tree ade46df79306ba0c5bea3449fe9a8ef66d25129b
parent 5f75a4f887a35b99878fc07ed749a90375194b63
author Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> 1162274827 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1162310819 -0800

[PATCH] uml ubd driver: change ubd_lock to be a mutex

This lock protects ubd setup and teardown, so is only used in process context;
beyond that, during such setup memory allocations must be performed and some
generic functions which can sleep must be called (such as add_disk()).  So the
only correct solution is to make it a mutex instead of a spin_lock.  No other
change is done - this lock must be acquired in different places but it's done
afterwards.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>