From: Martin Schwidefsky Date: Thu, 26 Jul 2012 06:53:06 +0000 (+0200) Subject: s390/mm: downgrade page table after fork of a 31 bit process X-Git-Tag: v3.6-rc1~34^2~5 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f6f281b731d20bfe75c13f85d33f3f05b440222;p=pandora-kernel.git s390/mm: downgrade page table after fork of a 31 bit process The downgrade of the 4 level page table created by init_new_context is currently done only in start_thread31. If a 31 bit process forks the new mm uses a 4 level page table, including the task size of 2<<42 that goes along with it. This is incorrect as now a 31 bit process can map memory beyond 2GB. Define arch_dup_mmap to do the downgrade after fork. Cc: stable@vger.kernel.org Signed-off-by: Martin Schwidefsky --- Reading git-diff-tree failed