From 2a9a9d4f6c07f2f23b663fe5fbeac1168a5d1029 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 07 Nov 2023 06:19:50 +0000
Subject: [PATCH] support uboot change LCD parameter
---
kernel/include/linux/sched/mm.h | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/kernel/include/linux/sched/mm.h b/kernel/include/linux/sched/mm.h
index ef54f4b..88e1a56 100644
--- a/kernel/include/linux/sched/mm.h
+++ b/kernel/include/linux/sched/mm.h
@@ -49,6 +49,17 @@
__mmdrop(mm);
}
+#ifdef CONFIG_PREEMPT_RT_BASE
+extern void __mmdrop_delayed(struct rcu_head *rhp);
+static inline void mmdrop_delayed(struct mm_struct *mm)
+{
+ if (atomic_dec_and_test(&mm->mm_count))
+ call_rcu(&mm->delayed_drop, __mmdrop_delayed);
+}
+#else
+# define mmdrop_delayed(mm) mmdrop(mm)
+#endif
+
void mmdrop(struct mm_struct *mm);
/*
--
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