diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-28 23:34:23 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-28 23:34:23 +0100 |
| commit | 6aab341e0a28aff100a09831c5300a2994b8b986 (patch) | |
| tree | 1af3908275aa5e1b16e80efee554a9a7504c56d4 /arch/powerpc | |
| parent | [PATCH] drivers/scsi/dpt_i2o.c: fix a NULL pointer dereference (diff) | |
| download | linux-6aab341e0a28aff100a09831c5300a2994b8b986.tar.xz linux-6aab341e0a28aff100a09831c5300a2994b8b986.zip | |
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 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/vdso.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index b44b36e0c293..f0c47dab0903 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -145,8 +145,7 @@ static void dump_vdso_pages(struct vm_area_struct * vma) struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE); struct page *upg = (vma && vma->vm_mm) ? - follow_page(vma->vm_mm, vma->vm_start + - i*PAGE_SIZE, 0) + follow_page(vma, vma->vm_start + i*PAGE_SIZE, 0) : NULL; dump_one_vdso_page(pg, upg); } @@ -157,8 +156,7 @@ static void dump_vdso_pages(struct vm_area_struct * vma) struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE); struct page *upg = (vma && vma->vm_mm) ? - follow_page(vma->vm_mm, vma->vm_start + - i*PAGE_SIZE, 0) + follow_page(vma, vma->vm_start + i*PAGE_SIZE, 0) : NULL; dump_one_vdso_page(pg, upg); } |