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authorKumar Gala <galak@kernel.crashing.org>2008-12-13 17:01:37 -0600
committerKumar Gala <galak@kernel.crashing.org>2008-12-13 17:02:47 -0600
commite5e774d8833de1a0037be2384efccadf16935675 (patch)
treefaab96f099076670dd73eb85b19d532b0fd2efa6 /drivers/net/wireless/iwlwifi/iwl-3945.h
parentab44f4627e2160cddbddbe8aa8b1d2b2e1559790 (diff)
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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>
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