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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>
This commit is contained in:
Anton Blanchard 2013-07-29 13:11:50 +10:00 committed by Grant Likely
parent 4485681939
commit 109b623629
1 changed files with 12 additions and 0 deletions
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12
drivers/of/fdt.c
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@ -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 @@ void __init unflatten_device_tree(void)
}
#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);