ -766,6 +766,10 @@ static int specific_minor(struct mapped_
if (minor >= (1 << MINORBITS))
return -EINVAL;
+ r = idr_pre_get(&_minor_idr, GFP_KERNEL);
+ if (!r)
+ return -ENOMEM;
+
mutex_lock(&_minor_lock);
if (idr_find(&_minor_idr, minor)) {
@@ -773,16 +777,9 @@ static int specific_minor(struct mapped_
goto out;
}
- r = idr_pre_get(&_minor_idr, GFP_KERNEL);
- if (!r) {
- r = -ENOMEM;
- goto out;
- }
-
r = idr_get_new_above(&_minor_idr, MINOR_ALLOCED, minor, &m);
- if (r) {
+ if (r)
goto out;
- }
if (m != minor) {
idr_remove(&_minor_idr, m);
@@ -800,13 +797,11 @@ static int next_free_minor(struct mapped
int r;
unsigned int m;
- mutex_lock(&_minor_lock);
-
r = idr_pre_get(&_minor_idr, GFP_KERNEL);
- if (!r) {
- r = -ENOMEM;
- goto out;
- }
+ if (!r)
+ return -ENOMEM;
+
+ mutex_lock(&_minor_lock);
r = idr_get_new(&_minor_idr, MINOR_ALLOCED, &m);
if (r) {
_
Patches currently in -mm which might be from jeffm@xxxxxxxx are
lib-add-idr_replace.patch
lib-add-idr_replace-tidy.patch
dm-fix-idr-minor-allocation.patch
dm-move-idr_pre_get.patch
dm-change-minor_lock-to-spinlock.patch
dm-add-dmf_freeing.patch
dm-fix-mapped-device-ref-counting.patch
dm-add-module-ref-counting.patch
dm-fix-block-device-initialisation.patch
-
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