On 12/7/21 1:27 pm, Christoph Hellwig wrote:
On Sat, Jul 10, 2021 at 09:16:38PM +0800, Hillf Danton wrote:
To break the lock chain, un/register blkdev without mtd_table_mutex held.
Yes, Desmond Cheong Zhi Xi sent pretty much the same patch on June 18th
(mtd: break circular locks in register_mtd_blktrans), but it did not get
picked up.
I believe Miquèl was waiting for -rc1 to apply it.
But taking a closer look, although the fix for the register path is the
same, Hillf Danton's proposed patch additionally avoids inverting the
lock hierarchy on the unregister path. So I believe this new patch
should be more robust.
Best wishes,
Desmond
