linux-kernel - Re: [PATCH v5 08/23] powerpc/8xx: Map IMMR area with 512k page at a fixed address

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Date:	Thu, 4 Feb 2016 17:58:33 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Christophe Leroy <christophe.leroy@....fr>
Cc:	kbuild-all@...org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Scott Wood <oss@...error.net>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v5 08/23] powerpc/8xx: Map IMMR area with 512k page at a
 fixed address

Hi Christophe,

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.5-rc2 next-20160204]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Christophe-Leroy/powerpc-8xx-Use-large-pages-for-RAM-and-IMMR-and-other-improvments/20160204-071322
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-mpc885_ads_defconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/mm/8xx_mmu.c: In function 'mmu_mapin_immr':
>> arch/powerpc/mm/8xx_mmu.c:61:17: error: lvalue required as left operand of assignment
     pmd_val(*pmdp) = val;
                    ^

vim +61 arch/powerpc/mm/8xx_mmu.c

    55		unsigned long v = VIRT_IMMR_BASE;
    56	#ifdef CONFIG_PPC_4K_PAGES
    57		pmd_t *pmdp;
    58		unsigned long val = p | MD_PS512K | MD_GUARDED;
    59	
    60		pmdp = pmd_offset(pud_offset(pgd_offset_k(v), v), v);
  > 61		pmd_val(*pmdp) = val;
    62	#else /* CONFIG_PPC_16K_PAGES */
    63		unsigned long f = pgprot_val(PAGE_KERNEL_NCG);
    64		int offset;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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