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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2022-09-19 20:24:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-14 12:15:19 +0300 |
| commit | 81d26aa9036aa0254d55ec462145183aef5d5379 (patch) | |
| tree | 8edda1d207d5e1c3c9027659e2ab70cb3835e3fb /Documentation/locking | |
| parent | f649e18c9c1036f02d372afff036f4afb1beeaf9 (diff) | |
| download | linux-81d26aa9036aa0254d55ec462145183aef5d5379.tar.xz | |
debugfs: fix error when writing negative value to atomic_t debugfs file
[ Upstream commit d472cf797c4e268613dbce5ec9b95d0bcae19ecb ]
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()"), 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: 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>
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation/locking')
0 files changed, 0 insertions, 0 deletions