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Date: Mon, 11 Sep 2017 16:25:17 +0800
From: Dave Young <dyoung@redhat.com>
To: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: catalin.marinas@arm.com, will.deacon@arm.com,
        bauerman@linux.vnet.ibm.com, dhowells@redhat.com, vgoyal@redhat.com,
        herbert@gondor.apana.org.au, davem@davemloft.net,
        akpm@linux-foundation.org, mpe@ellerman.id.au, bhe@redhat.com,
        arnd@arndb.de, ard.biesheuvel@linaro.org, kexec@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 6/9] arm64: kexec_file: load initrd, device-tree and
 purgatory segments
Message-ID: <20170911082517.GA25352@dhcp-128-65.nay.redhat.com>
References: <20170908031616.17916-1-takahiro.akashi@linaro.org>
 <20170908031616.17916-7-takahiro.akashi@linaro.org>
 <20170911064754.GA7332@dhcp-128-65.nay.redhat.com>
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> > +int arch_kimage_file_post_load_cleanup(struct kimage *image)
> > +{
> > +	vfree(image->arch.dtb_buf);
> > +	image->arch.dtb_buf = NULL;
> > +
> > +	vfree(image->arch.elf_headers);
> > +	image->arch.elf_headers = NULL;
> > +	image->arch.elf_headers_sz = 0;
> > +
> > +	if (!image->fops || !image->fops->cleanup)
> > +		return 0;
> > +
> > +	return image->fops->cleanup(image->image_loader_data);
> > +}
> > +
> > +#ifdef CONFIG_KEXEC_VERIFY_SIG
> > +int arch_kexec_kernel_verify_sig(struct kimage *image, void *kernel,
> > +				 unsigned long kernel_len)
> > +{
> > +	if (!image->fops || !image->fops->verify_sig) {
> > +		pr_debug("kernel loader does not support signature verification.\n");
> > +		return -EKEYREJECTED;
> > +	}
> > +
> > +	return image->fops->verify_sig(kernel, kernel_len);
> > +}
> 
> 
> arch_kexec_kernel_verify_sig now be duplicated so it can be put in the
> general function in kexec_file.c
> 
> Also the probe and load function are also duplicated, they can be moved
> to common code as well.
> 
> The x86 load function can be cleaned up with removing the vfree
> callback.
> 
> ---
>  arch/x86/kernel/machine_kexec_64.c |    3 ---
>  1 file changed, 3 deletions(-)
> 
> --- linux-x86.orig/arch/x86/kernel/machine_kexec_64.c
> +++ linux-x86/arch/x86/kernel/machine_kexec_64.c
> @@ -384,9 +384,6 @@ int arch_kexec_kernel_image_probe(struct
>  
>  void *arch_kexec_kernel_image_load(struct kimage *image)
>  {
> -	vfree(image->arch.elf_headers);
> -	image->arch.elf_headers = NULL;
> -

Hmm, should move above to arch_kimage_file_post_load_cleanup instead.. 

>  	if (!image->fops || !image->fops->load)
>  		return ERR_PTR(-ENOEXEC);
>  
> 


Thanks
Dave