Hi Dave, [auto build test ERROR on mmotm/master] [cannot apply to linus/master linux/master v4.10-rc6 next-20170203] [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/Dave-Jiang/mm-replace-FAULT_FLAG_SIZE-with-parameter-to-huge_fault/20170204-053548 base: git://git.cmpxchg.org/linux-mmotm.git master config: i386-randconfig-x004-201705 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): >> fs/ext4/file.c:280:1: error: conflicting types for 'ext4_dax_huge_fault' ext4_dax_huge_fault(struct vm_fault *vmf) ^~~~~~~~~~~~~~~~~~~ fs/ext4/file.c:258:12: note: previous definition of 'ext4_dax_huge_fault' was here static int ext4_dax_huge_fault(struct vm_fault *vmf, ^~~~~~~~~~~~~~~~~~~ fs/ext4/file.c: In function 'ext4_dax_huge_fault': >> fs/ext4/file.c:292:32: error: incompatible type for argument 2 of 'dax_iomap_fault' result = dax_iomap_fault(vmf, &ext4_iomap_ops); ^ In file included from fs/ext4/file.c:25:0: include/linux/dax.h:41:5: note: expected 'enum page_entry_size' but argument is of type 'struct iomap_ops *' int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size, ^~~~~~~~~~~~~~~ >> fs/ext4/file.c:292:11: error: too few arguments to function 'dax_iomap_fault' result = dax_iomap_fault(vmf, &ext4_iomap_ops); ^~~~~~~~~~~~~~~ In file included from fs/ext4/file.c:25:0: include/linux/dax.h:41:5: note: declared here int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size, ^~~~~~~~~~~~~~~ fs/ext4/file.c: In function 'ext4_dax_fault': >> fs/ext4/file.c:302:9: error: too many arguments to function 'ext4_dax_huge_fault' return ext4_dax_huge_fault(vmf, PE_SIZE_PTE); ^~~~~~~~~~~~~~~~~~~ fs/ext4/file.c:280:1: note: declared here ext4_dax_huge_fault(struct vm_fault *vmf) ^~~~~~~~~~~~~~~~~~~ fs/ext4/file.c: At top level: >> fs/ext4/file.c:337:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] .huge_fault = ext4_dax_huge_fault, ^~~~~~~~~~~~~~~~~~~ fs/ext4/file.c:337:16: note: (near initialization for 'ext4_dax_vm_ops.huge_fault') fs/ext4/file.c:258:12: warning: 'ext4_dax_huge_fault' defined but not used [-Wunused-function] static int ext4_dax_huge_fault(struct vm_fault *vmf, ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/ext4_dax_huge_fault +280 fs/ext4/file.c 01a33b4ac Matthew Wilcox 2015-09-08 274 sb_end_pagefault(sb); 01a33b4ac Matthew Wilcox 2015-09-08 275 01a33b4ac Matthew Wilcox 2015-09-08 276 return result; 923ae0ff9 Ross Zwisler 2015-02-16 277 } 923ae0ff9 Ross Zwisler 2015-02-16 278 c6da0697e Dave Jiang 2017-02-02 279 static int 30599588c Dave Jiang 2017-02-02 @280 ext4_dax_huge_fault(struct vm_fault *vmf) 11bd1a9ec Matthew Wilcox 2015-09-08 281 { 01a33b4ac Matthew Wilcox 2015-09-08 282 int result; e6ae40ec2 Dave Jiang 2017-02-02 283 struct inode *inode = file_inode(vmf->vma->vm_file); 01a33b4ac Matthew Wilcox 2015-09-08 284 struct super_block *sb = inode->i_sb; c6da0697e Dave Jiang 2017-02-02 285 bool write = vmf->flags & FAULT_FLAG_WRITE; 01a33b4ac Matthew Wilcox 2015-09-08 286 01a33b4ac Matthew Wilcox 2015-09-08 287 if (write) { 01a33b4ac Matthew Wilcox 2015-09-08 288 sb_start_pagefault(sb); e6ae40ec2 Dave Jiang 2017-02-02 289 file_update_time(vmf->vma->vm_file); 1db175428 Jan Kara 2016-10-21 290 } ea3d7209c Jan Kara 2015-12-07 291 down_read(&EXT4_I(inode)->i_mmap_sem); 30599588c Dave Jiang 2017-02-02 @292 result = dax_iomap_fault(vmf, &ext4_iomap_ops); ea3d7209c Jan Kara 2015-12-07 