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authorKamal Dasu <kdasu.kdev@gmail.com>2013-06-14 19:10:03 +0200
committerRalf Baechle <ralf@linux-mips.org>2013-08-26 15:26:48 +0200
commit5b167c123b3c3582f62cf1896465019bc40fe526 (patch)
tree2deef8956db6c917fad2a58e651b609d4b412588 /arch
parentLinux 3.11-rc7 (diff)
downloadlinux-5b167c123b3c3582f62cf1896465019bc40fe526.tar.xz
linux-5b167c123b3c3582f62cf1896465019bc40fe526.zip
MIPS: Fix get_user_page_fast() for mips with cache alias
get_user_pages_fast() is missing cache flushes for MIPS platforms with cache aliases. Filesystem failures observed with DirectIO operations due to missing flush_anon_page() that use page coloring logic to work with cache aliases. This fix falls through to take slow_irqon path that calls get_user_pages() that has required logic for platforms where cpu_has_dc_aliases is true. [ralf@linux-mips.org: Explicity include <asm/cpu-features.h>.] Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/5469/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/mm/gup.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index d4ea5c9c4a93..06ce17c2a905 100644
--- 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' */