Hi, got this at a hardened stable Gentoo Server: # uname -a Linux mr-fox 5.14.17 #1 SMP Thu Nov 18 14:02:58 CET 2021 x86_64 AMD Ryzen 9 5950X 16-Core Processor AuthenticAMD GNU/Linux CC net/ipv4/tcp_timer.o CC lib/raid6/sse1.o drivers/dma/ptdma/ptdma-debugfs.c: In function ‘ptdma_debugfs_setup’: drivers/dma/ptdma/ptdma-debugfs.c:93:54: error: ‘struct dma_device’ has no member named ‘dbg_dev_root’ 93 | debugfs_create_file("info", 0400, pt->dma_dev.dbg_dev_root, pt, | ^ drivers/dma/ptdma/ptdma-debugfs.c:96:55: error: ‘struct dma_device’ has no member named ‘dbg_dev_root’ 96 | debugfs_create_file("stats", 0400, pt->dma_dev.dbg_dev_root, pt, | ^ drivers/dma/ptdma/ptdma-debugfs.c:102:52: error: ‘struct dma_device’ has no member named ‘dbg_dev_root’ 102 | debugfs_create_dir("q", pt->dma_dev.dbg_dev_root); | ^ make[3]: *** [scripts/Makefile.build:277: drivers/dma/ptdma/ptdma-debugfs.o] Error 1 make[2]: *** [scripts/Makefile.build:540: drivers/dma/ptdma] Error 2 make[1]: *** [scripts/Makefile.build:540: drivers/dma] Error 2 make[1]: *** Waiting for unfinished jobs.... CC mm/usercopy.o CC lib/argv_split.o -- Toralf