From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753044AbdK1DNI (ORCPT ); Mon, 27 Nov 2017 22:13:08 -0500 Received: from mga01.intel.com ([192.55.52.88]:59769 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751711AbdK1DNH (ORCPT ); Mon, 27 Nov 2017 22:13:07 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,466,1505804400"; d="scan'208";a="10367330" Date: Tue, 28 Nov 2017 11:12:44 +0800 From: kbuild test robot To: Ben Skeggs Cc: kbuild-all@01.org, linux-kernel@vger.kernel.org Subject: drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c:550:2-3: Unneeded semicolon Message-ID: <201711281129.UtFuTbC1%fengguang.wu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: fengguang.wu@intel.com X-SA-Exim-Scanned: No (on bee); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 commit: eb813999f20097d24310836dfa07a97e2eb0c936 drm/nouveau/mmu: implement new vmm backend date: 4 weeks ago coccinelle warnings: (new ones prefixed by >>) >> drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c:550:2-3: Unneeded semicolon vim +550 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c 466 467 static inline u64 468 nvkm_vmm_iter(struct nvkm_vmm *vmm, const struct nvkm_vmm_page *page, 469 u64 addr, u64 size, const char *name, bool ref, 470 bool (*REF_PTES)(struct nvkm_vmm_iter *, u32, u32), 471 nvkm_vmm_pte_func MAP_PTES, struct nvkm_vmm_map *map, 472 nvkm_vmm_pxe_func CLR_PTES) 473 { 474 const struct nvkm_vmm_desc *desc = page->desc; 475 struct nvkm_vmm_iter it; 476 u64 bits = addr >> page->shift; 477 478 it.page = page; 479 it.desc = desc; 480 it.vmm = vmm; 481 it.cnt = size >> page->shift; 482 it.flush = NVKM_VMM_LEVELS_MAX; 483 484 /* Deconstruct address into PTE indices for each mapping level. */ 485 for (it.lvl = 0; desc[it.lvl].bits; it.lvl++) { 486 it.pte[it.lvl] = bits & ((1 << desc[it.lvl].bits) - 1); 487 bits >>= desc[it.lvl].bits; 488 } 489 it.max = --it.lvl; 490 it.pt[it.max] = vmm->pd; 491 492 it.lvl = 0; 493 TRA(&it, "%s: %016llx %016llx %d %lld PTEs", name, 494 addr, size, page->shift, it.cnt); 495 it.lvl = it.max; 496 497 /* Depth-first traversal of page tables. */ 498 while (it.cnt) { 499 struct nvkm_vmm_pt *pgt = it.pt[it.lvl]; 500 const int type = desc->type == SPT; 501 const u32 pten = 1 << desc->bits; 502 const u32 ptei = it.pte[0]; 503 const u32 ptes = min_t(u64, it.cnt, pten - ptei); 504 505 /* Walk down the tree, finding page tables for each level. */ 506 for (; it.lvl; it.lvl--) { 507 const u32 pdei = it.pte[it.lvl]; 508 struct nvkm_vmm_pt *pgd = pgt; 509 510 /* Software PT. */ 511 if (ref && NVKM_VMM_PDE_INVALID(pgd->pde[pdei])) { 512 if (!nvkm_vmm_ref_swpt(&it, pgd, pdei)) 513 goto fail; 514 } 515 it.pt[it.lvl - 1] = pgt = pgd->pde[pdei]; 516 517 /* Hardware PT. 518 * 519 * This is a separate step from above due to GF100 and 520 * newer having dual page tables at some levels, which 521 * are refcounted independently. 522 */ 523 if (ref && !pgt->refs[desc[it.lvl - 1].type == SPT]) { 524 if (!nvkm_vmm_ref_hwpt(&it, pgd, pdei)) 525 goto fail; 526 } 527 } 528 529 /* Handle PTE updates. */ 530 if (!REF_PTES || REF_PTES(&it, ptei, ptes)) { 531 struct nvkm_mmu_pt *pt = pgt->pt[type]; 532 if (MAP_PTES || CLR_PTES) { 533 if (MAP_PTES) 534 MAP_PTES(vmm, pt, ptei, ptes, map); 535 else 536 CLR_PTES(vmm, pt, ptei, ptes); 537 nvkm_vmm_flush_mark(&it); 538 } 539 } 540 541 /* Walk back up the tree to the next position. */ 542 it.pte[it.lvl] += ptes; 543 it.cnt -= ptes; 544 if (it.cnt) { 545 while (it.pte[it.lvl] == (1 << desc[it.lvl].bits)) { 546 it.pte[it.lvl++] = 0; 547 it.pte[it.lvl]++; 548 } 549 } > 550 }; 551 552 nvkm_vmm_flush(&it); 553 return ~0ULL; 554 555 fail: 556 /* Reconstruct the failure address so the caller is able to 557 * reverse any partially completed operations. 558 */ 559 addr = it.pte[it.max--]; 560 do { 561 addr = addr << desc[it.max].bits; 562 addr |= it.pte[it.max]; 563 } while (it.max--); 564 565 return addr << page->shift; 566 } 567 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation