Symbol: xa_cmpxchg_bh
include/linux/xarray.h
1106
return xa_err(xa_cmpxchg_bh(xa, index, NULL, XA_ZERO_ENTRY, gfp));
net/core/page_pool.c
516
old = xa_cmpxchg_bh(&pool->dma_mapped, id, page, NULL, 0);