[PATCH] uml: Fix handling of failed execs of helpers
There were some bugs in handling failures to exec helper programs. errno was passed back from the child with the wrong sign. It was also ignored. In the case where it mattered, the errno from the (successful) read in the parent was used instead. Signed-off-by: NJeff Dike <jdike@addtoit.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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