x86: Fix panic when handling "mem={invalid}" param
commit 77eed821 upstream. Avoid removing all of memory and panicing when "mem={invalid}" is specified, e.g. mem=blahblah, mem=0, or mem=nopentium (on platforms other than x86_32). Signed-off-by: Kamal Mostafa <kamal@canonical.com> BugLink: http://bugs.launchpad.net/bugs/553464 Cc: Yinghai Lu <yinghai@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> LKML-Reference: <1296783486-23033-1-git-send-email-kamal@canonical.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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