On 2014-11-01 16:28, Ben Hutchings wrote:
3.2.64-rc1 review patch. If anyone has any objections, please let me know.
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From: Keith Busch <keith.busch@xxxxxxxxx>
commit 2da78092dda13f1efd26edbbf99a567776913750 upstream.
Releases the dev_t minor when all references are closed to prevent
another device from acquiring the same major/minor.
Since the partition's release may be invoked from call_rcu's soft-irq
context, the ext_dev_idr's mutex had to be replaced with a spinlock so
as not so sleep.
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
[bwh: Backported to 3.2:
- Adjust filename
- idr insertion API is different, and blk_alloc_devt() is preallocating
a node in a different way]
As I've noted for pretty much every stable branch so far, you have to
backport commit 46f341ffcfb5 as well, if you backport this one.
--
Jens Axboe
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