Btrfs: use RCU instead of a spinlock to protect the root node

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The pointer to the extent buffer for the root of each tree
is protected by a spinlock so that we can safely read the pointer
and take a reference on the extent buffer.

But now that the extent buffers are freed via RCU, we can safely
use rcu_read_lock instead.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Chris Mason 2011-03-23 14:54:42 -04:00 • committed by root

parent c0da7aa1a2

commit 240f62c875

1 changed files with 8 additions and 19 deletions

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fs/btrfs/ctree.c

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