+ mm-zswap-skip-confusing-print-info.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/zswap: skip confusing print info
has been added to the -mm mm-unstable branch.  Its filename is
     mm-zswap-skip-confusing-print-info.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zswap-skip-confusing-print-info.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Liu Shixin <liushixin2@huawei.com>
Subject: mm/zswap: skip confusing print info
Date: Sat, 27 Aug 2022 18:46:00 +0800

It's confusing when we disable zswap while zswap is init failed or has no
pool.  If no change required, just return directly.

Link: https://lkml.kernel.org/r/20220827104600.1813214-6-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/zswap.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/mm/zswap.c~mm-zswap-skip-confusing-print-info
+++ a/mm/zswap.c
@@ -886,6 +886,15 @@ static int zswap_zpool_param_set(const c
 static int zswap_enabled_param_set(const char *val,
 				   const struct kernel_param *kp)
 {
+	bool res;
+
+	if (kstrtobool(val, &res))
+		return -EINVAL;
+
+	/* no change required */
+	if (res == *(bool *)kp->arg)
+		return 0;
+
 	if (system_state == SYSTEM_RUNNING) {
 		mutex_lock(&zswap_init_lock);
 		if (zswap_setup()) {
_

Patches currently in -mm which might be from liushixin2@huawei.com are

bootmem-remove-the-vmemmap-pages-from-kmemleak-in-put_page_bootmem.patch
frontswap-skip-frontswap_ops-init-if-zswap-init-failed.patch
frontswap-invoke-ops-init-for-online-swap-device-in-frontswap_register_ops.patch
mm-zswap-replace-zswap_init_started-failed-with-zswap_init_state.patch
mm-zswap-delay-the-initializaton-of-zswap-until-the-first-enablement.patch
mm-zswap-skip-confusing-print-info.patch