linux-kernel - [PATCH 0/3] find_next_iomem

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Message-ID: <153805773703.1157.14773321497580233478.stgit@bhelgaas-glaptop.roam.corp.google.com>
Date:   Thu, 27 Sep 2018 09:21:49 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Lianbo Jiang <lijiang@...hat.com>, Vivek Goyal <vgoyal@...hat.com>,
        kexec@...ts.infradead.org, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, x86@...nel.org, akpm@...ux-foundation.org,
        dan.j.williams@...el.com, thomas.lendacky@....com,
        baiyaowei@...s.chinamobile.com, tiwai@...e.de, bp@...e.de,
        brijesh.singh@....com, dyoung@...hat.com, bhe@...hat.com
Subject: [PATCH 0/3] find_next_iomem_res() fixes

These fix:

  - A kexec off-by-one error that we probably never see in practice (only
    affects a resource starting at exactly 640KB).

  - A corner case in walk_iomem_res_desc(), walk_system_ram_res(), etc that
    we probably also never see in practice (only affects a single byte
    resource at the very end of the region we're searching)

  - An issue in walk_iomem_res_desc() that apparently causes a kdump issue
    (see Lianbo's note at [1]).

I think we need to fix the kdump issue either by these patches
(specifically the last one) or by the patch Lianbo posted [2].

I'm hoping to avoid deciding and merging these myself, but I'm not
sure who really wants to own kernel/resource.c.

[1] https://lore.kernel.org/lkml/01551d06-c421-5df3-b19f-fc66f3639e4f@redhat.com
[2] https://lore.kernel.org/lkml/20180921073211.20097-2-lijiang@redhat.com

---

Bjorn Helgaas (3):
      x86/kexec: Correct KEXEC_BACKUP_SRC_END off-by-one error
      resource: Include resource end in walk_*() interfaces
      resource: Fix find_next_iomem_res() iteration issue


 arch/x86/include/asm/kexec.h |    2 -
 kernel/resource.c            |   96 ++++++++++++++++++------------------------
 2 files changed, 43 insertions(+), 55 deletions(-)