Hi Thomas, I love your patch! Yet something to improve: [auto build test ERROR on 0e7deff6446a4ba2c75f499a0bfa80cd6a15c129] url: https://github.com/intel-lab-lkp/linux/commits/Thomas-Zimmermann/fbdev-Decouple-deferred-I-O-from-struct-page/20220425-192955 base: 0e7deff6446a4ba2c75f499a0bfa80cd6a15c129 config: parisc-randconfig-r011-20220425 (https://download.01.org/0day-ci/archive/20220425/202204252303.Xu2N4l6Y-lkp@xxxxxxxxx/config) compiler: hppa-linux-gcc (GCC) 11.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/183267de16bfe1cd6ec119bcfdaf95e3706bf87e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Thomas-Zimmermann/fbdev-Decouple-deferred-I-O-from-struct-page/20220425-192955 git checkout 183267de16bfe1cd6ec119bcfdaf95e3706bf87e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/video/fbdev/core/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/printk.h:11, from include/linux/kernel.h:29, from include/linux/cpumask.h:10, from include/linux/mm_types_task.h:14, from include/linux/mm_types.h:5, from include/linux/buildid.h:5, from include/linux/module.h:14, from drivers/video/fbdev/core/fbmem.c:14: drivers/video/fbdev/core/fbmem.c: In function 'fb_mmap': >> drivers/video/fbdev/core/fbmem.c:1362:42: error: 'struct fb_info' has no member named 'fbdefio' 1362 | if (dev_WARN_ONCE(info->dev, info->fbdefio, "fbdev mmap not set up for defered I/O.\n")) | ^~ include/linux/once_lite.h:15:41: note: in definition of macro 'DO_ONCE_LITE_IF' 15 | bool __ret_do_once = !!(condition); \ | ^~~~~~~~~ include/linux/dev_printk.h:274:9: note: in expansion of macro 'WARN_ONCE' 274 | WARN_ONCE(condition, "%s %s: " format, \ | ^~~~~~~~~ drivers/video/fbdev/core/fbmem.c:1362:13: note: in expansion of macro 'dev_WARN_ONCE' 1362 | if (dev_WARN_ONCE(info->dev, info->fbdefio, "fbdev mmap not set up for defered I/O.\n")) | ^~~~~~~~~~~~~ vim +1362 drivers/video/fbdev/core/fbmem.c 1332 1333 static int 1334 fb_mmap(struct file *file, struct vm_area_struct * vma) 1335 { 1336 struct fb_info *info = file_fb_info(file); 1337 unsigned long mmio_pgoff; 1338 unsigned long start; 1339 u32 len; 1340 1341 if (!info) 1342 return -ENODEV; 1343 mutex_lock(&info->mm_lock); 1344 1345 if (info->fbops->fb_mmap) { 1346 int res; 1347 1348 /* 1349 * The framebuffer needs to be accessed decrypted, be sure 1350 * SME protection is removed ahead of the call 1351 */ 1352 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 1353 res = info->fbops->fb_mmap(info, vma); 1354 mutex_unlock(&info->mm_lock); 1355 return res; 1356 } 1357 1358 /* 1359 * FB deferred I/O wants you to handle mmap in your drivers. At a 1360 * minimum, point struct fb_ops.fb_mmap to fb_deferred_io_mmap(). 1361 */ > 1362 if (dev_WARN_ONCE(info->dev, info->fbdefio, "fbdev mmap not set up for defered I/O.\n")) 1363 return -ENODEV; 1364 1365 /* 1366 * Ugh. This can be either the frame buffer mapping, or 1367 * if pgoff points past it, the mmio mapping. 1368 */ 1369 start = info->fix.smem_start; 1370 len = info->fix.smem_len; 1371 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; 1372 if (vma->vm_pgoff >= mmio_pgoff) { 1373 if (info->var.accel_flags) { 1374 mutex_unlock(&info->mm_lock); 1375 return -EINVAL; 1376 } 1377 1378 vma->vm_pgoff -= mmio_pgoff; 1379 start = info->fix.mmio_start; 1380 len = info->fix.mmio_len; 1381 } 1382 mutex_unlock(&info->mm_lock); 1383 1384 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 1385 fb_pgprotect(file, vma, start); 1386 1387 return vm_iomap_memory(vma, start, len); 1388 } 1389 -- 0-DAY CI Kernel Test Service https://01.org/lkp
