[PATCH] uml: avoid fixing faults while atomic
commitfea03cb40a15e3c6647c0927300202e062e6792a
authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Fri, 23 Sep 2005 04:44:20 +0000 (22 21:44 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Fri, 23 Sep 2005 05:17:36 +0000 (22 22:17 -0700)
tree2e7933807e29b7d62dd9104c4bc3e640c703ab83
parent12ebcd73e40e09f0dfddf89e465cc0541e0ff8b1
[PATCH] uml: avoid fixing faults while atomic

Following i386, we should maybe refuse trying to fault in pages when we're
doing atomic operations, because to handle the fault we could need to take
already taken spinlocks.

Also, if we're doing an atomic operation (in the sense of in_atomic()) we're
surely in kernel mode and we're surely going to handle adequately the failed
fault, so it's safe to behave this way.

Currently, on UML SMP is rarely used, and we don't support PREEMPT, so this is
unlikely to create problems right now, but it might in the future.

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>
arch/um/kernel/trap_kern.c