From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregkh@linuxfoundation.org (Greg Kroah-Hartman) Date: Mon, 8 Feb 2016 10:30:06 -0800 Subject: [RESEND2 PATCH 1/3] memremap: add MEMREMAP_WC flag In-Reply-To: <9085d37fa97a762a46b9d58719c085368682c64f.1454950917.git.brian.starkey@arm.com> References: <9085d37fa97a762a46b9d58719c085368682c64f.1454950917.git.brian.starkey@arm.com> Message-ID: <20160208183006.GA8429@kroah.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Feb 08, 2016 at 05:30:50PM +0000, Brian Starkey wrote: > Add a flag to memremap() for writecombine mappings. Mappings satisfied > by this flag will not be cached, however writes may be delayed or > combined into more efficient bursts. This is most suitable for > buffers written sequentially by the CPU for use by other DMA devices. > > Signed-off-by: Brian Starkey > Reviewed-by: Catalin Marinas > --- > include/linux/io.h | 1 + > kernel/memremap.c | 15 +++++++++++++-- > 2 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/include/linux/io.h b/include/linux/io.h > index 32403b5..e2c8419 100644 > --- a/include/linux/io.h > +++ b/include/linux/io.h > @@ -135,6 +135,7 @@ enum { > /* See memremap() kernel-doc for usage description... */ > MEMREMAP_WB = 1 << 0, > MEMREMAP_WT = 1 << 1, > + MEMREMAP_WC = 1 << 2, You didn't update the documentation :(