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author | Scott Wood <scottwood@freescale.com> | 2014-05-22 16:10:35 -0500 |
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committer | Scott Wood <scottwood@freescale.com> | 2014-06-20 18:48:30 -0500 |
commit | 1cb4ed92f6a5a8961b122d11e651870ba741245b (patch) | |
tree | fef4fb40f49ff85d449410711a6c434a3d35b236 /fs | |
parent | bbd08c72c6b3344a230e15264d6cd444ed76b958 (diff) |
powerpc/e6500: hw tablewalk: fix recursive tlb lock on cpu 0
Commit 82d86de25b9c99db546e17c6f7ebf9a691da557e "TLB lock recursive"
introduced a bug whereby cpu 0 uses the same value for "lock held" as
is used to indicate that the lock is free. This means that cpu 1 can
acquire the lock whenever it wants, regardless of whether cpu 0 has it
locked, which in turn means we can get duplicate TLB entries.
Add one to the CPU value to ensure we do not use zero as a "lock held"
value.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Reported-by: Ed Swarthout <ed.swarthout@freescale.com>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions