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| author | Vineet Gupta <vgupta@synopsys.com> | 2014-03-07 13:22:22 +0530 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-03-07 10:12:56 -0800 |
| commit | b053940df41808f0f27568eb36820d10a8a987f8 (patch) | |
| tree | 650fcd1af2047258705e2d722fbdf2369780184f /arch/arc/mm | |
| parent | e1aa17c7b52c2cc1a4c20f62deadcd94ce8b632c (diff) | |
| download | talos-op-linux-b053940df41808f0f27568eb36820d10a8a987f8.tar.gz talos-op-linux-b053940df41808f0f27568eb36820d10a8a987f8.zip | |
ARC: Use correct PTAG register for icache flush
This fixes a subtle issue with cache flush which could potentially cause
random userspace crashes because of stale icache lines.
This error crept in when consolidating the cache flush code
Fixes: bd12976c3664 (ARC: cacheflush refactor #3: Unify the {d,i}cache)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 3.13
Cc: arc-linux-dev@synopsys.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/cache_arc700.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arc/mm/cache_arc700.c b/arch/arc/mm/cache_arc700.c index 6b58c1de7577..400c663b21c2 100644 --- a/arch/arc/mm/cache_arc700.c +++ b/arch/arc/mm/cache_arc700.c @@ -282,7 +282,7 @@ static inline void __cache_line_loop(unsigned long paddr, unsigned long vaddr, #else /* if V-P const for loop, PTAG can be written once outside loop */ if (full_page_op) - write_aux_reg(ARC_REG_DC_PTAG, paddr); + write_aux_reg(aux_tag, paddr); #endif while (num_lines-- > 0) { @@ -296,7 +296,7 @@ static inline void __cache_line_loop(unsigned long paddr, unsigned long vaddr, write_aux_reg(aux_cmd, vaddr); vaddr += L1_CACHE_BYTES; #else - write_aux_reg(aux, paddr); + write_aux_reg(aux_cmd, paddr); paddr += L1_CACHE_BYTES; #endif } |
