Re: [PATCHv4 02/10] fbdev: ssd1307fb: Allocate page aligned video memory.

[Maxime Ripard]

On Mon, Mar 16, 2015 at 06:11:50PM +0100, Thomas Niederprüm wrote:
> Currently the videomemory is allocated by kmalloc, making it a memory
> region that is not necessarily page aligend. This leads to problems
> upon mmap call, where the video memory's address gets aligned to the
> next page boundary. The result is that the userspace program that issued
> the mmap call is not able to access the video memory from the start to
> the next page boundary.
> 
> This patch changes the allocation of the video memory to use
> __get_free_pages() in order to obtain memory that is aligned
> to page boundaries.
> 
> Signed-off-by: Thomas Niederprüm <niederp@xxxxxxxxxxxxxxxx>

Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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