linux-kernel - Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in kernel kexec

Open Source and information security mailing list archives

Date:	Wed, 4 Dec 2013 09:35:29 +0800
From:	Baoquan He <bhe@...hat.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	mjg59@...f.ucam.org, greg@...ah.com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, ebiederm@...ssion.com, hpa@...or.com
Subject: Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in
 kernel kexec

On 12/02/13 at 10:44am, Vivek Goyal wrote:
> On Fri, Nov 29, 2013 at 11:10:48AM +0800, Baoquan He wrote:
> 
> [..]
> > > +void *arch_kexec_kernel_image_load(struct kimage *image, char *kernel,
> > > +			unsigned long kernel_len, char *initrd,
> > > +			unsigned long initrd_len, char *cmdline,
> > > +			unsigned long cmdline_len)
> > > +{
> > > +	int idx = image->file_handler_idx;
> > > +
> > > +	if (idx < 0)
> > > +		return ERR_PTR(-ENOEXEC);
> > > +
> > > +	return kexec_file_type[idx].load(image, kernel, kernel_len, initrd,
> > > +					initrd_len, cmdline, cmdline_len);
> > > +}
> > > +
> > > +int arch_image_file_post_load_cleanup(struct kimage *image)
> > > +{
> > 
> > Hi Vivek,
> > 
> > This function is defined as one of arch specific fucntion set, why don't
> > we name it in a unified prefix as others.
> 
> I am using "arch_" prefix. What else to use?

I mean in this function series, other functions have name like
arch_kexec_kernel_image_xxx, why this function is lonely, and is named
as arch_kimage_xxx. And here what does the 'k' mean in "kimage", kexec
image or kernel image, I am confused.

> 
> > 
> > And name of the default dummy function in kernel/kexec.c is not consistent
> > with the arch specific one, so currently
> > arch_image_file_post_load_cleanup of x86 arch is not called. Please
> > consider wihch one need be changed.
> 
> Good catch Bao. I should change arch_image_file_post_load_cleanup() to
> arch_kimage_file_post_load_cleanup(), otherwise it never gets called and
> memory leaks.
> 
> Thanks
> Vivek
> 
> _______________________________________________
> kexec mailing list
> kexec@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
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