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| author |   Alexey Brodkin <Alexey.Brodkin@synopsys.com> | 2016-03-28 14:36:38 +0300 |
|---|---|---|
| committer |   Vineet Gupta <vgupta@synopsys.com> | 2016-04-07 14:59:09 +0530 |
| commit | e5e0a65cd20a7a892a87e6bd73bdc3d83726d725 (patch) | |
| tree | 52b6bbcef2d992c6127ab156ff59567dfae780f9 /arch/arc/boot/dts/axs10x_mb.dtsi | |
| parent | ARC: Don't source drivers/pci/pcie/Kconfig ourselves (diff) | |
| download | linux-dev-e5e0a65cd20a7a892a87e6bd73bdc3d83726d725.tar.xz linux-dev-e5e0a65cd20a7a892a87e6bd73bdc3d83726d725.zip | |
arc: Add our own implementation of fb_pgprotect()
During mmaping of frame-buffer pages to user-space
fb_protect() is called to set proper page settings.
In case of ARC we need to mark pages that are mmaped to
user as uncached because of 2 reasons:
* Huge amount of data if passing through data cache will
thrash cache a lot making cache almost useless for other
less traffic hungry processes.
* Data written by user in FB will be immediately available for
hardware (such as PGU etc) without requirements to flush data
cache regularly.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions