Hi Chris, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on next-20190719] [cannot apply to v5.2] [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/Chris-Wilson/drm-i915-Flush-all-user-surfaces-prior-to-first-use/20190718-191329 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-b002-201928 (attached as .config) compiler: gcc-7 (Debian 7.4.0-10) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/gpu/drm/i915/gem/i915_gem_shmem.c: In function 'i915_gem_object_create_shmem': >> drivers/gpu/drm/i915/gem/i915_gem_shmem.c:462:15: error: unused variable 'cache_level' [-Werror=unused-variable] unsigned int cache_level; ^~~~~~~~~~~ cc1: all warnings being treated as errors vim +/cache_level +462 drivers/gpu/drm/i915/gem/i915_gem_shmem.c 8475355f Chris Wilson 2019-05-28 456 8475355f Chris Wilson 2019-05-28 457 struct drm_i915_gem_object * 8475355f Chris Wilson 2019-05-28 458 i915_gem_object_create_shmem(struct drm_i915_private *i915, u64 size) 8475355f Chris Wilson 2019-05-28 459 { 8475355f Chris Wilson 2019-05-28 460 struct drm_i915_gem_object *obj; 8475355f Chris Wilson 2019-05-28 461 struct address_space *mapping; 8475355f Chris Wilson 2019-05-28 @462 unsigned int cache_level; 8475355f Chris Wilson 2019-05-28 463 gfp_t mask; 8475355f Chris Wilson 2019-05-28 464 int ret; 8475355f Chris Wilson 2019-05-28 465 8475355f Chris Wilson 2019-05-28 466 /* There is a prevalence of the assumption that we fit the object's 8475355f Chris Wilson 2019-05-28 467 * page count inside a 32bit _signed_ variable. Let's document this and 8475355f Chris Wilson 2019-05-28 468 * catch if we ever need to fix it. In the meantime, if you do spot 8475355f Chris Wilson 2019-05-28 469 * such a local variable, please consider fixing! 8475355f Chris Wilson 2019-05-28 470 */ 8475355f Chris Wilson 2019-05-28 471 if (size >> PAGE_SHIFT > INT_MAX) 8475355f Chris Wilson 2019-05-28 472 return ERR_PTR(-E2BIG); 8475355f Chris Wilson 2019-05-28 473 8475355f Chris Wilson 2019-05-28 474 if (overflows_type(size, obj->base.size)) 8475355f Chris Wilson 2019-05-28 475 return ERR_PTR(-E2BIG); 8475355f Chris Wilson 2019-05-28 476 8475355f Chris Wilson 2019-05-28 477 obj = i915_gem_object_alloc(); 8475355f Chris Wilson 2019-05-28 478 if (!obj) 8475355f Chris Wilson 2019-05-28 479 return ERR_PTR(-ENOMEM); 8475355f Chris Wilson 2019-05-28 480 8475355f Chris Wilson 2019-05-28 481 ret = create_shmem(i915, &obj->base, size); 8475355f Chris Wilson 2019-05-28 482 if (ret) 8475355f Chris Wilson 2019-05-28 483 goto fail; 8475355f Chris Wilson 2019-05-28 484 8475355f Chris Wilson 2019-05-28 485 mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; 8475355f Chris Wilson 2019-05-28 486 if (IS_I965GM(i915) || IS_I965G(i915)) { 8475355f Chris Wilson 2019-05-28 487 /* 965gm cannot relocate objects above 4GiB. */ 8475355f Chris Wilson 2019-05-28 488 mask &= ~__GFP_HIGHMEM; 8475355f Chris Wilson 2019-05-28 489 mask |= __GFP_DMA32; 8475355f Chris Wilson 2019-05-28 490 } 8475355f Chris Wilson 2019-05-28 491 8475355f Chris Wilson 2019-05-28 492 mapping = obj->base.filp->f_mapping; 8475355f Chris Wilson 2019-05-28 493 mapping_set_gfp_mask(mapping, mask); 8475355f Chris Wilson 2019-05-28 494 GEM_BUG_ON(!(mapping_gfp_mask(mapping) & __GFP_RECLAIM)); 8475355f Chris Wilson 2019-05-28 495 8475355f Chris Wilson 2019-05-28 496 i915_gem_object_init(obj, &i915_gem_shmem_ops); 8475355f Chris Wilson 2019-05-28 497 8475355f Chris Wilson 2019-05-28 498 obj->write_domain = I915_GEM_DOMAIN_CPU; 8475355f Chris Wilson 2019-05-28 499 obj->read_domains = I915_GEM_DOMAIN_CPU; 8475355f Chris Wilson 2019-05-28 500 fb172dbb Chris Wilson 2019-07-18 501 /* fb172dbb Chris Wilson 2019-07-18 502 * Note that userspace has control over cache-bypass fb172dbb Chris Wilson 2019-07-18 503 * via its command stream, so even on LLC architectures fb172dbb Chris Wilson 2019-07-18 504 * we have to flush out the CPU cache to memory to fb172dbb Chris Wilson 2019-07-18 505 * clear previous contents. 8475355f Chris Wilson 2019-05-28 506 */ fb172dbb Chris Wilson 2019-07-18 507 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); 8475355f Chris Wilson 2019-05-28 508 8475355f Chris Wilson 2019-05-28 509 trace_i915_gem_object_create(obj); 8475355f Chris Wilson 2019-05-28 510 8475355f Chris Wilson 2019-05-28 511 return obj; 8475355f Chris Wilson 2019-05-28 512 8475355f Chris Wilson 2019-05-28 513 fail: 8475355f Chris Wilson 2019-05-28 514 i915_gem_object_free(obj); 8475355f Chris Wilson 2019-05-28 515 return ERR_PTR(ret); 8475355f Chris Wilson 2019-05-28 516 } 8475355f Chris Wilson 2019-05-28 517 :::::: The code at line 462 was first introduced by commit :::::: 8475355f7a2645a022288301c03555c31fb4de17 drm/i915: Move shmem object setup to its own file :::::: TO: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> :::::: CC: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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