linux-kernel - Re: [PATCH v2 4/4] kexec_file: Fix the issue of mismatch between loop variable types

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Message-ID: <aQq/CHi10ihT8/sn@MiWiFi-R3L-srv>
Date: Wed, 5 Nov 2025 11:05:44 +0800
From: Baoquan He <bhe@...hat.com>
To: Qiang Ma <maqianga@...ontech.com>
Cc: akpm@...ux-foundation.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/4] kexec_file: Fix the issue of mismatch between
 loop variable types

On 11/03/25 at 02:34pm, Qiang Ma wrote:
> The type of the struct kimage member variable nr_segments is unsigned long.
> Correct the loop variable i and the print format specifier type.

I can't see what's meaningful with this change. nr_segments is unsigned
long, but it's the range 'i' will loop. If so, we need change all for
loop of the int iterator.

> 
> Signed-off-by: Qiang Ma <maqianga@...ontech.com>
> ---
>  kernel/kexec_file.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
> index 4a24aadbad02..7afdaa0efc50 100644
> --- a/kernel/kexec_file.c
> +++ b/kernel/kexec_file.c
> @@ -366,7 +366,8 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
>  	int image_type = (flags & KEXEC_FILE_ON_CRASH) ?
>  			 KEXEC_TYPE_CRASH : KEXEC_TYPE_DEFAULT;
>  	struct kimage **dest_image, *image;
> -	int ret = 0, i;
> +	int ret = 0;
> +	unsigned long i;
>  
>  	/* We only trust the superuser with rebooting the system. */
>  	if (!kexec_load_permitted(image_type))
> @@ -432,7 +433,7 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
>  		struct kexec_segment *ksegment;
>  
>  		ksegment = &image->segment[i];
> -		kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n",
> +		kexec_dprintk("segment[%lu]: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n",
>  			      i, ksegment->buf, ksegment->bufsz, ksegment->mem,
>  			      ksegment->memsz);
>  
> -- 
> 2.20.1
>