tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f8c97bdb49832d2b0edaa0c05db873aa2f6101ff commit: 0b0a6994b02cac83ae132baea829ff073ca6cbef [9014/9031] mm/unaddressable-memory: new type of ZONE_DEVICE for unaddressable memory config: x86_64-randconfig-s2-04110006 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: git checkout 0b0a6994b02cac83ae132baea829ff073ca6cbef # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): mm/shmem.c: In function 'shmem_free_swap': >> mm/shmem.c:646: warning: value computed is not used vim +646 mm/shmem.c 6922c0c7 Hugh Dickins 2011-08-03 630 BUG_ON(error); 6922c0c7 Hugh Dickins 2011-08-03 631 } 6922c0c7 Hugh Dickins 2011-08-03 632 6922c0c7 Hugh Dickins 2011-08-03 633 /* 7a5d0fbb Hugh Dickins 2011-08-03 634 * Remove swap entry from radix tree, free the swap and its page cache. 7a5d0fbb Hugh Dickins 2011-08-03 635 */ 7a5d0fbb Hugh Dickins 2011-08-03 636 static int shmem_free_swap(struct address_space *mapping, 7a5d0fbb Hugh Dickins 2011-08-03 637 pgoff_t index, void *radswap) 7a5d0fbb Hugh Dickins 2011-08-03 638 { 6dbaf22c Johannes Weiner 2014-04-03 639 void *old; 7a5d0fbb Hugh Dickins 2011-08-03 640 7a5d0fbb Hugh Dickins 2011-08-03 641 spin_lock_irq(&mapping->tree_lock); 6dbaf22c Johannes Weiner 2014-04-03 642 old = radix_tree_delete_item(&mapping->page_tree, index, radswap); 7a5d0fbb Hugh Dickins 2011-08-03 643 spin_unlock_irq(&mapping->tree_lock); 6dbaf22c Johannes Weiner 2014-04-03 644 if (old != radswap) 6dbaf22c Johannes Weiner 2014-04-03 645 return -ENOENT; 7a5d0fbb Hugh Dickins 2011-08-03 @646 free_swap_and_cache(radix_to_swp_entry(radswap)); 6dbaf22c Johannes Weiner 2014-04-03 647 return 0; 7a5d0fbb Hugh Dickins 2011-08-03 648 } 7a5d0fbb Hugh Dickins 2011-08-03 649 7a5d0fbb Hugh Dickins 2011-08-03 650 /* 6a15a370 Vlastimil Babka 2016-01-14 651 * Determine (in bytes) how many of the shmem object's pages mapped by the 48131e03 Vlastimil Babka 2016-01-14 652 * given offsets are swapped out. 6a15a370 Vlastimil Babka 2016-01-14 653 * 6a15a370 Vlastimil Babka 2016-01-14 654 * This is safe to call without i_mutex or mapping->tree_lock thanks to RCU, :::::: The code at line 646 was first introduced by commit :::::: 7a5d0fbb29936fad7f17b1cb001b0c33a5f13328 tmpfs: convert shmem_truncate_range to radix-swap :::::: TO: Hugh Dickins <hughd@xxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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