[PATCH V2 2/2] kexec: split kexec_load syscall from kexec core code
vgoyal at redhat.com
Tue Jul 21 06:03:08 PDT 2015
On Mon, Jul 20, 2015 at 04:37:15PM +0800, dyoung at redhat.com wrote:
> Now there's two kexec load syscall, one is kexec_load another is
> kexec_file_load, kexec_file_load has been splited as kernel/kexec_file.c.
> In this patch I split kexec_load syscall code to kernel/kexec.c.
Nice work. Thanks for doing this. I have couple of minor comments.
- We might have to audit kernel/kexec_core.c. I think there are some
functions in there which are used by only old syscall and not the new
one. All that code should be in kernel/kexec.c. Only the code which is
shared between two syscalls should be in kernel/kexec_core.c.
For example, I think kimage_alloc_init() is used by old syscall only.
New syscall uses kimage_file_alloc_init().
> --- linux.orig/include/linux/kexec.h
> +++ linux/include/linux/kexec.h
> @@ -16,7 +16,7 @@
> #include <uapi/linux/kexec.h>
> -#ifdef CONFIG_KEXEC
> +#ifdef CONFIG_KEXEC_CORE
> #include <linux/list.h>
> #include <linux/linkage.h>
> #include <linux/compat.h>
> @@ -318,12 +318,18 @@ int crash_shrink_memory(unsigned long ne
> size_t crash_get_memory_size(void);
> void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
> -#else /* !CONFIG_KEXEC */
> +#ifdef CONFIG_KEXEC
> +int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
> + unsigned long nr_segments,
> + struct kexec_segment __user *segments,
> + unsigned long flags);
I am wondering why this needs to be in kexec.h. Who needs this? Even if
somebody needs this, this should probably be outside of KEXEC_CORE.
int kimage_alloc_init(struct kimage **rimage, unsigned long entry,....
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