perf/core: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:

  "1.   This use of RCU_INIT_POINTER() is NULLing out the pointer"

it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.

The following Coccinelle semantic patch was used:

  - rcu_assign_pointer
    (..., NULL)

Signed-off-by: Andreea-Cristina Bernat <>
Signed-off-by: Peter Zijlstra (Intel) <>
Cc: Arnaldo Carvalho de Melo <>
Signed-off-by: Ingo Molnar <>
1 file changed