On Thu, Aug 4, 2016 at 4:01 PM, Sandeep Jain <sandeep_j...@mentor.com> wrote:
> From: Steve Longerbeam <steve_longerb...@mentor.com>
> The MTD backing dev info objects mtd_bdi was statically allocated.
> So when MTD is built as a loadable module, this object fall in the
> vmalloc address space.
> The problem with that, is that the BDI APIs use wake_up_bit(), which calls
> virt_to_page() to retrieve the memory zone of the page containing the
> wait_queue to wake up, and virt_to_page() is not valid for vmalloc or
> highmem addresses.
> Fix this by allocating the BDI objects dynamically with kmalloc. The
> objects now fall in the logical address space so that BDI APIs will
> work in all cases (mtd builtin or module).
> Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com>
> Signed-off-by: Jim Baxter <jim_bax...@mentor.com>
> Signed-off-by: Sandeep Jain <sandeep_j...@mentor.com>
Reviewed-by: Richard Weinberger <rich...@nod.at>