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[PATCH] mm: remove VM_LOCKED before remap_pfn_range and drop VM_SHM

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Remove VM_LOCKED before remap_pfn range from device drivers and get rid of
VM_SHM.

remap_pfn_range() already sets VM_IO.  There is no need to set VM_SHM since
it does nothing.  VM_LOCKED is of no use since the remap_pfn_range does not
place pages on the LRU.  The pages are therefore never subject to swap
anyways.  Remove all the vm_flags settings before calling remap_pfn_range.

After removing all the vm_flag settings no use of VM_SHM is left.  Drop it.

Signed-off-by: Christoph Lameter <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-06-25 05:46:47 -07:00 • committed by Linus Torvalds
commit 68402ddc67
14 changed files with 1 additions and 32 deletions
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12
arch/xtensa/kernel/pci.c
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@ -349,17 +349,6 @@ __pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma,
return -EINVAL;
}
/*
* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
* mapping.
*/
static __inline__ void
__pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
enum pci_mmap_state mmap_state)
{
vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
}
/*
* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
* device mapping.
@ -399,7 +388,6 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
if (ret < 0)
return ret;
__pci_mmap_set_flags(dev, vma, mmap_state);
__pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine);
ret = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,