linux-kernel - drivers/regulator/core.o: warning: objtool: regulator_count_voltages()+0x95: return with modified stack frame

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Date:   Fri, 10 May 2019 11:13:33 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>
Subject: drivers/regulator/core.o: warning: objtool:
 regulator_count_voltages()+0x95: return with modified stack frame

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ea5b2abd07e2280a332bd9c1a7f4dd15b9b6c13
commit: 37686b1353cfc30e127cef811959cdbcd0495d98 tracing: Improve "if" macro code generation
date:   5 weeks ago
config: x86_64-randconfig-b0-05100522 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 37686b1353cfc30e127cef811959cdbcd0495d98
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/regulator/core.o: warning: objtool: regulator_count_voltages()+0x95: return with modified stack frame
   drivers/regulator/core.o: warning: objtool: regulator_count_voltages()+0x0: stack state mismatch: cfa1=7+32 cfa2=7+8

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