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);
--
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