arm/mm: Convert to using lock_mm_and_find_vma()
commit 8b35ca3e upstream. arm has an additional check for address < FIRST_USER_ADDRESS before expanding the stack. Since FIRST_USER_ADDRESS is defined everywhere (generally as 0), move that check to the generic expand_downwards(). Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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ac764dee
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