The uvm_swap_data_lock mutex can now be taken without holding the kernel

lock.  So it needs IPL_MPFLOOR to prevent lock ordering issues.

ok jca@

diff --git a/sys/uvm/uvm_swap.c b/sys/uvm/uvm_swap.c
index 38f27cf..2796325 100644 (file)
--- a/sys/uvm/uvm_swap.c
+++ b/sys/uvm/uvm_swap.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: uvm_swap.c,v 1.165 2022/10/11 11:46:58 jsg Exp $      */
+/*     $OpenBSD: uvm_swap.c,v 1.166 2023/01/10 11:18:47 kettenis Exp $ */
 /*     $NetBSD: uvm_swap.c,v 1.40 2000/11/17 11:39:39 mrg Exp $        */
 
 /*
@@ -215,7 +215,7 @@ LIST_HEAD(swap_priority, swappri);
 struct swap_priority swap_priority;    /* [S] */
 
 /* locks */
-struct mutex uvm_swap_data_lock = MUTEX_INITIALIZER(IPL_NONE);
+struct mutex uvm_swap_data_lock = MUTEX_INITIALIZER(IPL_MPFLOOR);
 struct rwlock swap_syscall_lock = RWLOCK_INITIALIZER("swplk");
 
 struct mutex oommtx = MUTEX_INITIALIZER(IPL_VM);