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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2022-09-28 18:47:30 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-09-29 21:37:27 +0200 |
| commit | 585cd5fe9f7378601b1d4915ad6e9088333b5e5e (patch) | |
| tree | dc9ebd5ca10e1341b6ec92bb75bdd0f9e9576485 | |
| parent | utsname: contribute changes to RNG (diff) | |
| download | linux-dev-585cd5fe9f7378601b1d4915ad6e9088333b5e5e.tar.xz linux-dev-585cd5fe9f7378601b1d4915ad6e9088333b5e5e.zip | |
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 <Jason@zx2c4.com>
| -rw-r--r-- | drivers/char/random.c | 2 | ||||
| -rw-r--r-- | include/linux/random.h | 2 |
2 files changed, 4 insertions, 0 deletions
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) |