[PATCH 2/2] kexec: log the task that initiated the kexec reboot

[Bradley Morgan <include@grrlz.net>]

From: Bradley Morgan <brads@mainlining.org>

Give the kexec path the same treatment as the reboot syscall.

Log the comm and pid of the calling task after kexec_in_progress is set
to true but before kernel_restart_prepare() shuts down devices, so the
message survives even if device shutdown hangs, e.g:

  reboot: initiated by systemd-shutdow[1]
  kexec: Starting new kernel

The existing "Starting new kernel" line is left untouched, so anything
parsing dmesg today keeps working.

Signed-off-by: Bradley Morgan <brads@mainlining.org>
---
 kernel/kexec_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index dc770b9a6d05..d940b0c29f86 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1189,6 +1189,7 @@ int kernel_kexec(void)
 #endif
 	{
 		kexec_in_progress = true;
+		reboot_log_initiator();
 		kernel_restart_prepare("kexec reboot");
 		migrate_to_reboot_cpu();
 		syscore_shutdown();
-- 
2.47.3