CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC (not configurable)

configname: CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC

Linux Kernel Configuration
└─>Library routines
└─>DMA_BOUNCE_UNALIGNED_KMALLOC
In linux kernel since version 6.5 (release Date: 2023-08-27)  
depends
CONFIG_SWIOTLB