From 101d2be7646b7dd1c367d50208a59b29fce61398 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 21 Nov 2005 21:32:16 -0800 Subject: [PATCH] unpaged: VM_NONLINEAR VM_RESERVED There's one peculiar use of VM_RESERVED which the previous patch left behind: because VM_NONLINEAR's try_to_unmap_cluster uses vm_private_data as a swapout cursor, but should never meet VM_RESERVED vmas, it was a way of extending VM_NONLINEAR to VM_RESERVED vmas using vm_private_data for some other purpose. But that's an empty set - they don't have the populate function required. So just throw away those VM_RESERVED tests. But one more interesting in rmap.c has to go too: try_to_unmap_one will want to swap out an anonymous page from VM_RESERVED or VM_UNPAGED area. Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/fremap.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'mm/fremap.c') diff --git a/mm/fremap.c b/mm/fremap.c index 94254c5d7a18..007cbad9331e 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -204,12 +204,10 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size, * Make sure the vma is shared, that it supports prefaulting, * and that the remapped range is valid and fully within * the single existing vma. vm_private_data is used as a - * swapout cursor in a VM_NONLINEAR vma (unless VM_RESERVED - * or VM_LOCKED, but VM_LOCKED could be revoked later on). + * swapout cursor in a VM_NONLINEAR vma. */ if (vma && (vma->vm_flags & VM_SHARED) && - (!vma->vm_private_data || - (vma->vm_flags & (VM_NONLINEAR|VM_RESERVED))) && + (!vma->vm_private_data || (vma->vm_flags & VM_NONLINEAR)) && vma->vm_ops && vma->vm_ops->populate && end > start && start >= vma->vm_start && end <= vma->vm_end) { -- cgit v1.2.3-70-g09d2