+ mm-improve-the-execution-efficiency-of-early_ioremap_setup.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-improve-the-execution-efficiency-of-early_ioremap_setup.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-improve-the-execution-efficiency-of-early_ioremap_setup.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Liam Ni <zhiguangni01@gmail.com>
Subject: mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
Date: Sat, 3 Jun 2023 10:31:16 +0800

Reduce the number of invalid loops of the function early_ioremap_setup()
to improve the efficiency of function execution

Link: https://lkml.kernel.org/r/CACZJ9cU6t5sLoDwE6_XOg+UJLpZt4+qHfjYN2bA0s+3y9y6pQQ@mail.gmail.com
Signed-off-by: LiamNi <zhiguangni01@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/early_ioremap.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/mm/early_ioremap.c~mm-improve-the-execution-efficiency-of-early_ioremap_setup
+++ a/mm/early_ioremap.c
@@ -72,12 +72,10 @@ void __init early_ioremap_setup(void)
 {
 	int i;
 
-	for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
-		if (WARN_ON(prev_map[i]))
-			break;
-
-	for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+	for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+		WARN_ON_ONCE(prev_map[i]);
 		slot_virt[i] = __fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);
+	}
 }
 
 static int __init check_early_ioremap_leak(void)
_

Patches currently in -mm which might be from zhiguangni01@gmail.com are

mm-improve-the-execution-efficiency-of-early_ioremap_setup.patch