[PATCH 4.9 207/264] random: remove extern from functions in header

Greg Kroah-Hartman
2022-06-23T17:08:54Z

From: "Jason A. Donenfeld" <Jason@zx2c4.com>

commit 7782cfeca7d420e8bb707613d4cfb0f7ff29bb3a upstream.

Accoriding to the kernel style guide, having `extern` on functions in
headers is old school and deprecated, and doesn't add anything. So remove
them from random.h, and tidy up the file a little bit too.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/random.h | 67 +++++++++++++++++++------------------------------
1 file changed, 27 insertions(+), 40 deletions(-)

--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -12,13 +12,12 @@

struct notifier_block;

-extern void add_device_randomness(const void *, size_t);
-extern void add_bootloader_randomness(const void *, size_t);
-extern void add_input_randomness(unsigned int type, unsigned int code,
- unsigned int value) __latent_entropy;
-extern void add_interrupt_randomness(int irq) __latent_entropy;
-extern void add_hwgenerator_randomness(const void *buffer, size_t count,
- size_t entropy);
+void add_device_randomness(const void *, size_t);
+void add_bootloader_randomness(const void *, size_t);
+void add_input_randomness(unsigned int type, unsigned int code,
+ unsigned int value) __latent_entropy;
+void add_interrupt_randomness(int irq) __latent_entropy;
+void add_hwgenerator_randomness(const void *buffer, size_t count, size_t entropy);

#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
static inline void add_latent_entropy(void)
@@ -26,21 +25,11 @@ static inline void add_latent_entropy(vo
add_device_randomness((const void *)&latent_entropy, sizeof(latent_entropy));
}
#else
-static inline void add_latent_entropy(void) {}
-#endif
-
-extern void get_random_bytes(void *buf, size_t nbytes);
-extern int wait_for_random_bytes(void);
-extern int __init random_init(const char *command_line);
-extern bool rng_is_initialized(void);
-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
-extern const struct file_operations random_fops, urandom_fops;
+static inline void add_latent_entropy(void) { }
#endif

+void get_random_bytes(void *buf, size_t nbytes);
+size_t __must_check get_random_bytes_arch(void *buf, size_t nbytes);
u32 get_random_u32(void);
u64 get_random_u64(void);
static inline unsigned int get_random_int(void)
@@ -56,6 +45,14 @@ static inline unsigned long get_random_l
#endif
}

+unsigned long randomize_page(unsigned long start, unsigned long range);
+
+int __init random_init(const char *command_line);
+bool rng_is_initialized(void);
+int wait_for_random_bytes(void);
+int register_random_ready_notifier(struct notifier_block *nb);
+int unregister_random_ready_notifier(struct notifier_block *nb);
+
/* Calls wait_for_random_bytes() and then calls get_random_bytes(buf, nbytes).
* Returns the result of the call to wait_for_random_bytes. */
static inline int get_random_bytes_wait(void *buf, size_t nbytes)
@@ -79,8 +76,6 @@ declare_get_random_var_wait(int)
declare_get_random_var_wait(long)
#undef declare_get_random_var

-unsigned long randomize_page(unsigned long start, unsigned long range);
-
/*
* This is designed to be standalone for just prandom
* users, but for now we include it from <linux/random.h>
@@ -91,22 +86,10 @@ unsigned long randomize_page(unsigned lo
#ifdef CONFIG_ARCH_RANDOM
# include <asm/archrandom.h>
#else
-static inline bool __must_check arch_get_random_long(unsigned long *v)
-{
- return false;
-}
-static inline bool __must_check arch_get_random_int(unsigned int *v)
-{
- return false;
-}
-static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
-{
- return false;
-}
-static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
-{
- return false;
-}
+static inline bool __must_check arch_get_random_long(unsigned long *v) { return false; }
+static inline bool __must_check arch_get_random_int(unsigned int *v) { return false; }
+static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { return false; }
+static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { return false; }
#endif

/*
@@ -130,8 +113,12 @@ static inline bool __init arch_get_rando
#endif

#ifdef CONFIG_SMP
-extern int random_prepare_cpu(unsigned int cpu);
-extern int random_online_cpu(unsigned int cpu);
+int random_prepare_cpu(unsigned int cpu);
+int random_online_cpu(unsigned int cpu);
+#endif
+
+#ifndef MODULE
+extern const struct file_operations random_fops, urandom_fops;
#endif

#endif /* _LINUX_RANDOM_H */