linux-kernel - Re: [PATCH] staging: rtl8723bs: use kzalloc directly in _rtw

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Message-ID: <aXHBm-HRYuV8QH4r@stanley.mountain>
Date: Thu, 22 Jan 2026 09:20:11 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Minu Jin <s9430939@...er.com>
Cc: gregkh@...uxfoundation.org, linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723bs: use kzalloc directly in _rtw_zmalloc

On Tue, Jan 20, 2026 at 02:40:36PM +0900, Minu Jin wrote:
> Replace kmalloc + memset with kzalloc for simpler and cleaner code.
> 
> Signed-off-by: Minu Jin <s9430939@...er.com>
> ---
>  drivers/staging/rtl8723bs/os_dep/osdep_service.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/rtl8723bs/os_dep/osdep_service.c b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> index a00f9f0c85c5..be46132a533a 100644
> --- a/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> +++ b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> @@ -24,12 +24,7 @@ void *_rtw_malloc(u32 sz)
>  
>  void *_rtw_zmalloc(u32 sz)
>  {
> -	void *pbuf = _rtw_malloc(sz);
> -
> -	if (pbuf)
> -		memset(pbuf, 0, sz);
> -
> -	return pbuf;
> +	return kzalloc(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);

This in_interrupt() is garbage.  We should use GFP_ATOMIC if we
are in an interrupt handler or if holding a spinlock.  The right
thing to do is review all the callers and figure out whether
GFP_ATOMIC or GFP_KERNEL is appropriate.

regards,
dan carpenter