Looking at this:
static int cifs_readpage_worker(struct file *file, struct page *page,
loff_t *poffset)
{
char *read_data;
int rc;
/* Is the page cached? */
rc = cifs_readpage_from_fscache(file_inode(file), page);
if (rc == 0)
goto read_complete;
Should you return here if rc == -ENOMEM or -ERESTARTSYS? That might break
cifs_write_begin() though - which perhaps ought to check the return value.
Your patch, however, looks okay otherwise, so feel free to add:
Acked-by: David Howells <dhowells@xxxxxxxxxx>
David
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