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um: Fix hung task in fix_range_common()

If do_ops() fails we have to release current->mm->mmap_sem
otherwise the failing task will never terminate.

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Richard Weinberger <richard@nod.at>

Richard Weinberger Richard Weinberger 2014-07-20

changed arch/um/kernel/tlb.c
arch/um/kernel/tlb.c Diff Switch to side-by-side view
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