Remove unneeded call to rngd

Author: fhunleth

nerves_defconfig

@@ -50,7 +50,6 @@ BR2_PACKAGE_RPI_FIRMWARE=y
 BR2_PACKAGE_RPI_FIRMWARE_CUSTOM_VERSION="1.20250127"
 BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4_X=y
 BR2_PACKAGE_PIGPIO=y
-# BR2_PACKAGE_RNG_TOOLS_JITTERENTROPY_LIBRARY is not set
 BR2_PACKAGE_RPI_USERLAND=y
 # BR2_PACKAGE_ALSA_LIB_RAWMIDI is not set
 # BR2_PACKAGE_ALSA_LIB_HWDEP is not set
@@ -79,6 +78,7 @@ BR2_NERVES_SYSTEM_NAME="nerves_system_rpi4"
 BR2_NERVES_ADDITIONAL_IMAGE_FILES="${NERVES_DEFCONFIG_DIR}/fwup.conf ${NERVES_DEFCONFIG_DIR}/cmdline.txt ${NERVES_DEFCONFIG_DIR}/config.txt"
 BR2_PACKAGE_NBTTY=y
 BR2_PACKAGE_NERVES_CONFIG=y
+BR2_PACKAGE_NERVES_CONFIG_ACCEPT_RNG_NOTICE=y
 BR2_PACKAGE_RPICAM_APPS=y
 BR2_PACKAGE_RPI_DISTRO_FIRMWARE_NONFREE=y
 BR2_PACKAGE_RPI_LIBCAMERA_V4L2=y

rootfs_overlay/etc/erlinit.config

@@ -20,13 +20,6 @@
 # Comment out or delete for HDMI (tty1)
 -s "/usr/bin/nbtty"
 
-# There's a call to getrandom(2) when loading the crypto NIF that's before
-# nerves_runtime can start rngd. This syscall can block the BEAM indefinitely
-# if there's not enough entropy in the kernel. We have not observed blocking on
-# this platform. However, we don't know that getrandom(2) will always have
-# enough entropy, so start rngd here to be safe.
---pre-run-exec /usr/sbin/rngd
-
 # Specify the user and group IDs for the Erlang VM
 #--uid 100
 #--gid 200