of: Feed entire flattened device tree into the random pool
We feed the entire DMI table into the random pool to provide
better random data during early boot, so do the same with the
flattened device tree.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4c5ee96..543c500 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -18,6 +18,7 @@
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
+#include <linux/random.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
#ifdef CONFIG_PPC
@@ -726,3 +727,14 @@
}
#endif /* CONFIG_OF_EARLY_FLATTREE */
+
+/* Feed entire flattened device tree into the random pool */
+static int __init add_fdt_randomness(void)
+{
+ if (initial_boot_params)
+ add_device_randomness(initial_boot_params,
+ be32_to_cpu(initial_boot_params->totalsize));
+
+ return 0;
+}
+core_initcall(add_fdt_randomness);