linux-ext4 - [ext4:lazy_journal 34/36] fs/jbd2/jmap.c:104:7: warning: cast from pointer to integer of different size

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Date:   Mon, 13 Feb 2017 14:44:50 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Abutalib Aghayev <agayev@...cmu.edu>
Cc:     kbuild-all@...org, linux-ext4@...r.kernel.org,
        Theodore Ts'o <tytso@....edu>
Subject: [ext4:lazy_journal 34/36] fs/jbd2/jmap.c:104:7: warning: cast from
 pointer to integer of different size

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git lazy_journal
head:   c3a5aefebea108e050865d5bdf9fd11b9c7f6c5e
commit: efcc903c601fe6f73723e1899761dc8c655caf0e [34/36] Introduce cleaner
config: i386-defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout efcc903c601fe6f73723e1899761dc8c655caf0e
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   fs/jbd2/jmap.c: In function 'process_existing_mappings':
>> fs/jbd2/jmap.c:104:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
          (unsigned long long) journal->j_cleaner_ctx->pos);
          ^

vim +104 fs/jbd2/jmap.c

    88				mappings[nr_new++] = mappings[i];
    89				continue;
    90			}
    91			/*
    92			 * We are either deleting the entry because it was revoked, or
    93			 * we are moving it to the live blocks list of this transaction.
    94			 * In either case, we remove it from its existing list.
    95			 * However, before removing it we check to see if this is an
    96			 * entry in the live blocks list of the tail transaction a
    97			 * pointer to whom is cached by the cleaner and update the
    98			 * cached pointer if so.
    99			 */
   100			spin_lock(&journal->j_cleaner_ctx->pos_lock);
   101			if (je == journal->j_cleaner_ctx->pos) {
   102				journal->j_cleaner_ctx->pos = list_next_entry(je, list);
   103				trace_jbd2_jmap_printf1("updating pos to",
 > 104							(unsigned long long) journal->j_cleaner_ctx->pos);
   105			}
   106			list_del(&je->list);
   107			spin_unlock(&journal->j_cleaner_ctx->pos_lock);
   108	
   109			if (je->revoked) {
   110				rb_erase(&je->rb_node, &journal->j_jmap);
   111				kmem_cache_free(jbd2_jmap_cache, je);
   112			} else {

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