[dwmw2:kexec-debug-6 5/7] arch/x86/kernel/early_printk.c:148:3: error: use of undeclared identifier 'kexec_debug_8250_port'

[David Woodhouse]

On Sat, 2025-01-25 at 09:38 +0800, kernel test robot wrote:
> 
>    In file included from arch/x86/kernel/early_printk.c:4:
>    In file included from include/linux/kexec.h:18:
>    In file included from include/linux/vmcore_info.h:6:
>    In file included from include/linux/elfcore.h:11:
>    In file included from include/linux/ptrace.h:10:
>    In file included from include/linux/pid_namespace.h:7:
>    In file included from include/linux/mm.h:2223:
>    include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
>      518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
>          |                               ~~~~~~~~~~~ ^ ~~~

I don't believe that one's mine.

> > > arch/x86/kernel/early_printk.c:148:3: error: use of undeclared identifier 'kexec_debug_8250_port'
>      148 |                 kexec_debug_8250_port = early_serial_base;
>          |                 ^
>    1 warning and 1 error generated.

That one is though; turns out I was allowing CONFIG_KEXEC_DEBUG to be
set without KEXEC_CORE.

Rolling this into the next revision:

--- a/kernel/Kconfig.kexec
+++ b/kernel/Kconfig.kexec
@@ -100,7 +100,7 @@ config KEXEC_JUMP
 
 config KEXEC_DEBUG
        bool "Debug kexec transition"
-       depends on HAVE_KEXEC_DEBUG
+       depends on HAVE_KEXEC_DEBUG && KEXEC_CORE
        help
          Faults during kexec can be difficult to debug. This installs exception
          handlers and attempts to report faults. On x86_64 this would use the


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