xtensa: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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