[PATCH 1/1] crypto: fips: annotate fips_enable() with __init to free init memory after boot

[PATCH 1/1] crypto: fips: annotate fips_enable() with __init to free init memory after boot

[Can Peng]

The fips_enable() function is only invoked early during kernel boot via the
__setup() macro ("fips=" command line parameter), and is never used again
after initialization completes.

Annotating it with __init places the function in the .init.text section,
allowing the kernel to free its memory after init (when freeing_initmem()
runs), reducing runtime memory footprint.

This is a standard practice for setup/early-parse functions and has no
functional impact — the parsing logic, return values, and fips mode
setting behavior remain unchanged.

Signed-off-by: Can Peng <pengcan@kylinos.cn>
---
 crypto/fips.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/fips.c b/crypto/fips.c
index 65d2bc070a26..c59711248d95 100644
--- a/crypto/fips.c
+++ b/crypto/fips.c
@@ -22,7 +22,7 @@ ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
 EXPORT_SYMBOL_GPL(fips_fail_notif_chain);
 
 /* Process kernel command-line parameter at boot time. fips=0 or fips=1 */
-static int fips_enable(char *str)
+static int __init fips_enable(char *str)
 {
 	if (kstrtoint(str, 0, &fips_enabled))
 		return 0;
-- 
2.25.1

Re: [PATCH 1/1] crypto: fips: annotate fips_enable() with __init to free init memory after boot

[Herbert Xu]

On Mon, Dec 08, 2025 at 05:50:10PM +0800, Can Peng wrote:
> The fips_enable() function is only invoked early during kernel boot via the
> __setup() macro ("fips=" command line parameter), and is never used again
> after initialization completes.
> 
> Annotating it with __init places the function in the .init.text section,
> allowing the kernel to free its memory after init (when freeing_initmem()
> runs), reducing runtime memory footprint.
> 
> This is a standard practice for setup/early-parse functions and has no
> functional impact — the parsing logic, return values, and fips mode
> setting behavior remain unchanged.
> 
> Signed-off-by: Can Peng <pengcan@kylinos.cn>
> ---
>  crypto/fips.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt