Author: Vaishali Thakkar <vthakkar1994@gmail.com> This patch replaces non-standard spin lock macro with standard linux function. This is done using Coccinelle and semantic patch used is as follows: @@ expression x; @@ – TREE_READ_LOCK_IRQ(x) + spin_lock_irq(&(x)->tree_lock) @@ expression x; @@ – TREE_READ_UNLOCK_IRQ(x) + spin_unlock_irq(&(x)->tree_lock) Also semantic patch result is modified by droping ->, inner & and …