ba01aadff1
This code in the kernel not only returns the locked root, but also takes a reference on the node. This is important for when we sync ctree.c into btrfs-progs, it expects that references are held on the root node after calling these helpers. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: David Sterba <dsterba@suse.com>
23 lines
464 B
C
23 lines
464 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include "kernel-shared/ctree.h"
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#include "kernel-shared/locking.h"
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struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root)
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{
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root->node->refs++;
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return root->node;
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}
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struct extent_buffer *btrfs_try_read_lock_root_node(struct btrfs_root *root)
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{
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root->node->refs++;
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return root->node;
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}
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struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root)
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{
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root->node->refs++;
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return root->node;
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}
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