7:12 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
locking/jump_label
head: 8fb8d36194a6d1ac0ea7ae64a4044c203177828f
commit: db137d1c529ef853ec57d11e258e299804b8d599 [10/13] jump_label,x86: Emit short JMP
config: x86_64-randconfig-m001-20210318 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
#
https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?...
git remote add peterz-queue
https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
git fetch --no-tags peterz-queue locking/jump_label
git checkout db137d1c529ef853ec57d11e258e299804b8d599
# save the attached .config to linux build tree
make W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
arch/x86/kernel/jump_label.c: In function 'arch_jump_entry_size':
arch/x86/kernel/jump_label.c:23:9: error: variable 'insn' has initializer but
incomplete type
23 | struct insn insn = {};
| ^~~~
> arch/x86/kernel/jump_label.c:23:14: error: storage size of
'insn' isn't known
23 | struct insn insn = {};
| ^~~~
arch/x86/kernel/jump_label.c:25:2: error: implicit declaration of function
'insn_decode_kernel' [-Werror=implicit-function-declaration]
25 | insn_decode_kernel(&insn, (void *)jump_entry_code(entry));
| ^~~~~~~~~~~~~~~~~~
arch/x86/kernel/jump_label.c:23:14: warning: unused variable 'insn'
[-Wunused-variable]
23 | struct insn insn = {};
| ^~~~
arch/x86/kernel/jump_label.c:29:1: error: control reaches end of non-void function
[-Werror=return-type]
29 | }
| ^
cc1: some warnings being treated as errors
vim +23 arch/x86/kernel/jump_label.c
20
21 int arch_jump_entry_size(struct jump_entry *entry)
22 {
23 struct insn insn = {};
24
25 insn_decode_kernel(&insn, (void *)jump_entry_code(entry));
26 BUG_ON(insn.length != 2 && insn.length != 5);
27
28 return insn.length;
29 }
30
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org