Hello,
On 2015-02-05 11:13, Carlo Caione wrote:
On Wed, Feb 4, 2015 at 11:21 AM, Marek Szyprowski
<m.szyprowski@xxxxxxxxxxx> wrote:
On 2015-02-04 10:23, Carlo Caione wrote:
From: "Jasper St. Pierre" <jstpierre@xxxxxxxxxxx>
Even without an iommu, NO_KERNEL_MAPPING is still convenient to save on
kernel address space in places where we don't need a kernel mapping.
Implement support for it in the two places where we're creating an
expensive mapping.
__alloc_from_pool uses an internal pool from which we already have
virtual addresses, so it's not relevant, and __alloc_simple_buffer uses
alloc_pages, which will always return a lowmem page, which is already
mapped into kernel space, so we can't prevent a mapping for it in that
case.
Signed-off-by: Jasper St. Pierre <jstpierre@xxxxxxxxxxx>
Signed-off-by: Carlo Caione <carlo@xxxxxxxxxx>
Reviewed-by: Rob Clark <robdclark@xxxxxxxxx>
Reviewed-by: Daniel Drake <dsd@xxxxxxxxxxxx>
Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Thanks. Who is supposed to take this patch? Russel?
I think this will be the best way to get it merged. Please upload it to
http://www.arm.linux.org.uk/developer/patches/
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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