From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Tue, 28 Feb 2023 15:34:38 +0000 (+0300)
Subject: mm: uninline kstrdup()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2a6772ebf05a9b6bc450e42bbb459f6327f68aca;p=linux.git

mm: uninline kstrdup()

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@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/util.c b/mm/util.c
index b8ed9dbc7fd55..dd12b9531ac4c 100644
--- a/mm/util.c
+++ b/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;