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In order to make arch_vma_name() work from inside install_special_mapping() we need to set the context.vdso before calling it. ( This is needed for performance counters to be able to track this special executable area. ) Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>