mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure

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commit 392b3d9d59 upstream.

When a DAMOS-scheme DAMON sysfs directory setup fails after setup of
access_pattern/ directory, subdirectories of access_pattern/ directory are
not cleaned up.  As a result, DAMON sysfs interface is nearly broken until
the system reboots, and the memory for the unremoved directory is leaked.

Cleanup the directories under such failures.

Link: https://lkml.kernel.org/r/20251225023043.18579-5-sj@kernel.org
Fixes: 9bbb820a5b ("mm/damon/sysfs: support DAMOS quotas")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: chongjiapeng <jiapeng.chong@linux.alibaba.com>
Cc: <stable@vger.kernel.org> # 5.18.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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SeongJae Park 2025-12-24 18:30:37 -08:00 • committed by Greg Kroah-Hartman

parent b831557a0d

commit 16236b0b4a

1 changed files with 3 additions and 2 deletions

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mm/damon/sysfs-schemes.c

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