diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2014-03-07 13:22:22 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-23 21:44:05 -0700 |
| commit | a34ac1c897ff2f45d27a3a67d4443d2206237184 (patch) | |
| tree | 6ee663d6d99bd40642391e43a0c1aa7e50b551ac /arch | |
| parent | 151f4364c35d22fd5d38f55d54f2ac02ab17dbe9 (diff) | |
ARC: Use correct PTAG register for icache flush
commit b053940df41808f0f27568eb36820d10a8a987f8 upstream.
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: arc-linux-dev@synopsys.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -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 } |