For VM_PFNMAP and VM_MIXEDMAP we use vm_ops->pfn_mkwrite instead of vm_ops->page_mkwrite to notify abort write access. This means we want vma->vm_page_prot to be write-protected if the VMA provides this vm_ops. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Yigal Korman <yigal@xxxxxxxxxxxxx> Cc: Boaz Harrosh <boaz@xxxxxxxxxxxxx> Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: Dave Chinner <david@xxxxxxxxxxxxx> --- mm/mmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index df6d5f07035b..3f78bceefe5a 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1498,7 +1498,8 @@ int vma_wants_writenotify(struct vm_area_struct *vma) return 0; /* The backer wishes to know when pages are first written to? */ - if (vma->vm_ops && vma->vm_ops->page_mkwrite) + if (vma->vm_ops && + (vma->vm_ops->page_mkwrite || vma->vm_ops->pfn_mkwrite)) return 1; /* The open routine did something to the protections that pgprot_modify -- 2.5.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>