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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2022-03-01 20:03:49 +0100 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-03-12 18:00:56 -0700 |
| commit | 5acd35487dc911541672b3ffc322851769c32a56 (patch) | |
| tree | ea7d9e993383b44e483fcd44fc85df78222f8af8 /include/linux/random.h | |
| parent | random: do not export add_vmfork_randomness() unless needed (diff) | |
| download | linux-dev-5acd35487dc911541672b3ffc322851769c32a56.tar.xz linux-dev-5acd35487dc911541672b3ffc322851769c32a56.zip | |
random: replace custom notifier chain with standard one
We previously rolled our own randomness readiness notifier, which only
has two users in the whole kernel. Replace this with a more standard
atomic notifier block that serves the same purpose with less code. Also
unexport the symbols, because no modules use it, only unconditional
builtins. The only drawback is that it's possible for a notification
handler returning the "stop" code to prevent further processing, but
given that there are only two users, and that we're unexporting this
anyway, that doesn't seem like a significant drawback for the
simplification we receive here.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'include/linux/random.h')
| -rw-r--r-- | include/linux/random.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/include/linux/random.h b/include/linux/random.h index f209f1a78899..fab1ab0563b4 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -10,11 +10,7 @@ #include <uapi/linux/random.h> -struct random_ready_callback { - struct list_head list; - void (*func)(struct random_ready_callback *rdy); - struct module *owner; -}; +struct notifier_block; extern void add_device_randomness(const void *, size_t); extern void add_bootloader_randomness(const void *, size_t); @@ -42,8 +38,8 @@ extern void get_random_bytes(void *buf, size_t nbytes); extern int wait_for_random_bytes(void); extern int __init rand_initialize(void); extern bool rng_is_initialized(void); -extern int add_random_ready_callback(struct random_ready_callback *rdy); -extern void del_random_ready_callback(struct random_ready_callback *rdy); +extern int register_random_ready_notifier(struct notifier_block *nb); +extern int unregister_random_ready_notifier(struct notifier_block *nb); extern size_t __must_check get_random_bytes_arch(void *buf, size_t nbytes); #ifndef MODULE |