[PATCH 05/13] kexec: Make kexec_segment user buffer pointer a union

Borislav Petkov bp at alien8.de
Wed Jun 4 03:34:23 PDT 2014

On Tue, Jun 03, 2014 at 09:06:54AM -0400, Vivek Goyal wrote:
> So far kexec_segment->buf was always a user space pointer as user space
> passed the array of kexec_segment structures and kernel copied it.
> But with new system call, list of kexec segments will be prepared by
> kernel and kexec_segment->buf will point to a kernel memory.
> So while I was adding code where I made assumption that ->buf is pointing
> to kernel memory, sparse started giving warning.
> Make ->buf a union. And where a user space pointer is expected, access
> it using ->buf and where a kernel space pointer is expected, access it
> using ->kbuf. That takes care of sparse warnings.
> Signed-off-by: Vivek Goyal <vgoyal at redhat.com>

Acked-by: Borislav Petkov <bp at suse.de>


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