Import busybox-1.16.x kconfigs symbolsembtk-busybox-kconfigs-1.16.1

Signed-off-by: Abdoulaye Walsimou Gaye <awg@embtoolkit.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/busybox-modutils.kconfig b/busybox-modutils.kconfig
index 69f0907..677a518 100644
--- a/busybox-modutils.kconfig
+++ b/busybox-modutils.kconfig
@@ -112,6 +112,22 @@ config KEMBTK_BUSYB_FEATURE_2_4_MODULES
 	  This increases size considerably. Say N unless you plan
 	  to run ancient kernels.
 
+config KEMBTK_BUSYB_FEATURE_INSMOD_TRY_MMAP
+	bool "Try to load module from a mmap'ed area"
+	depends on KEMBTK_BUSYB_INSMOD || KEMBTK_BUSYB_MODPROBE_SMALL
+	depends on EMBTK_BB_VERSION_1_16_X
+	help
+	  This option causes module loading code to try to mmap
+	  module first. If it does not work (for example,
+	  it does not work for compressed modules), module will be read
+	  (and unpacked if needed) into a memory block allocated by malloc.
+
+	  The only case when mmap works but malloc does not is when
+	  you are trying to load a big module on a very memory-constrained
+	  machine. Malloc will momentarily need 2x as much memory as mmap.
+
+	  Choosing N saves about 250 bytes of code (on 32-bit x86).
+
 config KEMBTK_BUSYB_FEATURE_INSMOD_VERSION_CHECKING
 	bool "Enable module version checking"
 	depends on KEMBTK_BUSYB_FEATURE_2_4_MODULES && (KEMBTK_BUSYB_INSMOD || KEMBTK_BUSYB_MODPROBE)