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7c321eb2b8
When the crashkernel kernel command line option is specified, the low 1M memory will always be reserved now. Therefore, it's not necessary to create a backup region anymore and also no need to copy the contents of the first 640k to it. Remove all the code related to handling that backup region. [ bp: Massage commit message. ] Signed-off-by: Lianbo Jiang <lijiang@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: bhe@redhat.com Cc: Dave Young <dyoung@redhat.com> Cc: d.hatayama@fujitsu.com Cc: dhowells@redhat.com Cc: ebiederm@xmission.com Cc: horms@verge.net.au Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jürgen Gross <jgross@suse.com> Cc: kexec@lists.infradead.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: vgoyal@redhat.com Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20191108090027.11082-3-lijiang@redhat.com |
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