linux-kernel - [PATCH 0/2] mm: remove pfn_valid_within() and CONFIG_HOLES_IN

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Date:   Tue, 13 Jul 2021 11:00:33 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mike Rapoport <rppt@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 0/2] mm: remove pfn_valid_within() and CONFIG_HOLES_IN_ZONE

From: Mike Rapoport <rppt@...ux.ibm.com>

Hi,

After recent updates to freeing unused parts of the memory map, no
architecture can have holes in the memory map within a pageblock. This
makes pfn_valid_within() check and CONFIG_HOLES_IN_ZONE configuration
option redundant.

The first patch removes them both in a mechanical way and the second patch
simplifies memory_hotplug::test_pages_in_a_zone() that had
pfn_valid_within() surrounded by more logic than simple if.

Mike Rapoport (2):
  mm: remove pfn_valid_within() and CONFIG_HOLES_IN_ZONE
  mm: memory_hotplug: cleanup after removal of pfn_valid_within()

 drivers/base/node.c    |  2 --
 include/linux/mmzone.h | 12 ------------
 mm/Kconfig             |  3 ---
 mm/compaction.c        | 20 +++++++-------------
 mm/memory_hotplug.c    | 13 +++----------
 mm/page_alloc.c        | 24 ++----------------------
 mm/page_isolation.c    |  7 +------
 mm/page_owner.c        | 14 +-------------
 8 files changed, 14 insertions(+), 81 deletions(-)


base-commit: e73f0f0ee7541171d89f2e2491130c7771ba58d3
-- 
2.28.0