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authorVineet Gupta <vgupta@synopsys.com>2014-03-07 13:22:22 +0530
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-07 10:12:56 -0800
commitb053940df41808f0f27568eb36820d10a8a987f8 (patch)
tree650fcd1af2047258705e2d722fbdf2369780184f
parente1aa17c7b52c2cc1a4c20f62deadcd94ce8b632c (diff)
downloadlinux-b053940df41808f0f27568eb36820d10a8a987f8.tar.gz
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>
-rw-r--r--arch/arc/mm/cache_arc700.c4
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
}