[037/178] mm: page_owner: use kstrtobool() to parse bool option

Commit Message

Andrew Morton April 30, 2021, 5:55 a.m. UTC

From: Sergei Trofimovich <[e-mail]>
Subject: mm: page_owner: use kstrtobool() to parse bool option

I tried to use page_owner=1 for a while noticed too late it had no effect
as opposed to similar init_on_alloc=1 (these work).

Let's make them consistent.

The change decreses binary size slightly:
   text    data     bss     dec     hex filename
  12408     321      17   12746    31ca mm/page_owner.o.before
  12320     321      17   12658    3172 mm/page_owner.o.after

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Sergei Trofimovich <[e-mail]>
Reviewed-by: Matthew Wilcox (Oracle) <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/page_owner.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

Patch

--- a/mm/page_owner.c~mm-page_owner-use-kstrtobool-to-parse-bool-option
+++ a/mm/page_owner.c
@@ -42,13 +42,7 @@  static void init_early_allocated_pages(v
 
 static int __init early_page_owner_param(char *buf)
 {
-	if (!buf)
-		return -EINVAL;
-
-	if (strcmp(buf, "on") == 0)
-		page_owner_enabled = true;
-
-	return 0;
+	return kstrtobool(buf, &page_owner_enabled);
 }
 early_param("page_owner", early_page_owner_param);