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ea3f827287
In commit8d7071af89("mm: always expand the stack with the mmap write lock held") I tried to deal with the remaining odd page fault handling cases. The oddest one is ia64, which has stacks that grow both up and down. And because ia64 was _so_ odd, I asked people to verify the end result. But a close second oddity is parisc, which is the only one that has a main stack growing up (our "CONFIG_STACK_GROWSUP" config option). But it looked obvious enough that I didn't worry about it. I should have worried a bit more. Not because it was particularly complex, but because I just used the wrong variable name. The previous vma isn't called "prev", it's called "prev_vma". Blush. Fixes:8d7071af89("mm: always expand the stack with the mmap write lock held") Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>