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Commit 5b167c12 authored by Kamal Dasu's avatar Kamal Dasu Committed by Ralf Baechle
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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: default avatarKamal Dasu <kdasu.kdev@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/5469/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent d8dfad38

arch/mips/mm/gup.c

+2 −1
Original line number Diff line number Diff line
@@ -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' */