293 up_read(&EXT4_I(inode)->i_mmap_sem); 1db175428 Jan Kara 2016-10-21 294 if (write) 01a33b4ac Matthew Wilcox 2015-09-08 295 sb_end_pagefault(sb); 01a33b4ac Matthew Wilcox 2015-09-08 296 01a33b4ac Matthew Wilcox 2015-09-08 297 return result; 11bd1a9ec Matthew Wilcox 2015-09-08 298 } 11bd1a9ec Matthew Wilcox 2015-09-08 299 22711acc4 Dave Jiang 2017-02-03 300 static int ext4_dax_fault(struct vm_fault *vmf) 22711acc4 Dave Jiang 2017-02-03 301 { 22711acc4 Dave Jiang 2017-02-03 @302 return ext4_dax_huge_fault(vmf, PE_SIZE_PTE); 22711acc4 Dave Jiang 2017-02-03 303 } 22711acc4 Dave Jiang 2017-02-03 304 ea3d7209c Jan Kara 2015-12-07 305 /* 1e9d180ba Ross Zwisler 2016-02-27 306 * Handle write fault for VM_MIXEDMAP mappings. Similarly to ext4_dax_fault() ea3d7209c Jan Kara 2015-12-07 307 * handler we check for races agaist truncate. Note that since we cycle through ea3d7209c Jan Kara 2015-12-07 308 * i_mmap_sem, we are sure that also any hole punching that began before we ea3d7209c Jan Kara 2015-12-07 309 * were called is finished by now and so if it included part of the file we ea3d7209c Jan Kara 2015-12-07 310 * are working on, our pte will get unmapped and the check for pte_same() in ea3d7209c Jan Kara 2015-12-07 311 * wp_pfn_shared() fails. Thus fault gets retried and things work out as ea3d7209c Jan Kara 2015-12-07 312 * desired. ea3d7209c Jan Kara 2015-12-07 313 */ 1ebf3e0da Dave Jiang 2017-02-02 314 static int ext4_dax_pfn_mkwrite(struct vm_fault *vmf) ea3d7209c Jan Kara 2015-12-07 315 { 1ebf3e0da Dave Jiang 2017-02-02 316 struct inode *inode = file_inode(vmf->vma->vm_file); ea3d7209c Jan Kara 2015-12-07 317 struct super_block *sb = inode->i_sb; ea3d7209c Jan Kara 2015-12-07 318 loff_t size; d5be7a03b Ross Zwisler 2016-01-22 319 int ret; ea3d7209c Jan Kara 2015-12-07 320 ea3d7209c Jan Kara 2015-12-07 321 sb_start_pagefault(sb); 1ebf3e0da Dave Jiang 2017-02-02 322 file_update_time(vmf->vma->vm_file); ea3d7209c Jan Kara 2015-12-07 323 down_read(&EXT4_I(inode)->i_mmap_sem); ea3d7209c Jan Kara 2015-12-07 324 size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; ea3d7209c Jan Kara 2015-12-07 325 if (vmf->pgoff >= size) ea3d7209c Jan Kara 2015-12-07 326 ret = VM_FAULT_SIGBUS; d5be7a03b Ross Zwisler 2016-01-22 327 else 1ebf3e0da Dave Jiang 2017-02-02 328 ret = dax_pfn_mkwrite(vmf); ea3d7209c Jan Kara 2015-12-07 329 up_read(&EXT4_I(inode)->i_mmap_sem); ea3d7209c Jan Kara 2015-12-07 330 sb_end_pagefault(sb); ea3d7209c Jan Kara 2015-12-07 331 ea3d7209c Jan Kara 2015-12-07 332 return ret; 923ae0ff9 Ross Zwisler 2015-02-16 333 } 923ae0ff9 Ross Zwisler 2015-02-16 334 923ae0ff9 Ross Zwisler 2015-02-16 335 static const struct vm_operations_struct ext4_dax_vm_ops = { 923ae0ff9 Ross Zwisler 2015-02-16 336 .fault = ext4_dax_fault, 22711acc4 Dave Jiang 2017-02-03 @337 .huge_fault = ext4_dax_huge_fault, 1e9d180ba Ross Zwisler 2016-02-27 338 .page_mkwrite = ext4_dax_fault, ea3d7209c Jan Kara 2015-12-07 339 .pfn_mkwrite = ext4_dax_pfn_mkwrite, 923ae0ff9 Ross Zwisler 2015-02-16 340 }; :::::: The code at line 280 was first introduced by commit :::::: 30599588c9eaccc211d383c9974a3a88dfa6e7d5 mm,fs,dax: change ->pmd_fault to ->huge_fault :::::: TO: Dave Jiang <dave.jiang@xxxxxxxxx> :::::: CC: Johannes Weiner <hannes@xxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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