[PATCH] kexec: unmap reserved pages for each error-return way

[Andrew Morton]

On Wed, 27 Jan 2016 14:48:31 +0300 Dmitry Safonov <dsafonov at virtuozzo.com> wrote:

> For allocation of kimage failure or kexec_prepare or load segments
> errors there is no need to keep crashkernel memory mapped.
> It will affect only s390 as map/unmap hook defined only for it.
> As on unmap s390 also changes os_info structure let's check return code
> and add info only on success.
> 

This conflicts (both mechanically and somewhat conceptually) with
Xunlei Pang's "kexec: Introduce a protection mechanism for the
crashkernel reserved memory" and "kexec: provide
arch_kexec_protect(unprotect)_crashkres()".

http://ozlabs.org/~akpm/mmots/broken-out/kexec-introduce-a-protection-mechanism-for-the-crashkernel-reserved-memory.patch
http://ozlabs.org/~akpm/mmots/broken-out/kexec-introduce-a-protection-mechanism-for-the-crashkernel-reserved-memory-v4.patch

and

http://ozlabs.org/~akpm/mmots/broken-out/kexec-provide-arch_kexec_protectunprotect_crashkres.patch
http://ozlabs.org/~akpm/mmots/broken-out/kexec-provide-arch_kexec_protectunprotect_crashkres-v4.patch

so can we please sort all that out?