linux-kernel - Re: [PATCH v4 10/10] mmap locking API: rename mmap_sem to mmap

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Date:   Tue, 21 Apr 2020 13:33:00 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Michel Lespinasse <walken@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm <linux-mm@...ck.org>
Cc:     kbuild-all@...ts.01.org,
        Linux Memory Management List <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        Liam Howlett <Liam.Howlett@...cle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH v4 10/10] mmap locking API: rename mmap_sem to mmap_lock

Hi Michel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on rdma/for-next]
[also build test ERROR on kvms390/next linus/master v5.7-rc2]
[cannot apply to powerpc/next uml/linux-next next-20200420]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Michel-Lespinasse/Add-a-new-mmap-locking-API-wrapping-mmap_sem-calls/20200415-084649
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
config: riscv-randconfig-a001-20200421 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=riscv 

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

All errors (new ones prefixed by >>):

   arch/riscv/mm/pageattr.c: In function '__set_memory':
>> arch/riscv/mm/pageattr.c:120:21: error: 'struct mm_struct' has no member named 'mmap_sem'; did you mean 'mmap_base'?
     120 |  down_read(&init_mm.mmap_sem);
         |                     ^~~~~~~~
         |                     mmap_base
   arch/riscv/mm/pageattr.c:123:19: error: 'struct mm_struct' has no member named 'mmap_sem'; did you mean 'mmap_base'?
     123 |  up_read(&init_mm.mmap_sem);
         |                   ^~~~~~~~
         |                   mmap_base

vim +120 arch/riscv/mm/pageattr.c

d3ab332a502123 Zong Li 2020-03-10  105  
d3ab332a502123 Zong Li 2020-03-10  106  static int __set_memory(unsigned long addr, int numpages, pgprot_t set_mask,
d3ab332a502123 Zong Li 2020-03-10  107  			pgprot_t clear_mask)
d3ab332a502123 Zong Li 2020-03-10  108  {
d3ab332a502123 Zong Li 2020-03-10  109  	int ret;
d3ab332a502123 Zong Li 2020-03-10  110  	unsigned long start = addr;
d3ab332a502123 Zong Li 2020-03-10  111  	unsigned long end = start + PAGE_SIZE * numpages;
d3ab332a502123 Zong Li 2020-03-10  112  	struct pageattr_masks masks = {
d3ab332a502123 Zong Li 2020-03-10  113  		.set_mask = set_mask,
d3ab332a502123 Zong Li 2020-03-10  114  		.clear_mask = clear_mask
d3ab332a502123 Zong Li 2020-03-10  115  	};
d3ab332a502123 Zong Li 2020-03-10  116  
d3ab332a502123 Zong Li 2020-03-10  117  	if (!numpages)
d3ab332a502123 Zong Li 2020-03-10  118  		return 0;
d3ab332a502123 Zong Li 2020-03-10  119  
d3ab332a502123 Zong Li 2020-03-10 @120  	down_read(&init_mm.mmap_sem);
d3ab332a502123 Zong Li 2020-03-10  121  	ret =  walk_page_range_novma(&init_mm, start, end, &pageattr_ops, NULL,
d3ab332a502123 Zong Li 2020-03-10  122  				     &masks);
d3ab332a502123 Zong Li 2020-03-10  123  	up_read(&init_mm.mmap_sem);
d3ab332a502123 Zong Li 2020-03-10  124  
d3ab332a502123 Zong Li 2020-03-10  125  	flush_tlb_kernel_range(start, end);
d3ab332a502123 Zong Li 2020-03-10  126  
d3ab332a502123 Zong Li 2020-03-10  127  	return ret;
d3ab332a502123 Zong Li 2020-03-10  128  }
d3ab332a502123 Zong Li 2020-03-10  129  

:::::: The code at line 120 was first introduced by commit
:::::: d3ab332a5021235a74fd832a49c6a99404920d88 riscv: add ARCH_HAS_SET_MEMORY support

:::::: TO: Zong Li <zong.li@...ive.com>
:::::: CC: Palmer Dabbelt <palmerdabbelt@...gle.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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