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| author | Kamal Dasu <kdasu.kdev@gmail.com> | 2013-06-14 17:10:03 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-08-26 15:26:48 +0200 |
| commit | 5b167c123b3c3582f62cf1896465019bc40fe526 (patch) | |
| tree | 2deef8956db6c917fad2a58e651b609d4b412588 | |
| parent | d8dfad3876e4386666b759da3c833d62fb8b2267 (diff) | |
| download | blackbird-op-linux-5b167c123b3c3582f62cf1896465019bc40fe526.tar.gz blackbird-op-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>
| -rw-r--r-- | arch/mips/mm/gup.c | 3 |
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' */ |
