• Vivek Goyal's avatar
    kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE · 57cac4d1
    Vivek Goyal authored
    o elfcorehdr_addr is used by not only the code under CONFIG_PROC_VMCORE
      but also by the code which is not inside CONFIG_PROC_VMCORE.  For
      example, is_kdump_kernel() is used by powerpc code to determine if
      kernel is booting after a panic then use previous kernel's TCE table.
      So even if CONFIG_PROC_VMCORE is not set in second kernel, one should be
      able to correctly determine that we are booting after a panic and setup
      calgary iommu accordingly.
    
    o So remove the assumption that elfcorehdr_addr is under
      CONFIG_PROC_VMCORE.
    
    o Move definition of elfcorehdr_addr to arch dependent crash files.
      (Unfortunately crash dump does not have an arch independent file
      otherwise that would have been the best place).
    
    o kexec.c is not the right place as one can Have CRASH_DUMP enabled in
      second kernel without KEXEC being enabled.
    
    o I don't see sh setup code parsing the command line for
      elfcorehdr_addr.  I am wondering how does vmcore interface work on sh.
      Anyway, I am atleast defining elfcoredhr_addr so that compilation is not
      broken on sh.
    Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
    Acked-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    Acked-by: default avatarSimon Horman <horms@verge.net.au>
    Acked-by: default avatarPaul Mundt <lethal@linux-sh.org>
    Cc: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    57cac4d1
crash_dump.c 1.4 KB