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| author | Ralf Baechle <ralf@linux-mips.org> | 2009-04-25 11:25:34 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-05-14 13:50:29 +0100 |
| commit | bb86bf28aec6d0a207ae09f38a43e94133d4d6db (patch) | |
| tree | 34bd8f653eb10dc4eb82aa8ef2576475346070e1 /arch/mips/include/asm/fixmap.h | |
| parent | 0b54352600b820a6d25f151cbd8975ed9b2aeb09 (diff) | |
| download | lwn-bb86bf28aec6d0a207ae09f38a43e94133d4d6db.tar.gz lwn-bb86bf28aec6d0a207ae09f38a43e94133d4d6db.zip | |
MIPS: Fix highmem.
Commit 351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 (kernel.org) rsp.
b3594a089f1c17ff919f8f78505c3f20e1f6f8ce (linux-mips.org):
> From: Chris Dearman <chris@mips.com>
> Date: Wed, 19 Sep 2007 00:58:24 +0100
> Subject: [PATCH] [MIPS] Allow setting of the cache attribute at run time.
>
> Slightly tacky, but there is a precedent in the sparc archirecture code.
introduces the variable _page_cachable_default, which defaults to zero and.
is used to create the prototype PTE for __kmap_atomic in
arch/mips/mm/init.c:kmap_init before initialization in
arch/mips/mm/c-r4k.c:coherency_setup, so the default value of 0 will be
used as the CCA of kmap atomic pages which on many processors is not a
defined CCA value and may result in writes to kmap_atomic pages getting
corrupted. Debugged by Jon Fraser (jfraser@broadcom.com).
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/fixmap.h')
| -rw-r--r-- | arch/mips/include/asm/fixmap.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/include/asm/fixmap.h b/arch/mips/include/asm/fixmap.h index 9cc8522a394f..0f5caa1307f1 100644 --- a/arch/mips/include/asm/fixmap.h +++ b/arch/mips/include/asm/fixmap.h @@ -108,6 +108,9 @@ static inline unsigned long virt_to_fix(const unsigned long vaddr) return __virt_to_fix(vaddr); } +#define kmap_get_fixmap_pte(vaddr) \ + pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr)) + /* * Called from pgtable_init() */ |