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mm: uninline kstrdup()

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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>
This commit is contained in:
Alexey Dobriyan 2023-02-28 18:34:38 +03:00 committed by Andrew Morton
parent 6d51363d53
commit 2a6772ebf0
1 changed files with 1 additions and 0 deletions
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mm/util.c
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@ -49,6 +49,7 @@ EXPORT_SYMBOL(kfree_const);
* *
* Return: newly allocated copy of @s or %NULL in case of error * Return: newly allocated copy of @s or %NULL in case of error
*/ */
noinline
char *kstrdup(const char *s, gfp_t gfp) char *kstrdup(const char *s, gfp_t gfp)
{ {
size_t len; size_t len;