CMA: document cma=0

[mirror_ubuntu-jammy-kernel.git] / drivers / base / Kconfig

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 134f763d90fdaf36668198cf6ac3d0406c77efdc..61a33f4ba608cdc2fe01f691f46f92b2aba1d3e7 100644 (file)
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -252,6 +252,9 @@ config DMA_CMA
          to allocate big physically-contiguous blocks of memory for use with
          hardware components that do not support I/O map nor scatter-gather.
 
+         You can disable CMA by specifying "cma=0" on the kernel's command
+         line.
+
          For more information see <include/linux/dma-contiguous.h>.
          If unsure, say "n".