From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: [peterz-queue:x86/static_call 13/18] arch/x86/kernel/static_call.c:38 __static_call_transform() error: uninitialized symbol 'code'.
Date: Wed, 19 Aug 2020 08:11:04 +0800 [thread overview]
Message-ID: <202008190801.t2HEzoVT%lkp@intel.com> (raw)
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CC: kbuild-all(a)lists.01.org
TO: Peter Zijlstra <peterz@infradead.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/static_call
head: 9c45f6868feeab595271da9e16633a48bffd7930
commit: c2406e1457f0ae2887ebf540d2658885fa7e8416 [13/18] static_call: Add static_call_cond()
:::::: branch date: 10 hours ago
:::::: commit date: 10 hours ago
config: x86_64-randconfig-m001-20200818 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
arch/x86/kernel/static_call.c:38 __static_call_transform() error: uninitialized symbol 'code'.
# https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=c2406e1457f0ae2887ebf540d2658885fa7e8416
git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
git fetch --no-tags peterz-queue x86/static_call
git checkout c2406e1457f0ae2887ebf540d2658885fa7e8416
vim +/code +38 arch/x86/kernel/static_call.c
c2406e1457f0ae Peter Zijlstra 2019-10-03 13
c2406e1457f0ae Peter Zijlstra 2019-10-03 14 static void __static_call_transform(void *insn, enum insn_type type, void *func)
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 15 {
c2406e1457f0ae Peter Zijlstra 2019-10-03 16 int size = CALL_INSN_SIZE;
c2406e1457f0ae Peter Zijlstra 2019-10-03 17 const void *code;
c2406e1457f0ae Peter Zijlstra 2019-10-03 18
c2406e1457f0ae Peter Zijlstra 2019-10-03 19 switch (type) {
c2406e1457f0ae Peter Zijlstra 2019-10-03 20 case CALL:
c2406e1457f0ae Peter Zijlstra 2019-10-03 21 code = text_gen_insn(CALL_INSN_OPCODE, insn, func);
c2406e1457f0ae Peter Zijlstra 2019-10-03 22 break;
c2406e1457f0ae Peter Zijlstra 2019-10-03 23
c2406e1457f0ae Peter Zijlstra 2019-10-03 24 case NOP:
c2406e1457f0ae Peter Zijlstra 2019-10-03 25 code = ideal_nops[NOP_ATOMIC5];
c2406e1457f0ae Peter Zijlstra 2019-10-03 26 break;
c2406e1457f0ae Peter Zijlstra 2019-10-03 27
c2406e1457f0ae Peter Zijlstra 2019-10-03 28 case JMP:
c2406e1457f0ae Peter Zijlstra 2019-10-03 29 code = text_gen_insn(JMP32_INSN_OPCODE, insn, func);
c2406e1457f0ae Peter Zijlstra 2019-10-03 30 break;
c2406e1457f0ae Peter Zijlstra 2019-10-03 31
c2406e1457f0ae Peter Zijlstra 2019-10-03 32 case RET:
c2406e1457f0ae Peter Zijlstra 2019-10-03 33 code = text_gen_insn(RET_INSN_OPCODE, insn, func);
c2406e1457f0ae Peter Zijlstra 2019-10-03 34 size = RET_INSN_SIZE;
c2406e1457f0ae Peter Zijlstra 2019-10-03 35 break;
c2406e1457f0ae Peter Zijlstra 2019-10-03 36 }
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 37
c2406e1457f0ae Peter Zijlstra 2019-10-03 @38 if (memcmp(insn, code, size) == 0)
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 39 return;
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 40
c2406e1457f0ae Peter Zijlstra 2019-10-03 41 text_poke_bp(insn, code, size, NULL);
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 42 }
e73ac4b6b2e16a Josh Poimboeuf 2018-11-26 43
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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