mm: convert some level-less printks to pr_*

printk is meant to be used with an associated log level.  There are some
instances of printk scattered around the mm code where the log level is
missing.  Add a log level and adhere to suggestions by
scripts/checkpatch.pl by moving to the pr_* macros.

Also add the typical pr_fmt definition so that print statements can be
easily traced back to the modules where they occur, correlated one with
another, etc.  This will require the removal of some (now redundant)
prefixes on a few print statements.
Signed-off-by: NMitchel Humpherys <mitchelh@codeaurora.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

block/bounce.c

@@ -3,6 +3,8 @@
  * - Split from highmem.c
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/mm.h>
 #include <linux/export.h>
 #include <linux/swap.h>
@@ -15,6 +17,7 @@
 #include <linux/hash.h>
 #include <linux/highmem.h>
 #include <linux/bootmem.h>
+#include <linux/printk.h>
 #include <asm/tlbflush.h>
 
 #include <trace/events/block.h>
@@ -34,7 +37,7 @@ static __init int init_emergency_pool(void)
 
 	page_pool = mempool_create_page_pool(POOL_SIZE, 0);
 	BUG_ON(!page_pool);
-	printk("bounce pool size: %d pages\n", POOL_SIZE);
+	pr_info("pool size: %d pages\n", POOL_SIZE);
 
 	return 0;
 }
@@ -86,7 +89,7 @@ int init_emergency_isa_pool(void)
 				       mempool_free_pages, (void *) 0);
 	BUG_ON(!isa_page_pool);
 
-	printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
+	pr_info("isa pool size: %d pages\n", ISA_POOL_SIZE);
 	return 0;
 }
 

mm/mempolicy.c

@@ -65,6 +65,8 @@
    kernel is not always grateful with that.
 */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/mempolicy.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
@@ -91,6 +93,7 @@
 #include <linux/ctype.h>
 #include <linux/mm_inline.h>
 #include <linux/mmu_notifier.h>
+#include <linux/printk.h>
 
 #include <asm/tlbflush.h>
 #include <asm/uaccess.h>
@@ -2645,7 +2648,7 @@ void __init numa_policy_init(void)
 		node_set(prefer, interleave_nodes);
 
 	if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes))
-		printk("numa_policy_init: interleaving failed\n");
+		pr_err("%s: interleaving failed\n", __func__);
 
 	check_numabalancing_enable();
 }

mm/mmap.c

@@ -6,6 +6,8 @@
  * Address space accounting code	<alan@lxorguk.ukuu.org.uk>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/backing-dev.h>
@@ -37,6 +39,7 @@
 #include <linux/sched/sysctl.h>
 #include <linux/notifier.h>
 #include <linux/memory.h>
+#include <linux/printk.h>
 
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
@@ -361,20 +364,20 @@ static int browse_rb(struct rb_root *root)
 		struct vm_area_struct *vma;
 		vma = rb_entry(nd, struct vm_area_struct, vm_rb);
 		if (vma->vm_start < prev) {
-			printk("vm_start %lx prev %lx\n", vma->vm_start, prev);
+			pr_info("vm_start %lx prev %lx\n", vma->vm_start, prev);
 			bug = 1;
 		}
 		if (vma->vm_start < pend) {
-			printk("vm_start %lx pend %lx\n", vma->vm_start, pend);
+			pr_info("vm_start %lx pend %lx\n", vma->vm_start, pend);
 			bug = 1;
 		}
 		if (vma->vm_start > vma->vm_end) {
-			printk("vm_end %lx < vm_start %lx\n",
+			pr_info("vm_end %lx < vm_start %lx\n",
 				vma->vm_end, vma->vm_start);
 			bug = 1;
 		}
 		if (vma->rb_subtree_gap != vma_compute_subtree_gap(vma)) {
-			printk("free gap %lx, correct %lx\n",
+			pr_info("free gap %lx, correct %lx\n",
 			       vma->rb_subtree_gap,
 			       vma_compute_subtree_gap(vma));
 			bug = 1;
@@ -388,7 +391,7 @@ static int browse_rb(struct rb_root *root)
 	for (nd = pn; nd; nd = rb_prev(nd))
 		j++;
 	if (i != j) {
-		printk("backwards %d, forwards %d\n", j, i);
+		pr_info("backwards %d, forwards %d\n", j, i);
 		bug = 1;
 	}
 	return bug ? -1 : i;
@@ -423,17 +426,17 @@ static void validate_mm(struct mm_struct *mm)
 		i++;
 	}
 	if (i != mm->map_count) {
-		printk("map_count %d vm_next %d\n", mm->map_count, i);
+		pr_info("map_count %d vm_next %d\n", mm->map_count, i);
 		bug = 1;
 	}
 	if (highest_address != mm->highest_vm_end) {
-		printk("mm->highest_vm_end %lx, found %lx\n",
+		pr_info("mm->highest_vm_end %lx, found %lx\n",
 		       mm->highest_vm_end, highest_address);
 		bug = 1;
 	}
 	i = browse_rb(&mm->mm_rb);
 	if (i != mm->map_count) {
-		printk("map_count %d rb %d\n", mm->map_count, i);
+		pr_info("map_count %d rb %d\n", mm->map_count, i);
 		bug = 1;
 	}
 	BUG_ON(bug);
@@ -3280,7 +3283,7 @@ static struct notifier_block reserve_mem_nb = {
 static int __meminit init_reserve_notifier(void)
 {
 	if (register_hotmemory_notifier(&reserve_mem_nb))
-		printk("Failed registering memory add/remove notifier for admin reserve");
+		pr_err("Failed registering memory add/remove notifier for admin reserve\n");
 
 	return 0;
 }

mm/nommu.c

@@ -13,6 +13,8 @@
  *  Copyright (c) 2007-2010 Paul Mundt <lethal@linux-sh.org>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/export.h>
 #include <linux/mm.h>
 #include <linux/vmacache.h>
@@ -32,6 +34,7 @@
 #include <linux/syscalls.h>
 #include <linux/audit.h>
 #include <linux/sched/sysctl.h>
+#include <linux/printk.h>
 
 #include <asm/uaccess.h>
 #include <asm/tlb.h>
@@ -1246,7 +1249,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
 	return ret;
 
 enomem:
-	printk("Allocation of length %lu from process %d (%s) failed\n",
+	pr_err("Allocation of length %lu from process %d (%s) failed\n",
 	       len, current->pid, current->comm);
 	show_free_areas(0);
 	return -ENOMEM;

mm/vmscan.c

@@ -11,6 +11,8 @@
  *  Multiqueue VM started 5.8.00, Rik van Riel.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/gfp.h>
@@ -43,6 +45,7 @@
 #include <linux/sysctl.h>
 #include <linux/oom.h>
 #include <linux/prefetch.h>
+#include <linux/printk.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -480,7 +483,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
 		if (page_has_private(page)) {
 			if (try_to_free_buffers(page)) {
 				ClearPageDirty(page);
-				printk("%s: orphaned page\n", __func__);
+				pr_info("%s: orphaned page\n", __func__);
 				return PAGE_CLEAN;
 			}
 		}