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Subject[PATCH 0/3] [v2] Repair and clean up vm.zone_reclaim_mode sysctl ABI
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A previous cleanup accidentally changed the vm.zone_reclaim_mode ABI.

This series restores the ABI and then reorganizes the code to make
the ABI more obvious. Since the single-patch v1[1], I've:

* Restored the RECLAIM_ZONE naming, comment and Documentation now
that the implicit checks for it are known.
* Move RECLAIM_* definitions to a uapi header
* Add a node_reclaim_enabled() helper

Documentation/admin-guide/sysctl/vm.rst | 10 +++++-----
include/linux/swap.h | 7 +++++++
include/uapi/linux/mempolicy.h | 7 +++++++
mm/khugepaged.c | 2 +-
mm/page_alloc.c | 2 +-
mm/vmscan.c | 3 ---
6 files changed, 21 insertions(+), 10 deletions(-)

1. https://lore.kernel.org/linux-mm/20200626003459.D8E015CA@viggo.jf.intel.com/

Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: "Tobin C. Harding" <tobin@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Daniel Wagner <dwagner@suse.de>

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