+ mm-page_owner-use-kstrtobool-to-parse-bool-option.patch added to -mm tree

+ mm-page_owner-use-kstrtobool-to-parse-bool-option.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: page_owner: use kstrtobool() to parse bool option
has been added to the -mm tree.  Its filename is
     mm-page_owner-use-kstrtobool-to-parse-bool-option.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-page_owner-use-kstrtobool-to-parse-bool-option.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_owner-use-kstrtobool-to-parse-bool-option.patch

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------------------------------------------------------
From: Sergei Trofimovich <slyfox@gentoo.org>
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/20210401210909.3532086-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

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

--- 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);
 
_

Patches currently in -mm which might be from slyfox@gentoo.org are

ia64-fix-user_stack_pointer-for-ptrace.patch
ia64-drop-unused-ia64_fw_emu-ifdef.patch
ia64-simplify-code-flow-around-swiotlb-init.patch
ia64-fix-efi_debug-build.patch
ia64-mca-always-make-ia64_mca_debug-an-expression.patch
mm-page_owner-fetch-backtrace-only-for-tracked-pages.patch
mm-page_owner-use-kstrtobool-to-parse-bool-option.patch
mm-page_alloc-ignore-init_on_free=1-for-debug_pagealloc=1.patch