+static inline int page_is_rtas_user_buf(unsigned long pfn)
+{
+ unsigned long paddr = (pfn << PAGE_SHIFT);
+ if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf +
RTAS_RMOBUF_MAX))
It probably cannot overflow with actual values of rtas_rmo_buf
and RTAS_RMOBUF_MAX, but otherwise it is
On Sat, 2011-12-03 at 04:22 +0100, Segher Boessenkool wrote:
> > +static inline int page_is_rtas_user_buf(unsigned long pfn)
> > +{
> > + unsigned long paddr = (pfn << PAGE_SHIFT);
> > + if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf +
> > RTAS_RMOBUF_MAX))
>
> It probably cannot overflo
+static inline int page_is_rtas_user_buf(unsigned long pfn)
+{
+ unsigned long paddr = (pfn << PAGE_SHIFT);
+ if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf +
RTAS_RMOBUF_MAX))
It probably cannot overflow with actual values of rtas_rmo_buf
and RTAS_RMOBUF_MAX, but otherwise it is an
Subject: [PATCH 1/1] Punch a hole in /dev/mem for librtas
With CONFIG_STRICT_DEVMEM=y, user space cannot read any part of /dev/mem.
Since this breaks librtas, punch a hole in /dev/mem to allow access to the
rmo_buffer that librtas needs.
Anton Blanchard reported the problem and helped with the
