On Thu, Nov 19, 2020 at 03:13:16PM +0000, Matthew Wilcox wrote:
> On Wed, Nov 18, 2020 at 09:47:57AM +0100, Christoph Hellwig wrote:
> > @@ -2887,13 +2887,13 @@ EXPORT_SYMBOL(filemap_map_pages);
> > vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
> > {
> > struct page *page = vmf->page;
> > - struct inode *inode = file_inode(vmf->vma->vm_file);
> > + struct inode *inode = vmf->vma->vm_file->f_mapping->host;
> > vm_fault_t ret = VM_FAULT_LOCKED;
> >
> > sb_start_pagefault(inode->i_sb);
> > file_update_time(vmf->vma->vm_file);
> > lock_page(page);
> > - if (page->mapping != inode->i_mapping) {
> > + if (page->mapping != vmf->vma->vm_file->f_mapping) {
>
> Bit messy. I'd do:
>
> struct address_space *mapping = vmf->vma->vm_file->f_mapping;
>
> sb_start_pagefault(mapping->host->i_sb);
>
> if (page->mapping != mapping)
>
> sb_end_pagefault(mapping->host->i_sb);
Fine with me.
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