On Tue, Dec 03, 2013 at 03:10:52PM +0100, Johannes Berg wrote:
> From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
>
> This was added in 3.8 and not used until now.
> Since it it being used by the wireless stack, backport it.
>
> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
> ---
> backport/backport-include/linux/random.h | 3 +++
> backport/compat/compat-3.8.c | 32 ++++++++++++++++++++++++++++++++
> 2 files changed, 35 insertions(+)
>
> diff --git a/backport/backport-include/linux/random.h b/backport/backport-include/linux/random.h
> index 812ce7f..e915106 100644
> --- a/backport/backport-include/linux/random.h
> +++ b/backport/backport-include/linux/random.h
> @@ -8,6 +8,9 @@
> #define prandom_seed(_seed) srandom32(_seed)
> #define prandom_u32() random32()
> #define prandom_u32_state(_state) prandom32(_state)
> +/* backport 6582c665d6b882dad8329e05749fbcf119f1ab88 */
> +#define prandom_bytes LINUX_BACKPORT(prandom_bytes)
> +void prandom_bytes(void *buf, int bytes);
> #endif
>
> #endif /* __BACKPORT_RANDOM_H */
> diff --git a/backport/compat/compat-3.8.c b/backport/compat/compat-3.8.c
> index d43d386..70d3375 100644
> --- a/backport/compat/compat-3.8.c
> +++ b/backport/compat/compat-3.8.c
> @@ -16,6 +16,7 @@
> #include <linux/module.h>
> #include "hid-ids.h"
> #include <linux/netdevice.h>
> +#include <linux/random.h>
>
> #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,8))
> void netdev_set_default_ethtool_ops(struct net_device *dev,
> @@ -419,6 +420,37 @@ int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long
> }
> EXPORT_SYMBOL_GPL(vm_iomap_memory);
>
> +/**
> + * prandom_bytes - get the requested number of pseudo-random bytes
> + * @buf: where to copy the pseudo-random bytes to
> + * @bytes: the requested number of bytes
> + */
> +void prandom_bytes(void *buf, int bytes)
> +{
> + unsigned char *p = buf;
> + int i;
> +
> + for (i = 0; i < round_down(bytes, sizeof(u32)); i += sizeof(u32)) {
> + u32 random = random32();
> + int j;
> +
> + for (j = 0; j < sizeof(u32); j++) {
> + p[i + j] = random;
> + random >>= BITS_PER_BYTE;
> + }
> + }
> +
> + if (i < bytes) {
> + u32 random = random32();
> +
> + for (; i < bytes; i++) {
> + p[i] = random;
> + random >>= BITS_PER_BYTE;
> + }
> + }
> +}
> +EXPORT_SYMBOL_GPL(prandom_bytes_state);
Where is prandom_bytes_state defined? Did you mean prandom_bytes ?
This breaks compilation right now.
Luis
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