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| author |   Jack Steiner <steiner@sgi.com> | 2009-12-15 16:48:11 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:15 -0800 |
| commit | 67bf04a5c2574e9495f660f418f6df776821d578 (patch) | |
| tree | ff28ab4983b007136da88786c8966ea1598841a0 /drivers/misc/sgi-gru/gru_instructions.h | |
| parent | gru: check for valid vma (diff) | |
| download | linux-dev-67bf04a5c2574e9495f660f418f6df776821d578.tar.xz linux-dev-67bf04a5c2574e9495f660f418f6df776821d578.zip | |
gru: fix prefetch and speculation bugs
Fix several bugs related to prefetch, ordering & speculation:
- GRU cch_allocate() instruction causes cacheable memory
to be created. Add a barriers to prevent speculation
from prefetching data before it exists.
- Add memory barriers before cache-flush instructions to ensure
that previously stored data is included in the line flushed to memory.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/gru_instructions.h')
| -rw-r--r-- | drivers/misc/sgi-gru/gru_instructions.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h index e033b6ce4a3f..32f358d9f429 100644 --- a/drivers/misc/sgi-gru/gru_instructions.h +++ b/drivers/misc/sgi-gru/gru_instructions.h @@ -325,6 +325,7 @@ static inline void gru_flush_cache(void *p) static inline void gru_start_instruction(struct gru_instruction *ins, int op32) { gru_ordered_store_int(ins, op32); + mb(); gru_flush_cache(ins); } |