From: Jason A. Donenfeld Date: Wed, 28 Sep 2022 16:47:30 +0000 (+0200) Subject: random: add 8-bit and 16-bit batches X-Git-Tag: v6.1-rc1~91^2~4 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=585cd5fe9f73;p=linux-block.git random: add 8-bit and 16-bit batches There are numerous places in the kernel that would be sped up by having smaller batches. Currently those callsites do `get_random_u32() & 0xff` or similar. Since these are pretty spread out, and will require patches to multiple different trees, let's get ahead of the curve and lay the foundation for `get_random_u8()` and `get_random_u16()`, so that it's then possible to start submitting conversion patches leisurely. Signed-off-by: Jason A. Donenfeld --- diff --git a/drivers/char/random.c b/drivers/char/random.c index f2aa3ab1b458..64ee16ffb8b7 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -506,6 +506,8 @@ EXPORT_SYMBOL(get_random_ ##type); DEFINE_BATCHED_ENTROPY(u64) DEFINE_BATCHED_ENTROPY(u32) +DEFINE_BATCHED_ENTROPY(u16) +DEFINE_BATCHED_ENTROPY(u8) #ifdef CONFIG_SMP /* diff --git a/include/linux/random.h b/include/linux/random.h index a9e6e16f9774..2c130f8f18e5 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -38,6 +38,8 @@ static inline int unregister_random_vmfork_notifier(struct notifier_block *nb) { #endif void get_random_bytes(void *buf, size_t len); +u8 get_random_u8(void); +u16 get_random_u16(void); u32 get_random_u32(void); u64 get_random_u64(void); static inline unsigned int get_random_int(void)