The patch titled
Subject: btrfs: fix race in btrfs_free_dummy_fs_info()
has been removed from the -mm tree. Its filename was
btrfs-fix-race-in-btrfs_free_dummy_fs_info.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Subject: btrfs: fix race in btrfs_free_dummy_fs_info()
We drop the lock which protects the radix tree, so we must call
radix_tree_iter_next() in order to avoid a modification to the tree
invalidating the iterator state.
Link: http://lkml.kernel.org/r/1480369871-5271-54-git-send-email-mawilcox@xxxxxxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Tested-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/tests/btrfs-tests.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/btrfs/tests/btrfs-tests.c~btrfs-fix-race-in-btrfs_free_dummy_fs_info fs/btrfs/tests/btrfs-tests.c
--- a/fs/btrfs/tests/btrfs-tests.c~btrfs-fix-race-in-btrfs_free_dummy_fs_info
+++ a/fs/btrfs/tests/btrfs-tests.c
@@ -162,6 +162,7 @@ void btrfs_free_dummy_fs_info(struct btr
slot = radix_tree_iter_retry(&iter);
continue;
}
+ slot = radix_tree_iter_next(&iter);
spin_unlock(&fs_info->buffer_lock);
free_extent_buffer_stale(eb);
spin_lock(&fs_info->buffer_lock);
_
Patches currently in -mm which might be from mawilcox@xxxxxxxxxxxxx are
radix-tree-test-suite-fix-compilation.patch
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