With Alfred's permission, remove vm_mtx in favor of a fine-grained approach

(this commit is just the first stage).  Also add various GIANT_ macros to
formalize the removal of Giant, making it easy to test in a more piecemeal
fashion. These macros will allow us to test fine-grained locks to a degree
before removing Giant, and also after, and to remove Giant in a piecemeal
fashion via sysctl's on those subsystems which the authors believe can
operate without Giant.

1 files changed, 0 insertions, 6 deletions

diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c
index ce8301a..cec1997 100644
--- a/sys/vm/vm_init.c
+++ b/sys/vm/vm_init.c
@@ -97,20 +97,15 @@ SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL)
  *	The start and end address of physical memory is passed in.
  */
 
-struct mtx vm_mtx;
-
 /* ARGSUSED*/
 static void
 vm_mem_init(dummy)
 	void *dummy;
 {
-
 	/*
 	 * Initializes resident memory structures. From here on, all physical
 	 * memory is accounted for, and we use only virtual addresses.
 	 */
-	mtx_init(&vm_mtx, "vm", MTX_DEF);
-	mtx_lock(&vm_mtx);
 	vm_set_page_size();
 	virtual_avail = vm_page_startup(avail_start, avail_end, virtual_avail);
 	
@@ -123,5 +118,4 @@ vm_mem_init(dummy)
 	kmem_init(virtual_avail, virtual_end);
 	pmap_init(avail_start, avail_end);
 	vm_pager_init();
-	mtx_unlock(&vm_mtx);
 }