From 7d07b3ae8ddad407913c5301877e694430a3263f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 23 Nov 2023 08:24:31 +0000
Subject: [PATCH] add build kerneldeb
---
kernel/fs/namespace.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/kernel/fs/namespace.c b/kernel/fs/namespace.c
index 8775302..db572d7 100644
--- a/kernel/fs/namespace.c
+++ b/kernel/fs/namespace.c
@@ -14,6 +14,7 @@
#include <linux/mnt_namespace.h>
#include <linux/user_namespace.h>
#include <linux/namei.h>
+#include <linux/delay.h>
#include <linux/security.h>
#include <linux/cred.h>
#include <linux/idr.h>
@@ -328,8 +329,11 @@
* incremented count after it has set MNT_WRITE_HOLD.
*/
smp_mb();
- while (READ_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD)
- cpu_relax();
+ while (READ_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD) {
+ preempt_enable();
+ cpu_chill();
+ preempt_disable();
+ }
/*
* After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will
* be set to match its requirements. So we must not load that until
--
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