From e3e12f52b214121840b44c91de5b3e5af5d3eb84 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 06 Nov 2023 03:04:41 +0000
Subject: [PATCH] rk3568 rt init
---
kernel/arch/x86/mm/pageattr.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/kernel/arch/x86/mm/pageattr.c b/kernel/arch/x86/mm/pageattr.c
index 101f3ad..0b03962 100644
--- a/kernel/arch/x86/mm/pageattr.c
+++ b/kernel/arch/x86/mm/pageattr.c
@@ -688,11 +688,17 @@
spin_lock(&pgd_lock);
/*
+ * Keep preemption disabled after __flush_tlb_all() which expects not be
+ * preempted during the flush of the local TLB.
+ */
+ preempt_disable();
+ /*
* Check for races, another CPU might have split this page
* up for us already:
*/
tmp = _lookup_address_cpa(cpa, address, &level);
if (tmp != kpte) {
+ preempt_enable();
spin_unlock(&pgd_lock);
return 1;
}
@@ -726,6 +732,7 @@
break;
default:
+ preempt_enable();
spin_unlock(&pgd_lock);
return 1;
}
@@ -764,6 +771,7 @@
* going on.
*/
__flush_tlb_all();
+ preempt_enable();
spin_unlock(&pgd_lock);
return 0;
--
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