+ lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file.patch added to mm-nonmm-unstable branch

+ lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: lib/notifier-error-inject: fix error when writing -errno to debugfs file
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file.patch

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

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------------------------------------------------------
From: Akinobu Mita <akinobu.mita@gmail.com>
Subject: lib/notifier-error-inject: fix error when writing -errno to debugfs file
Date: Tue, 20 Sep 2022 02:24:17 +0900

The simple attribute files do not accept a negative value since the commit
488dac0c9237 ("libfs: fix error cast of negative value in
simple_attr_write()").

This restores the previous behaviour by using newly introduced
DEFINE_SIMPLE_ATTRIBUTE_SIGNED instead of DEFINE_SIMPLE_ATTRIBUTE.

Link: https://lkml.kernel.org/r/20220919172418.45257-3-akinobu.mita@gmail.com
Fixes: 488dac0c9237 ("libfs: fix error cast of negative value in simple_attr_write()")
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reported-by: Zhao Gongyi <zhaogongyi@huawei.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: David Hildenbrand <david@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/lib/notifier-error-inject.c~lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file
+++ a/lib/notifier-error-inject.c
@@ -15,7 +15,7 @@ static int debugfs_errno_get(void *data,
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(fops_errno, debugfs_errno_get, debugfs_errno_set,
+DEFINE_SIMPLE_ATTRIBUTE_SIGNED(fops_errno, debugfs_errno_get, debugfs_errno_set,
 			"%lld\n");
 
 static struct dentry *debugfs_create_errno(const char *name, umode_t mode,
_

Patches currently in -mm which might be from akinobu.mita@gmail.com are

libfs-add-define_simple_attribute_signed-for-signed-value.patch
lib-notifier-error-inject-fix-error-when-writing-errno-to-debugfs-file.patch
debugfs-fix-error-when-writing-negative-value-to-atomic_t-debugfs-file.patch