linux-kernel - Re: [PATCH v7 1/4] ioremap: Update pgtable free interfaces with addr

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Date:   Thu, 29 Mar 2018 19:53:32 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Chintan Pandya <cpandya@...eaurora.org>
Cc:     kbuild-all@...org, catalin.marinas@....com, will.deacon@....com,
        mark.rutland@....com, toshi.kani@....com, arnd@...db.de,
        ard.biesheuvel@...aro.org, marc.zyngier@....com,
        james.morse@....com, kristina.martsenko@....com,
        takahiro.akashi@...aro.org, gregkh@...uxfoundation.org,
        tglx@...utronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        akpm@...ux-foundation.org, Chintan Pandya <cpandya@...eaurora.org>
Subject: Re: [PATCH v7 1/4] ioremap: Update pgtable free interfaces with addr

Hi Chintan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc7]
[also build test ERROR on next-20180328]
[cannot apply to arm64/for-next/core tip/x86/core asm-generic/master]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Chintan-Pandya/ioremap-Update-pgtable-free-interfaces-with-addr/20180329-133736
config: x86_64-rhel (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/mm/pgtable.c: In function 'pud_free_pmd_page':
>> arch/x86/mm/pgtable.c:725:8: error: too few arguments to function 'pmd_free_pte_page'
      if (!pmd_free_pte_page(&pmd[i]), addr + (i * PMD_SIZE))
           ^~~~~~~~~~~~~~~~~
   In file included from arch/x86/include/asm/pgtable.h:1292:0,
                    from include/linux/memremap.h:8,
                    from include/linux/mm.h:27,
                    from arch/x86/mm/pgtable.c:2:
   include/asm-generic/pgtable.h:987:5: note: declared here
    int pmd_free_pte_page(pmd_t *pmd, unsigned long addr);
        ^~~~~~~~~~~~~~~~~
   arch/x86/mm/pgtable.c:725:34: warning: left-hand operand of comma expression has no effect [-Wunused-value]
      if (!pmd_free_pte_page(&pmd[i]), addr + (i * PMD_SIZE))
                                     ^

vim +/pmd_free_pte_page +725 arch/x86/mm/pgtable.c

   705	
   706	/**
   707	 * pud_free_pmd_page - Clear pud entry and free pmd page.
   708	 * @pud: Pointer to a PUD.
   709	 * @addr: Virtual address associated with pud.
   710	 *
   711	 * Context: The pud range has been unmaped and TLB purged.
   712	 * Return: 1 if clearing the entry succeeded. 0 otherwise.
   713	 */
   714	int pud_free_pmd_page(pud_t *pud, unsigned long addr)
   715	{
   716		pmd_t *pmd;
   717		int i;
   718	
   719		if (pud_none(*pud))
   720			return 1;
   721	
   722		pmd = (pmd_t *)pud_page_vaddr(*pud);
   723	
   724		for (i = 0; i < PTRS_PER_PMD; i++)
 > 725			if (!pmd_free_pte_page(&pmd[i]), addr + (i * PMD_SIZE))
   726				return 0;
   727	
   728		pud_clear(pud);
   729		free_page((unsigned long)pmd);
   730	
   731		return 1;
   732	}
   733	

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