Hugh Dickins 266d4f4037 [PATCH] suspend regression: sysfs deadlock ... Suspend deadlocks when trying to unregister /sys/block/sr0. This comes from Oliver's commit 94bebf4d1b "Driver core: fix race in sysfs between sysfs_remove_file() and read()/write()". sysfs_write_file downs buffer->sem while calling flush_write_buffer, and flushing that particular write buffer entails downing buffer->sem in orphan_all_buffers, resulting in the obvious self-deadlock. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-03-06 17:59:14 -08:00
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