* [PATCH] MIPS: remove aliasing alignment if HW has antialising support
@ 2015-11-20 1:38 Leonid Yegoshin
0 siblings, 0 replies; only message in thread
From: Leonid Yegoshin @ 2015-11-20 1:38 UTC (permalink / raw)
To: linux-mips, cernekee, linux-kernel, ralf, paul.gortmaker, macro,
markos.chandras, kumba
MIPS hardware may have an antialising support and it works even
page size is small.
Setup a shared memory aliasing mask to page size if hardware has
an antialising support. Big shared memory mask forces a disruption
in page address assignment and that corrupts Android library memory
handling.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
---
arch/mips/mm/c-r4k.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 5d3a25e1cfae..493f5226da10 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1670,7 +1670,7 @@ void r4k_cache_init(void)
* This code supports virtually indexed processors and will be
* unnecessarily inefficient on physically indexed processors.
*/
- if (c->dcache.linesz)
+ if (c->dcache.linesz && cpu_has_dc_aliases)
shm_align_mask = max_t( unsigned long,
c->dcache.sets * c->dcache.linesz - 1,
PAGE_SIZE - 1);
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