diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-26 08:53:06 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-08-10 00:24:54 +0100 |
| commit | f22027d0e8398e377a42a62241137b77a35eda97 (patch) | |
| tree | 691aacb8ce4a0fb9a72e95744c54fb00e2767d59 /lib/debugobjects.c | |
| parent | 60ed9e385606f27c787710bba0dfdb7ff467bdf7 (diff) | |
s390/mm: downgrade page table after fork of a 31 bit process
commit 0f6f281b731d20bfe75c13f85d33f3f05b440222 upstream.
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.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions