linux-kernel - arch/powerpc/kexec/ima.c:156:21: sparse: sparse: incorrect type in assignment (different base types)

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Message-ID: <202005240516.sBPocLOs%lkp@intel.com>
Date:   Sun, 24 May 2020 05:40:19 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/kexec/ima.c:156:21: sparse: sparse: incorrect type in
 assignment (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   423b8baf18a8c03f2d6fa99aa447ed0da189bb95
commit: 793b08e2efff3ec020c5c5861d00ed394fcdd488 powerpc/kexec: Move kexec files into a dedicated subdir.
date:   6 months ago
config: powerpc-randconfig-s001-20200524 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-193-gb8fad4bc-dirty
        git checkout 793b08e2efff3ec020c5c5861d00ed394fcdd488
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=powerpc CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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


sparse warnings: (new ones prefixed by >>)

>> arch/powerpc/kexec/ima.c:156:21: sparse: sparse: incorrect type in assignment (different base types) @@    expected unsigned int [usertype] tmp @@    got restrunsigned int [usertype] tmp @@
>> arch/powerpc/kexec/ima.c:156:21: sparse:    expected unsigned int [usertype] tmp
>> arch/powerpc/kexec/ima.c:156:21: sparse:    got restricted __be32 [usertype]
>> arch/powerpc/kexec/ima.c:161:21: sparse: sparse: incorrect type in assignment (different base types) @@    expected unsigned long long [usertype] tmp @@    got nsigned long long [usertype] tmp @@
>> arch/powerpc/kexec/ima.c:161:21: sparse:    expected unsigned long long [usertype] tmp
>> arch/powerpc/kexec/ima.c:161:21: sparse:    got restricted __be64 [usertype]

vim +156 arch/powerpc/kexec/ima.c

ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  147  
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  148  static int write_number(void *p, u64 value, int cells)
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  149  {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  150  	if (cells == 1) {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  151  		u32 tmp;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  152  
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  153  		if (value > U32_MAX)
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  154  			return -EINVAL;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  155  
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 @156  		tmp = cpu_to_be32(value);
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  157  		memcpy(p, &tmp, sizeof(tmp));
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  158  	} else if (cells == 2) {
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  159  		u64 tmp;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  160  
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19 @161  		tmp = cpu_to_be64(value);
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  162  		memcpy(p, &tmp, sizeof(tmp));
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  163  	} else
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  164  		return -EINVAL;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  165  
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  166  	return 0;
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  167  }
ab6b1d1fc4aae6 arch/powerpc/kernel/ima_kexec.c Thiago Jung Bauermann 2016-12-19  168  

:::::: The code at line 156 was first introduced by commit
:::::: ab6b1d1fc4aae6b8bd6fb1422405568094c9b40f powerpc: ima: send the kexec buffer to the next kernel

:::::: TO: Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

---
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