Groups > linux.kernel > #1531987

Re: [PATCH] mtd: Allocate bdi objects dynamically

From	Sandeep Jain <Sandeep_Jain@mentor.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mtd: Allocate bdi objects dynamically
Date	2016-11-29 09:20 +0100
Message-ID	<sILNU-5On-5@gated-at.bofh.it> (permalink)
References	<s2rvs-1NC-11@gated-at.bofh.it> <s2rvs-1NC-5@gated-at.bofh.it> <sip6h-3Li-3@gated-at.bofh.it> <szoxb-3eu-21@gated-at.bofh.it> <sA3K2-4Yr-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Dear Maintainers,
   This patch is already reviewed twice with no issues.
Requesting your attention for patch merge.

Thanks & Regards,
Sandeep Jain

On Sat, Nov 05, 2016 at 08:22:31AM +0100, Marek Vasut wrote:
> On 11/03/2016 12:34 PM, Sandeep Jain wrote:
> > Dear Maintainers,
> >   This patch is reviewed by Richard.
> > Requesting for Maintainer's attention for patch merge.
> > 
> > Thanks & Regards,
> > Sandeep Jain
> > 
> > On Sat, Sep 17, 2016 at 04:41:47PM +0200, Richard Weinberger wrote:
> >> On Thu, Aug 4, 2016 at 4:01 PM, Sandeep Jain <Sandeep_Jain@mentor.com> wrote:
> >>> From: Steve Longerbeam <steve_longerbeam@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_longerbeam@mentor.com>
> >>> Signed-off-by: Jim Baxter <jim_baxter@mentor.com>
> >>> Signed-off-by: Sandeep Jain <Sandeep_Jain@mentor.com>
> >>
> >> Reviewed-by: Richard Weinberger <richard@nod.at>
> 
> I don't see any obvious problem either:
> Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
> 
> -- 
> Best regards,
> Marek Vasut

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH] mtd: Allocate bdi objects dynamically Sandeep Jain <Sandeep_Jain@mentor.com> - 2016-11-29 09:20 +0100
  Re: [PATCH] mtd: Allocate bdi objects dynamically Marek Vasut <marek.vasut@gmail.com> - 2016-12-01 17:00 +0100
    Re: [PATCH] mtd: Allocate bdi objects dynamically Marek Vasut <marek.vasut@gmail.com> - 2016-12-01 19:20 +0100
    Re: [PATCH] mtd: Allocate bdi objects dynamically Brian Norris <computersforpeace@gmail.com> - 2016-12-01 19:20 +0100

csiph-web