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The bug occurred to me when a UML left an empty ~/.uml/Sarge-norm folder -
when trying to reuse not_dead_yet() failed one of its check. The comment
says that's ok and means that we can take the directory, but while normally
not_dead_yet() removes it and returns 0 (i.e. go on, use this), on failure
it returns 0 but forgets to remove it. The fix is to remove it anytime
we're going to return 0.
But since "not_dead_yet" didn't make the interface so clear, causing this
bug, and I couldn't find a convenient name for the mix of things it did, I
split it into two parts:
is_umdir_used() - returns a boolean, contains all checks of not_dead_yet()
umdir_take_if_dead - tries to remove the dir unless it's used - returns
whether it removed it, that is we now own it.
With this changes the control flow is IMHO a bit clearer and needs less
comment for control flow.
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>
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