sh: Use more aggressive dcache purging in kmap teardown.
This fixes up a number of outstanding issues observed with old mappings
on the same colour hanging around. This requires some more optimal
handling, but is a safe fallback until all of the corner cases have been
handled.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index 8e4a8d1..35c37b7 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -97,7 +97,7 @@
}
if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
- __flush_wback_region(vto, PAGE_SIZE);
+ __flush_purge_region(vto, PAGE_SIZE);
kunmap_atomic(vto, KM_USER1);
/* Make sure this page is cleared on other CPU's too before using it */
@@ -112,7 +112,7 @@
clear_page(kaddr);
if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK))
- __flush_wback_region(kaddr, PAGE_SIZE);
+ __flush_purge_region(kaddr, PAGE_SIZE);
kunmap_atomic(kaddr, KM_USER0);
}
@@ -134,7 +134,7 @@
unsigned long addr = (unsigned long)page_address(page);
if (pages_do_alias(addr, address & PAGE_MASK))
- __flush_wback_region((void *)addr, PAGE_SIZE);
+ __flush_purge_region((void *)addr, PAGE_SIZE);
}
}
}
@@ -149,10 +149,11 @@
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
- __flush_wback_region((void *)kaddr, PAGE_SIZE);
+ /* XXX.. For now kunmap_coherent() does a purge */
+ /* __flush_purge_region((void *)kaddr, PAGE_SIZE); */
kunmap_coherent(kaddr);
} else
- __flush_wback_region((void *)addr, PAGE_SIZE);
+ __flush_purge_region((void *)addr, PAGE_SIZE);
}
}