+ swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch added to -mm tree

+ swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch added to -mm tree

[akpm]

The patch titled
     Subject: swap-fix-oops-during-block-io-poll-in-swapin-path-fix
has been added to the -mm tree.  Its filename is
     swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch

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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: swap-fix-oops-during-block-io-poll-in-swapin-path-fix

add comment

Cc: Huang Ying <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Tim Chen <tim.c.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_io.c |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN mm/page_io.c~swap-fix-oops-during-block-io-poll-in-swapin-path-fix mm/page_io.c
--- a/mm/page_io.c~swap-fix-oops-during-block-io-poll-in-swapin-path-fix
+++ a/mm/page_io.c
@@ -380,6 +380,10 @@ int swap_readpage(struct page *page, boo
 		goto out;
 	}
 	bdev = bio->bi_bdev;
+	/*
+	 * Keep this task valid during swap readpage because the oom killer may
+	 * attempt to access it in the page fault retry time check.
+	 */
 	get_task_struct(current);
 	bio->bi_private = current;
 	bio_set_op_attrs(bio, REQ_OP_READ, 0);
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

i-need-old-gcc.patch
mm-mprotect-flush-tlb-if-potentially-racing-with-a-parallel-reclaim-leaving-stale-tlb-entries-fix.patch
mm-mprotect-flush-tlb-if-potentially-racing-with-a-parallel-reclaim-leaving-stale-tlb-entries-fix-fix.patch
fortify-use-warn-instead-of-bug-for-now-fix.patch
swap-fix-oops-during-block-io-poll-in-swapin-path-fix.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
ocfs2-old-mle-put-and-release-after-the-function-dlm_add_migration_mle-called-fix.patch
ocfs2-dlm-optimization-of-code-while-free-dead-node-locks-checkpatch-fixes.patch
mm.patch
mm-memory_hotplug-just-build-zonelist-for-new-added-node-fix.patch
mm-memory_hotplug-just-build-zonelist-for-new-added-node-fix-fix.patch
zsmalloc-zs_page_migrate-skip-unnecessary-loops-but-not-return-ebusy-if-zspage-is-not-inuse-fix.patch
kernel-reboot-add-devm_register_reboot_notifier-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch