[inc][c++] add some additional __BEGIN_CDECL/__END_CDECLS to various global headers

Just a few that were missed, and picked up with some additional C++ code.

arch/include/arch/atomic.h

@@ -46,3 +46,5 @@ static int atomic_or(volatile int *ptr, int val);
 
 #endif
 
+__END_CDECLS
+

arch/include/arch/mp.h

@@ -7,10 +7,15 @@
  */
 #pragma once
 
+#include <lk/compiler.h>
 #include <sys/types.h>
 #include <kernel/mp.h>
 
+__BEGIN_CDECLS
+
 /* send inter processor interrupt, if supported */
 status_t arch_mp_send_ipi(mp_cpu_mask_t target, mp_ipi_t ipi);
 
 void arch_mp_init_percpu(void);
+
+__END_CDECLS

arch/include/arch/thread.h

@@ -9,9 +9,13 @@
 
 // give the arch code a chance to declare the arch_thread struct
 #include <arch/arch_thread.h>
+#include <lk/compiler.h>
+
+__BEGIN_CDECLS
 
 struct thread;
 
 void arch_thread_initialize(struct thread *);
 void arch_context_switch(struct thread *oldthread, struct thread *newthread);
 
+__END_CDECLS

kernel/include/kernel/mp.h

@@ -86,7 +86,7 @@ static inline void mp_init(void) {}
 static inline void mp_reschedule(mp_cpu_mask_t target, uint flags) {}
 static inline void mp_set_curr_cpu_active(bool active) {}
 
-static inline enum handler_return mp_mbx_reschedule_irq(void) { return 0; }
+static inline enum handler_return mp_mbx_reschedule_irq(void) { return INT_NO_RESCHEDULE; }
 
 // only one cpu exists in UP and if you're calling these functions, it's active...
 static inline int mp_is_cpu_active(uint cpu) { return 1; }

kernel/include/kernel/novm.h

@@ -10,6 +10,9 @@
 #include <arch.h>
 #include <stddef.h>
 #include <stdlib.h>
+#include <lk/compiler.h>
+
+__BEGIN_CDECLS
 
 #define PAGE_ALIGN(x) ALIGN(x, PAGE_SIZE)
 #define IS_PAGE_ALIGNED(x) IS_ALIGNED(x, PAGE_SIZE)
@@ -35,3 +38,5 @@ struct page_range {
 };
 
 int novm_get_arenas(struct page_range *ranges, int number_of_ranges);
+
+__END_CDECLS

lib/console/include/lib/console.h

@@ -7,6 +7,9 @@
  */
 #pragma once
 
+#include <lk/compiler.h>
+
+__BEGIN_CDECLS
 
 /* Previously, this file was included to get access to defining a console
  * command. This logic has been moved into the following header, which is
@@ -33,4 +36,4 @@ extern int lastresult;
 #define ENABLE_PANIC_SHELL 1
 #endif
 
-
+__END_CDECLS

lib/console/include/lib/console/cmd.h

@@ -10,6 +10,9 @@
 #include <stdbool.h>
 #include <stddef.h>
 #include <sys/types.h>
+#include <lk/compiler.h>
+
+__BEGIN_CDECLS
 
 /* included from top level lk/console_cmd.h when lib/console is built.
  * Provides definitions for how to register a command block to be picked up by
@@ -50,4 +53,5 @@ typedef struct _cmd_block {
 #define STATIC_COMMAND_MASKED(command_str, help_str, func, availability_mask) \
     { command_str, help_str, func, availability_mask },
 
+__END_CDECLS
 

top/include/lk/console_cmd.h

@@ -12,6 +12,8 @@
 #include <stddef.h>
 #include <sys/types.h>
 
+__BEGIN_CDECLS
+
 /* command args */
 typedef struct {
     const char *str;
@@ -27,6 +29,8 @@ typedef int (*console_cmd_func)(int argc, const console_cmd_args *argv);
 #define CMD_AVAIL_PANIC  (0x1 << 1)
 #define CMD_AVAIL_ALWAYS (CMD_AVAIL_NORMAL | CMD_AVAIL_PANIC)
 
+__END_CDECLS
+
 /* Register a static block of commands at init time when lib/console is
  * paret of the build. Otherwise stub out these definitions so that they do
  * not get included.
@@ -47,4 +51,5 @@ typedef int (*console_cmd_func)(int argc, const console_cmd_args *argv);
 #define STATIC_COMMAND(command_str, help_str, func)
 #define STATIC_COMMAND_MASKED(command_str, help_str, func, availability_mask)
 
+
 #endif

top/include/lk/init.h

@@ -10,6 +10,8 @@
 #include <lk/compiler.h>
 #include <sys/types.h>
 
+__BEGIN_CDECLS
+
 /*
  * LK's init system
  */
@@ -69,3 +71,5 @@ struct lk_init_struct {
 
 #define LK_INIT_HOOK(_name, _hook, _level) \
     LK_INIT_HOOK_FLAGS(_name, _hook, _level, LK_INIT_FLAG_PRIMARY_CPU)
+
+__END_CDECLS

top/include/lk/main.h

@@ -10,7 +10,10 @@
 #include <lk/compiler.h>
 #include <sys/types.h>
 
+__BEGIN_CDECLS
 
 void lk_main(ulong arg0, ulong arg1, ulong arg2, ulong arg3) __NO_RETURN __EXTERNALLY_VISIBLE;
 void lk_secondary_cpu_entry(void);
 void lk_init_secondary_cpus(uint secondary_cpu_count);
+
+__END_CDECLS