Use file->f_mapping in all functions that have a struct file available
to properly handle the case where file_inode(file)->i_mapping !=
inode->i_mapping.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
mm/filemap.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index d5e7c2029d16b4..3e3531a757f8db 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -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) {
unlock_page(page);
ret = VM_FAULT_NOPAGE;
goto out;
@@ -3149,10 +3149,9 @@ void dio_warn_stale_pagecache(struct file *filp)
{
static DEFINE_RATELIMIT_STATE(_rs, 86400 * HZ, DEFAULT_RATELIMIT_BURST);
char pathname[128];
- struct inode *inode = file_inode(filp);
char *path;
- errseq_set(&inode->i_mapping->wb_err, -EIO);
+ errseq_set(&filp->f_mapping->wb_err, -EIO);
if (__ratelimit(&_rs)) {
path = file_path(filp, pathname, sizeof(pathname));
if (IS_ERR(path))
@@ -3179,7 +3178,7 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from)
if (iocb->ki_flags & IOCB_NOWAIT) {
/* If there are pages to writeback, return */
- if (filemap_range_has_page(inode->i_mapping, pos,
+ if (filemap_range_has_page(file->f_mapping, pos,
pos + write_len - 1))
return -EAGAIN;
} else {
--
2.29.2
