MIPS: Fix get_user_page_fast() for mips with cache alias

[linux.git] / arch / mips / mm / gup.c

diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index d4ea5c9c4a93add70ec6e33b1efce8ab5b810c54..06ce17c2a905af5be1bb9bae744d2f03abc64a6e 100644 (file)
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -12,6 +12,7 @@
 #include <linux/swap.h>
 #include <linux/hugetlb.h>
 
+#include <asm/cpu-features.h>
 #include <asm/pgtable.h>
 
 static inline pte_t gup_get_pte(pte_t *ptep)
@@ -273,7 +274,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
        len = (unsigned long) nr_pages << PAGE_SHIFT;
 
        end = start + len;
-       if (end < start)
+       if (end < start || cpu_has_dc_aliases)
                goto slow_irqon;
 
        /* XXX: batch / limit 'nr' */