在 2025/10/31 03:20, kernel test robot 写道:
Hi Qiang,
kernel test robot noticed the following build warnings:
[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.18-rc3 next-20251030]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url:
https://github.com/intel-lab-lkp/linux/commits/Qiang-Ma/kexec-print-out-debugging-message-if-required-for-kexec_load/20251030-153807
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
mm-everything
patch link:
https://lore.kernel.org/r/20251030073316.529106-1-maqianga%40uniontech.com
patch subject: [PATCH] kexec: print out debugging message if required for
kexec_load
config: x86_64-kexec
(https://download.01.org/0day-ci/archive/20251031/[email protected]/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project
87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build):
(https://download.01.org/0day-ci/archive/20251031/[email protected]/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes:
https://lore.kernel.org/oe-kbuild-all/[email protected]/
ok.
All warnings (new ones prefixed by >>):
kernel/kexec.c:160:10: warning: format specifies type 'int' but the argument
has type 'unsigned long' [-Wformat]
159 | kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx
mem=0x%lx memsz=0x%zx\n",
| ~~
| %lu
160 | i, ksegment->buf, ksegment->bufsz,
ksegment->mem,
| ^
include/linux/kexec.h:531:55: note: expanded from macro 'kexec_dprintk'
531 | do { if (kexec_file_dbg_print) pr_info(fmt, ##arg); } while
(0)
| ~~~ ^~~
include/linux/printk.h:585:34: note: expanded from macro 'pr_info'
585 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
| ~~~ ^~~~~~~~~~~
include/linux/printk.h:512:60: note: expanded from macro 'printk'
512 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt,
##__VA_ARGS__)
| ~~~
^~~~~~~~~~~
include/linux/printk.h:484:19: note: expanded from macro 'printk_index_wrap'
484 | _p_func(_fmt, ##__VA_ARGS__);
\
| ~~~~ ^~~~~~~~~~~
1 warning generated.
Yes, this is an type mismatch, will fix and update in new post, thanks.
vim +160 kernel/kexec.c
141
142 ret = machine_kexec_prepare(image);
143 if (ret)
144 goto out;
145
146 /*
147 * Some architecture(like S390) may touch the crash memory
before
148 * machine_kexec_prepare(), we must copy vmcoreinfo data after
it.
149 */
150 ret = kimage_crash_copy_vmcoreinfo(image);
151 if (ret)
152 goto out;
153
154 kexec_dprintk("nr_segments = %lu\n", image->nr_segments);
155 for (i = 0; i < nr_segments; i++) {
156 struct kexec_segment *ksegment;
157
158 ksegment = &image->segment[i];
159 kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx mem=0x%lx
memsz=0x%zx\n",
> 160 i, ksegment->buf, ksegment->bufsz,
ksegment->mem,
161 ksegment->memsz);
162
163 ret = kimage_load_segment(image, i);
164 if (ret)
165 goto out;
166 }
167
168 kimage_terminate(image);
169
170 ret = machine_kexec_post_load(image);
171 if (ret)
172 goto out;
173
174 kexec_dprintk("kexec_file_load: type:%u, start:0x%lx head:0x%lx
flags:0x%lx\n",
175 image->type, image->start, image->head, flags);
176
177 /* Install the new kernel and uninstall the old */
178 image = xchg(dest_image, image);
179
180 out:
181 #ifdef CONFIG_CRASH_DUMP
182 if ((flags & KEXEC_ON_CRASH) && kexec_crash_image)
183 arch_kexec_protect_crashkres();
184 #endif
185
186 kimage_free(image);
187 out_unlock:
188 kexec_unlock();
189 return ret;
190 }
191
