X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=mm%2FKconfig;h=b2d1aed56439f98b74fedb9b3e81c9cedb947b1e;hb=657712163ca3366c50d57addc8a6422036286fcb;hp=e742d06285b780eea632efe643e18d695f766928;hpb=109c3c0292d5b256bf9e5ca2b591aa9ac5804bc2;p=firefly-linux-kernel-4.4.55.git

diff --git a/mm/Kconfig b/mm/Kconfig
index e742d06285b7..b2d1aed56439 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -477,3 +477,30 @@ config FRONTSWAP
 	  and swap data is stored as normal on the matching swap device.
 
 	  If unsure, say Y to enable frontswap.
+
+config GENERIC_EARLY_IOREMAP
+	bool
+
+config CMA
+	bool "Contiguous Memory Allocator"
+	depends on HAVE_MEMBLOCK
+	select MIGRATION
+	select MEMORY_ISOLATION
+	help
+	  This enables the Contiguous Memory Allocator which allows other
+	  subsystems to allocate big physically-contiguous blocks of memory.
+	  CMA reserves a region of memory and allows only movable pages to
+	  be allocated from it. This way, the kernel can use the memory for
+	  pagecache and when a subsystem requests for contiguous area, the
+	  allocated pages are migrated away to serve the contiguous request.
+
+	  If unsure, say "n".
+
+config CMA_DEBUG
+	bool "CMA debug messages (DEVELOPMENT)"
+	depends on DEBUG_KERNEL && CMA
+	help
+	  Turns on debug messages in CMA.  This produces KERN_DEBUG
+	  messages for every CMA call as well as various messages while
+	  processing calls such as dma_alloc_from_contiguous().
+	  This option does not affect warning and error messages.