On Fri, Jun 18, 2021 at 11:37:28AM +0800, Herbert Xu wrote:
> On Thu, Jun 17, 2021 at 08:01:57PM -0700, Ira Weiny wrote:
> >
> > > + flush_kernel_dcache_page(__page); \
> >
> > Is this required on 32bit systems? Why is kunmap_flush_on_unmap() not
> > sufficient on 64bit
On Thu, Jun 17, 2021 at 08:01:57PM -0700, Ira Weiny wrote:
>
> > + flush_kernel_dcache_page(__page); \
>
> Is this required on 32bit systems? Why is kunmap_flush_on_unmap() not
> sufficient on 64bit systems? The normal kunmap_local() path does that.
>
> I'm sorry but I
On Tue, Jun 15, 2021 at 03:24:39PM +0200, Christoph Hellwig wrote:
> Add a helper that calls flush_kernel_dcache_page before unmapping the
> local mapping. flush_kernel_dcache_page is required for all pages
> potentially mapped into userspace that were written to using kmap*,
> so having a helper
