linux-kernel - [PATCH v3 3/3] kexec: print out debugging message if required for kexec

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Message-Id: <20251126084427.3222212-4-maqianga@uniontech.com>
Date: Wed, 26 Nov 2025 16:44:27 +0800
From: Qiang Ma <maqianga@...ontech.com>
To: akpm@...ux-foundation.org,
	bhe@...hat.com
Cc: kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Qiang Ma <maqianga@...ontech.com>,
	kernel test robot <lkp@...el.com>
Subject: [PATCH v3 3/3] kexec: print out debugging message if required for kexec_load

The commit a85ee18c7900 ("kexec_file: print out debugging message
if required") has added general code printing in kexec_file_load(),
but not in kexec_load().

As a result, when using '-d' for the kexec_load interface,
print nothing in the kernel space.

And print out type/start/head of kimage and flags to help debug.

Signed-off-by: Qiang Ma <maqianga@...ontech.com>
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202510310332.6XrLe70K-lkp@intel.com/
---
 kernel/kexec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index f6c58c767eb0..37e4ac8af9f3 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -166,6 +166,9 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
 	if (ret)
 		goto out;
 
+	kexec_dprintk("kexec_load: type:%u, start:0x%lx head:0x%lx flags:0x%lx\n",
+		      image->type, image->start, image->head, flags);
+
 	/* Install the new kernel and uninstall the old */
 	image = xchg(dest_image, image);
 
-- 
2.20.1