drbd: Replaced md_io_mutex by an atomic: md_io_in_use
authorPhilipp Reisner <philipp.reisner@linbit.com>
Mon, 27 Jun 2011 09:51:46 +0000 (11:51 +0200)
committerPhilipp Reisner <philipp.reisner@linbit.com>
Wed, 9 May 2012 08:22:31 +0000 (10:22 +0200)
The new function drbd_md_get_buffer() aborts waiting for the buffer
in case the disk failes in the meantime.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

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