purgatory_backup_sz 18 arch/x86/include/asm/purgatory.h extern unsigned long purgatory_backup_sz; purgatory_backup_sz 19 arch/x86/purgatory/purgatory.c unsigned long purgatory_backup_sz __section(.kexec-purgatory); purgatory_backup_sz 34 arch/x86/purgatory/purgatory.c (void *)purgatory_backup_src, purgatory_backup_sz);