[PATCH] kexec: check if memory is reserved only when loading kdump kernel.

[Simon Horman]

On Tue, May 14, 2013 at 06:32:50PM +0800, WANG Chao wrote:
> When memory for crashkernel isn't reserved, it's confusing that kexec
> spits error message for unloading kdump kernel as if we were loading it:
> 
>   # kexec -p -u
>   Memory for crashkernel is not reserved
>   Please reserve memory by passing "crashkernel=X at Y" parameter to the kernel
>   Then try loading kdump kernel
>   # echo $?
>   1
> 
> It's more appropriate to test if memory is reserved only when
> loading kdump kernel. With this patch:
> 
>   # kexec -p -u
>   # echo $?
>   0
> 
> It's also the same behavior with the case of trying to unload kernel
> from unloaded state.
> 
> Signed-off-by: WANG Chao <chaowang at redhat.com>

Thanks, applied.