bulk: Do not declare function prototypes using 'extern' keyword

By default, C function prototypes declared in headers are visible,
so there is no need to declare them as 'extern' functions.
Remove this redundancy in a single bulk commit; do not modify:

  - meson.build (used to check function availability at runtime)
  - pc-bios/
  - libdecnumber/
  - tests/
  - *.c

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20230605175647.88395-5-philmd@linaro.org>

5 files changed, 16 insertions, 16 deletions

diff --git a/include/qemu/crc-ccitt.h b/include/qemu/crc-ccitt.h
index d6eb49146d..8918dafe07 100644
--- a/include/qemu/crc-ccitt.h
+++ b/include/qemu/crc-ccitt.h
@@ -17,8 +17,8 @@
 extern uint16_t const crc_ccitt_table[256];
 extern uint16_t const crc_ccitt_false_table[256];
 
-extern uint16_t crc_ccitt(uint16_t crc, const uint8_t *buffer, size_t len);
-extern uint16_t crc_ccitt_false(uint16_t crc, const uint8_t *buffer, size_t len);
+uint16_t crc_ccitt(uint16_t crc, const uint8_t *buffer, size_t len);
+uint16_t crc_ccitt_false(uint16_t crc, const uint8_t *buffer, size_t len);
 
 static inline uint16_t crc_ccitt_byte(uint16_t crc, const uint8_t c)
 {
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 2cae135280..2897720fac 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -250,7 +250,7 @@ extern "C" {
  * supports QEMU_ERROR, this will be reported at compile time; otherwise
  * this will be reported at link time due to the missing symbol.
  */
-G_NORETURN extern
+G_NORETURN
 void QEMU_ERROR("code path is reachable")
     qemu_build_not_reached_always(void);
 #if defined(__OPTIMIZE__) && !defined(__NO_INLINE__)
@@ -506,7 +506,7 @@ void qemu_anon_ram_free(void *ptr, size_t size);
  * See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for discussion
  * about Solaris missing the madvise() prototype.
  */
-extern int madvise(char *, size_t, int);
+int madvise(char *, size_t, int);
 #endif
 
 #if defined(CONFIG_LINUX)
diff --git a/include/qemu/rcu.h b/include/qemu/rcu.h
index 661c1a1468..fea058aa9f 100644
--- a/include/qemu/rcu.h
+++ b/include/qemu/rcu.h
@@ -118,19 +118,19 @@ static inline void rcu_read_unlock(void)
     }
 }
 
-extern void synchronize_rcu(void);
+void synchronize_rcu(void);
 
 /*
  * Reader thread registration.
  */
-extern void rcu_register_thread(void);
-extern void rcu_unregister_thread(void);
+void rcu_register_thread(void);
+void rcu_unregister_thread(void);
 
 /*
  * Support for fork().  fork() support is enabled at startup.
  */
-extern void rcu_enable_atfork(void);
-extern void rcu_disable_atfork(void);
+void rcu_enable_atfork(void);
+void rcu_disable_atfork(void);
 
 struct rcu_head;
 typedef void RCUCBFunc(struct rcu_head *head);
@@ -140,8 +140,8 @@ struct rcu_head {
     RCUCBFunc *func;
 };
 
-extern void call_rcu1(struct rcu_head *head, RCUCBFunc *func);
-extern void drain_call_rcu(void);
+void call_rcu1(struct rcu_head *head, RCUCBFunc *func);
+void drain_call_rcu(void);
 
 /* The operands of the minus operator must have the same type,
  * which must be the one that we specify in the cast.
diff --git a/include/qemu/sys_membarrier.h b/include/qemu/sys_membarrier.h
index b5bfa21d52..e7774891f8 100644
--- a/include/qemu/sys_membarrier.h
+++ b/include/qemu/sys_membarrier.h
@@ -14,8 +14,8 @@
  * side.  The slow side forces processor-level ordering on all other cores
  * through a system call.
  */
-extern void smp_mb_global_init(void);
-extern void smp_mb_global(void);
+void smp_mb_global_init(void);
+void smp_mb_global(void);
 #define smp_mb_placeholder()       barrier()
 #else
 /* Keep it simple, execute a real memory barrier on both sides.  */
diff --git a/include/qemu/uri.h b/include/qemu/uri.h
index 2875c51417..1855b764f2 100644
--- a/include/qemu/uri.h
+++ b/include/qemu/uri.h
@@ -96,8 +96,8 @@ typedef struct QueryParams {
   QueryParam *p;       /* array of parameters */
 } QueryParams;
 
-QueryParams *query_params_new (int init_alloc);
-extern QueryParams *query_params_parse (const char *query);
-extern void query_params_free (QueryParams *ps);
+QueryParams *query_params_new(int init_alloc);
+QueryParams *query_params_parse(const char *query);
+void query_params_free(QueryParams *ps);
 
 #endif /* QEMU_URI_H */