Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote:
> We can't return with VM_FAULT_SIGBUS | VM_FAULT_LOCKED; the core
> code will not unlock the folio in this instance. Introduce a new
> "unlock" error exit to handle this case. Use it to handle
> the "folio is truncated" check, and change the "writeback interrupted
> by a fatal signal" to do a NOPAGE exit instead of letting the core
> code install the folio currently under writeback before killing the
> process.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Fixes: 102a7e2c598c ("netfs: Allow buffered shared-writeable mmap through netfs_page_mkwrite()")
Acked-by: David Howells <dhowells@xxxxxxxxxx>
