ARM: remove unnecessary cache flush

This cache flush occurs when we first insert a page into the page
tables, where a page did not exist previously.  There can be no
cache lines associated with this virtual mapping, so this cache
flush is redundant.

Tested-by: Mike Rapoport <mike@compulab.co.il>
Tested-by: Mikael Pettersson <mikpe at it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
index c9b97e9..82df01a 100644 (file)
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -133,8 +133,6 @@ make_coherent(struct address_space *mapping, struct vm_area_struct *vma,
        flush_dcache_mmap_unlock(mapping);
        if (aliases)
                do_adjust_pte(vma, addr, pfn, ptep);
-       else
-               flush_cache_page(vma, addr, pfn);
 }
 
 /*