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of: Feed entire flattened device tree into the random pool

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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);