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authorLinus Torvalds <torvalds@g5.osdl.org>2005-11-28 17:34:23 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-28 17:34:23 -0500
commit6aab341e0a28aff100a09831c5300a2994b8b986 (patch)
tree1af3908275aa5e1b16e80efee554a9a7504c56d4 /mm/nommu.c
parent458af5439fe7ae7d95ca14106844e61f0795166c (diff)
mm: re-architect the VM_UNPAGED logic
This replaces the (in my opinion horrible) VM_UNMAPPED logic with very explicit support for a "remapped page range" aka VM_PFNMAP. It allows a VM area to contain an arbitrary range of page table entries that the VM never touches, and never considers to be normal pages. Any user of "remap_pfn_range()" automatically gets this new functionality, and doesn't even have to mark the pages reserved or indeed mark them any other way. It just works. As a side effect, doing mmap() on /dev/mem works for arbitrary ranges. Sparc update from David in the next commit. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 6deb6ab3d6ad..c1196812876b 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1045,7 +1045,7 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
1045 1045
1046EXPORT_SYMBOL(find_vma); 1046EXPORT_SYMBOL(find_vma);
1047 1047
1048struct page *follow_page(struct mm_struct *mm, unsigned long address, 1048struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
1049 unsigned int foll_flags) 1049 unsigned int foll_flags)
1050{ 1050{
1051 return NULL; 1051 return NULL;