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Akinobu Mita d472cf797c debugfs: fix error when writing negative value to atomic_t debugfs file 
The simple attribute files do not accept a negative value since the commit
488dac0c92 ("libfs: fix error cast of negative value in
simple_attr_write()"), so we have to use a 64-bit value to write a
negative value for a debugfs file created by debugfs_create_atomic_t().

This restores the previous behaviour by introducing
DEFINE_DEBUGFS_ATTRIBUTE_SIGNED for a signed value.

Link: https://lkml.kernel.org/r/20220919172418.45257-4-akinobu.mita@gmail.com
Fixes: 488dac0c92 ("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>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
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>
2022-11-30 16:13:16 -08:00
..
fault-injection.rst debugfs: fix error when writing negative value to atomic_t debugfs file 2022-11-30 16:13:16 -08:00
index.rst docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
notifier-error-inject.rst docs: notifier-error-inject: Correct test's name 2022-10-07 10:32:16 -06:00
nvme-fault-injection.rst nvme: rename and document nvme_end_request 2020-08-21 17:14:28 -06:00
provoke-crashes.rst lkdtm: remove IDE_CORE_CP crashpoint 2021-08-19 07:40:22 +02:00