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| author | Kumar Gala <[email protected]> | 2008-12-13 23:01:37 +0000 |
|---|---|---|
| committer | Kumar Gala <[email protected]> | 2008-12-13 23:02:47 +0000 |
| commit | e5e774d8833de1a0037be2384efccadf16935675 (patch) | |
| tree | faab96f099076670dd73eb85b19d532b0fd2efa6 /net/unix/af_unix.c | |
| parent | Merge branch 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/galak/pow... (diff) | |
| download | kernel-e5e774d8833de1a0037be2384efccadf16935675.tar.gz kernel-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 <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions