Adjust comments referencing vm_mem_init()

I cannot find a time where the function was not named this.

Reviewed by:	kib, markj
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D45383

(cherry picked from commit deab57178f0b06eab56d7811674176985a8ea98d)

sys/amd64/amd64/pmap.c

@@ -1611,8 +1611,8 @@ nkpt_init(vm_paddr_t addr)
 	 * Secondly, device memory mapped as part of setting up the low-
 	 * level console(s) is taken from KVA, starting at virtual_avail.
 	 * This is because cninit() is called after pmap_bootstrap() but
-	 * before vm_init() and pmap_init(). 20MB for a frame buffer is
-	 * not uncommon.
+	 * before vm_mem_init() and pmap_init(). 20MB for a frame buffer
+	 * is not uncommon.
 	 */
 	pt_pages += 32;		/* 64MB additional slop. */
 #endif
@@ -2451,7 +2451,8 @@ pmap_init_pv_table(void)
 
 /*
  *	Initialize the pmap module.
- *	Called by vm_init, to initialize any structures that the pmap
+ *
+ *	Called by vm_mem_init(), to initialize any structures that the pmap
  *	system needs to map virtual memory.
  */
 void

sys/arm/arm/pmap-v6.c

@@ -1707,8 +1707,9 @@ pmap_pt2pg_init(pmap_t pmap, vm_offset_t va, vm_page_t m)
 
 /*
  *  Initialize the pmap module.
- *  Called by vm_init, to initialize any structures that the pmap
- *  system needs to map virtual memory.
+ *
+ *  Called by vm_mem_init(), to initialize any structures that the pmap system
+ *  needs to map virtual memory.
  */
 void
 pmap_init(void)

sys/arm64/arm64/pmap.c

@@ -1536,7 +1536,8 @@ pmap_init_pv_table(void)
 
 /*
  *	Initialize the pmap module.
- *	Called by vm_init, to initialize any structures that the pmap
+ *
+ *	Called by vm_mem_init(), to initialize any structures that the pmap
  *	system needs to map virtual memory.
  */
 void

sys/i386/i386/pmap.c

@@ -962,7 +962,8 @@ pmap_ptelist_init(vm_offset_t *head, void *base, int npages)
 
 /*
  *	Initialize the pmap module.
- *	Called by vm_init, to initialize any structures that the pmap
+ *
+ *	Called by vm_mem_init(), to initialize any structures that the pmap
  *	system needs to map virtual memory.
  */
 static void

sys/kern/kern_malloc.c

@@ -1268,7 +1268,8 @@ malloc_init(void *data)
 	struct malloc_type_internal *mtip;
 	struct malloc_type *mtp;
 
-	KASSERT(vm_cnt.v_page_count != 0, ("malloc_register before vm_init"));
+	KASSERT(vm_cnt.v_page_count != 0,
+	    ("malloc_init() called before vm_mem_init()"));
 
 	mtp = data;
 	if (mtp->ks_version != M_VERSION)

sys/powerpc/booke/pmap.c

@@ -1050,8 +1050,9 @@ mmu_booke_kextract(vm_offset_t va)
 
 /*
  * Initialize the pmap module.
- * Called by vm_init, to initialize any structures that the pmap
- * system needs to map virtual memory.
+ *
+ * Called by vm_mem_init(), to initialize any structures that the pmap system
+ * needs to map virtual memory.
  */
 static void
 mmu_booke_init(void)

sys/riscv/riscv/pmap.c

@@ -760,7 +760,8 @@ pmap_page_init(vm_page_t m)
 
 /*
  *	Initialize the pmap module.
- *	Called by vm_init, to initialize any structures that the pmap
+ *
+ *	Called by vm_mem_init(), to initialize any structures that the pmap
  *	system needs to map virtual memory.
  */
 void

sys/vm/vm_init.c

@@ -104,7 +104,7 @@ static void vm_mem_init(void *);
 SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL);
 
 /*
- *	vm_init initializes the virtual memory system.
+ *	vm_mem_init() initializes the virtual memory system.
  *	This is done only by the first cpu up.
  */
 static void