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| author | Martin Schwidefsky <[email protected]> | 2015-03-01 14:56:45 +0000 |
|---|---|---|
| committer | Martin Schwidefsky <[email protected]> | 2015-03-02 19:35:57 +0000 |
| commit | 691d5264158e58004904f285417fefaf8650ffe6 (patch) | |
| tree | 2a225e091af5d5ffb934ee4994db91ae0ad181aa /drivers/net/xen-netback/interface.c | |
| parent | s390/ftrace: fix crashes when switching tracers / add notrace to cpu_relax() (diff) | |
| download | kernel-691d5264158e58004904f285417fefaf8650ffe6.tar.gz kernel-691d5264158e58004904f285417fefaf8650ffe6.zip | |
s390/mm: fix incorrect ASCE after crst_table_downgrade
The switch_mm function does nothing in case the prev and next mm
are the same. It can happen that a crst_table_downgrade has changed
the top-level pgd in the meantime on a different CPU. Always store
the new ASCE to be picked up in entry.S.
[[email protected]]: Bug was introduced with git commit
53e857f30867 ("s390/mm,tlb: race of lazy TLB flush vs. recreation
of TLB entries") and causes random crashes due to broken page tables
being used.
Reported-by: Dominik Vogt <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions