diff options
author | Kumar Gala <galak@kernel.crashing.org> | 2008-12-13 17:01:37 -0600 |
---|---|---|
committer | Kumar Gala <galak@kernel.crashing.org> | 2008-12-13 17:02:47 -0600 |
commit | e5e774d8833de1a0037be2384efccadf16935675 (patch) | |
tree | faab96f099076670dd73eb85b19d532b0fd2efa6 /drivers/net/wireless/iwlwifi/iwl-3945-io.h | |
parent | ab44f4627e2160cddbddbe8aa8b1d2b2e1559790 (diff) | |
download | blackbird-op-linux-e5e774d8833de1a0037be2384efccadf16935675.tar.gz blackbird-op-linux-e5e774d8833de1a0037be2384efccadf16935675.zip |
powerpc/fsl-booke: Fix problem with _tlbil_va being interrupted
An example calling sequence which we did see:
copy_user_highpage -> kmap_atomic -> flush_tlb_page -> _tlbil_va
We got interrupted after setting up the MAS registers before the
tlbwe and the interrupt handler that caused the interrupt also did
a kmap_atomic (ide code) and thus on returning from the interrupt
the MAS registers no longer contained the proper values.
Since we dont save/restore MAS registers for normal interrupts we
need to disable interrupts in _tlbil_va to ensure atomicity.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-3945-io.h')
0 files changed, 0 insertions, 0 deletions