SMP - fixed compilation and removed warnings

kernel/arch/i386/arch_clock.c

@@ -185,6 +185,10 @@ PUBLIC int register_local_timer_handler(const irq_handler_t handler)
 
 PUBLIC void cycles_accounting_init(void)
 {
+#ifdef CONFIG_SMP
+	unsigned cpu = cpuid;
+#endif
+
 	read_tsc_64(get_cpu_var_ptr(cpu, tsc_ctr_switch));
 
 	make_zero64(get_cpu_var(cpu, cpu_last_tsc));

kernel/arch/i386/arch_smp.c

@@ -11,6 +11,7 @@
 #include "arch_proto.h"
 #include "kernel/glo.h"
 #include <unistd.h>
+#include <stdlib.h>
 #include <machine/cmos.h>
 #include <machine/bios.h>
 #include <minix/portio.h>
@@ -19,6 +20,7 @@
 #include "kernel/smp.h"
 #include "apic.h"
 #include "acpi.h"
+#include "clock.h"
 
 #include "glo.h"
 
@@ -46,7 +48,6 @@ PUBLIC unsigned char cpuid2apicid[CONFIG_MAX_CPUS];
 SPINLOCK_DEFINE(smp_cpu_lock)
 SPINLOCK_DEFINE(dispq_lock)
 
-FORWARD _PROTOTYPE(void smp_init_vars, (void));
 FORWARD _PROTOTYPE(void smp_reinit_vars, (void));
 
 /*
@@ -55,15 +56,14 @@ FORWARD _PROTOTYPE(void smp_reinit_vars, (void));
 PRIVATE phys_bytes copy_trampoline(void)
 {
 	char * s, *end;
-	phys_bytes tramp_base;
+	phys_bytes tramp_base = 0;
 	unsigned tramp_size;
 
 	tramp_size = (unsigned) &__trampoline_end - (unsigned)&trampoline;
 	s = env_get("memory");
-	s = (char *) get_value(params_buffer, "memory");
 	if (!s)
 		return 0;
-	
+
 	while (*s != 0) {
 		phys_bytes base = 0xfffffff;
 		unsigned size;
@@ -175,12 +175,10 @@ PUBLIC void smp_halt_cpu (void)
 PUBLIC void smp_shutdown_aps(void)
 {
 	unsigned cpu;
-	unsigned aid = apicid();
-	unsigned local_cpu = cpuid;
-	
+
 	if (ncpus == 1)
 		goto exit_shutdown_aps;
-	
+
 	/* we must let the other cpus enter the kernel mode */
 	BKL_UNLOCK();
 
@@ -267,7 +265,6 @@ PUBLIC void smp_ap_boot(void)
 
 PRIVATE void smp_reinit_vars(void)
 {
-	int i;
 	lapic_addr = lapic_eoi_addr = 0;
 	ioapic_enabled = 0;
 

kernel/arch/i386/arch_system.c

@@ -511,8 +511,6 @@ PRIVATE void dump_bkl_usage(void)
 
 PRIVATE void reset_bkl_usage(void)
 {
-	unsigned cpu;
-
 	memset(kernel_ticks, 0, sizeof(kernel_ticks));
 	memset(bkl_ticks, 0, sizeof(bkl_ticks));
 	memset(bkl_tries, 0, sizeof(bkl_tries));

kernel/arch/i386/include/arch_proto.h

@@ -178,6 +178,7 @@ extern void * k_stacks;
 #define get_k_stack_top(cpu)	((void *)(((char*)(k_stacks)) \
 					+ 2 * ((cpu) + 1) * K_STACK_SIZE))
 
+_PROTOTYPE( void, mfence(void));
 #define barrier()	do { mfence(); } while(0)
 
 

kernel/arch/i386/memory.c

@@ -908,7 +908,6 @@ PUBLIC int arch_phys_map(const int index,
 		if(lapic_addr)
 			lapic_mapping_index = freeidx++;
 		if (ioapic_enabled) {
-			int i;
 			ioapic_first_index = freeidx;
 			assert(nioapics > 0);
 			freeidx += nioapics;

kernel/arch/i386/pre_init.c

@@ -226,7 +226,7 @@ PRIVATE int mb_set_param(char *name, char *value)
 PRIVATE void get_parameters(multiboot_info_t *mbi) 
 {
 	char mem_value[40], temp[ITOA_BUFFER_SIZE];
-	int i, processor;
+	int i;
 	int dev;
 	int ctrlr;
 	int disk, prim, sub;

kernel/smp.c

@@ -2,6 +2,7 @@
 
 #include "smp.h"
 #include "interrupt.h"
+#include "clock.h"
 
 unsigned ncpus;
 unsigned ht_per_core;

kernel/smp.h

@@ -53,6 +53,7 @@ SPINLOCK_DECLARE(boot_lock)
 	
 _PROTOTYPE(void wait_for_APs_to_finish_booting, (void));
 _PROTOTYPE(void ap_boot_finished, (unsigned cpu));
+_PROTOTYPE(void smp_shutdown_aps, (void ));
 
 /* IPI handlers */
 _PROTOTYPE(void smp_ipi_halt_handler, (void));

kernel/spinlock.h

@@ -28,6 +28,8 @@ typedef struct spinlock {
 #define spinlock_lock(sl)
 #define spinlock_unlock(sl)
 #else
+void arch_spinlock_lock(atomic_t * sl);
+void arch_spinlock_unlock(atomic_t * sl);
 #define spinlock_lock(sl)	arch_spinlock_lock((atomic_t*) sl)
 #define spinlock_unlock(sl)	arch_spinlock_unlock((atomic_t*) sl)
 #endif