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authorvenkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>2008-12-18 11:41:29 -0800
committerH. Peter Anvin <hpa@zytor.com>2008-12-18 13:30:15 -0800
commit2ab640379a0ab4cef746ced1d7e04a0941774bcb (patch)
tree53837aaa257f463a0b40c4d00a80fec936558f49 /include/linux/mm.h
parente121e418441525b5636321fe03d16f0193ad218e (diff)
downloadop-kernel-dev-2ab640379a0ab4cef746ced1d7e04a0941774bcb.zip
op-kernel-dev-2ab640379a0ab4cef746ced1d7e04a0941774bcb.tar.gz
x86: PAT: hooks in generic vm code to help archs to track pfnmap regions - v3
Impact: Introduces new hooks, which are currently null. Introduce generic hooks in remap_pfn_range and vm_insert_pfn and corresponding copy and free routines with reserve and free tracking. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index a25024f..87ecb40 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -155,6 +155,12 @@ static inline int is_pfn_mapping(struct vm_area_struct *vma)
return (vma->vm_flags & VM_PFNMAP);
}
+extern int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
+ unsigned long pfn, unsigned long size);
+extern int track_pfn_vma_copy(struct vm_area_struct *vma);
+extern void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
+ unsigned long size);
+
/*
* vm_fault is filled by the the pagefault handler and passed to the vma's
* ->fault function. The vma's ->fault is responsible for returning a bitmask
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