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| author | Roland Dreier <rolandd@cisco.com> | 2005-10-28 17:46:18 -0700 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-10-29 14:25:49 +1000 |
| commit | 8b150478aeb1a8edb9015c2f7ac4da637ff65c45 (patch) | |
| tree | 621b038b9c041fe82b708c6c5cbee655be2a519a /include/asm-ppc/pgtable.h | |
| parent | d49b340124a34fcb8bceda472558ccef7232c16f (diff) | |
| download | linux-8b150478aeb1a8edb9015c2f7ac4da637ff65c45.tar.gz linux-8b150478aeb1a8edb9015c2f7ac4da637ff65c45.tar.bz2 linux-8b150478aeb1a8edb9015c2f7ac4da637ff65c45.zip | |
[PATCH] ppc: make phys_mem_access_prot() work with pfns instead of addresses
Change the phys_mem_access_prot() function to take a pfn instead of an
address. This allows mmap64() to work on /dev/mem for addresses above 4G
on 32-bit architectures. We start with a pfn in mmap_mem(), so there's no
need to convert to an address; in fact, it's actively bad, since the
conversion can overflow when the address is above 4G.
Similarly fix the ppc32 page_is_ram() function to avoid a conversion to an
address by directly comparing to max_pfn. Working with max_pfn instead of
high_memory fixes page_is_ram() to give the right answer for highmem pages.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc/pgtable.h')
| -rw-r--r-- | include/asm-ppc/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-ppc/pgtable.h b/include/asm-ppc/pgtable.h index eee601bb9ada..b28a713ba862 100644 --- a/include/asm-ppc/pgtable.h +++ b/include/asm-ppc/pgtable.h @@ -705,7 +705,7 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry, int dirty) #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_NO_CACHE | _PAGE_GUARDED)) struct file; -extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr, +extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot); #define __HAVE_PHYS_MEM_ACCESS_PROT |