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The cris v32 switch_mm guards get_mmu_context with next->page_table_lock: good it's not really SMP yet, since get_mmu_context messes with global variables affecting other mms. Replace by global mmu_context_lock. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>