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mm/hwpoison: disable hwpoison filter during removing 

hwpoison filter is enabled by hwpoison-inject module, after removing this
module, hwpoison filter still works.  What is worse, user can not find the
debugfs entries to know this.

Disable the hwpoison filter during removing hwpoison-inject module.

Link: https://lkml.kernel.org/r/20220509105641.491313-5-pizhenwei@bytedance.com
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
zhenwei pi 2022-05-12 20:23:10 -07:00 committed by Andrew Morton
parent 9113eaf331
commit f0696cb406
1 changed files with 1 additions and 0 deletions
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mm/hwpoison-inject.c
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@ -65,6 +65,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(unpoison_fops, NULL, hwpoison_unpoison, "%lli\n");
static void pfn_inject_exit(void)
{
hwpoison_filter_enable = 0;
debugfs_remove_recursive(hwpoison_dir);
}