The patch titled
Subject: mm: uninline kstrdup()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
mm-uninline-kstrdup.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-uninline-kstrdup.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: mm: uninline kstrdup()
Date: Tue, 28 Feb 2023 18:34:38 +0300
gcc inlines kstrdup into kstrdup_const() but it can very efficiently tail
call into it instead:
$ ./scripts/bloat-o-meter ../vmlinux-000 ../obj/vmlinux
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-84 (-84)
Function old new delta
kstrdup_const 119 35 -84
Link: https://lkml.kernel.org/r/Y/4fDlbIhTLNLFHz@p183
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/util.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/util.c~mm-uninline-kstrdup
+++ a/mm/util.c
@@ -49,6 +49,7 @@ EXPORT_SYMBOL(kfree_const);
*
* Return: newly allocated copy of @s or %NULL in case of error
*/
+noinline
char *kstrdup(const char *s, gfp_t gfp)
{
size_t len;
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
mm-uninline-kstrdup.patch
