#include <linux/types.h>
#include <linux/percpu.h>
-#include <linux/config.h>
#include <linux/mmzone.h>
#include <asm/atomic.h>
/*
* Light weight per cpu counter implementation.
*
- * Counters should only be incremented and no critical kernel component
- * should rely on the counter values.
+ * Counters should only be incremented. You need to set EMBEDDED
+ * to disable VM_EVENT_COUNTERS. Things like procps (vmstat,
+ * top, etc) use /proc/vmstat and depend on these counters.
*
* Counters are handled completely inline. On many platforms the code
* generated will simply be the increment of a global address.
*/
-#define FOR_ALL_ZONES(x) x##_DMA, x##_DMA32, x##_NORMAL, x##_HIGH
+#ifdef CONFIG_ZONE_DMA32
+#define DMA32_ZONE(xx) xx##_DMA32,
+#else
+#define DMA32_ZONE(xx)
+#endif
+
+#ifdef CONFIG_HIGHMEM
+#define HIGHMEM_ZONE(xx) , xx##_HIGH
+#else
+#define HIGHMEM_ZONE(xx)
+#endif
+
+#define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx)
enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
FOR_ALL_ZONES(PGALLOC),
static inline void __count_vm_event(enum vm_event_item item)
{
- __get_cpu_var(vm_event_states.event[item])++;
+ __get_cpu_var(vm_event_states).event[item]++;
}
static inline void count_vm_event(enum vm_event_item item)
{
- get_cpu_var(vm_event_states.event[item])++;
+ get_cpu_var(vm_event_states).event[item]++;
put_cpu();
}
static inline void __count_vm_events(enum vm_event_item item, long delta)
{
- __get_cpu_var(vm_event_states.event[item]) += delta;
+ __get_cpu_var(vm_event_states).event[item] += delta;
}
static inline void count_vm_events(enum vm_event_item item, long delta)
{
- get_cpu_var(vm_event_states.event[item])++;
+ get_cpu_var(vm_event_states).event[item] += delta;
put_cpu();
}
extern void all_vm_events(unsigned long *);
+#ifdef CONFIG_HOTPLUG
extern void vm_events_fold_cpu(int cpu);
+#else
+static inline void vm_events_fold_cpu(int cpu)
+{
+}
+#endif
#else
struct zone *zones = NODE_DATA(node)->node_zones;
return
-#ifndef CONFIG_DMA_IS_NORMAL
-#if !defined(CONFIG_DMA_IS_DMA32) && BITS_PER_LONG >= 64
+#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
zone_page_state(&zones[ZONE_NORMAL], item) +
-#endif
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif
zone_page_state_add(delta, zone, item);
}
+static inline void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
+{
+ atomic_long_inc(&zone->vm_stat[item]);
+ atomic_long_inc(&vm_stat[item]);
+}
+
static inline void __inc_zone_page_state(struct page *page,
enum zone_stat_item item)
{
- atomic_long_inc(&page_zone(page)->vm_stat[item]);
- atomic_long_inc(&vm_stat[item]);
+ __inc_zone_state(page_zone(page), item);
}
static inline void __dec_zone_page_state(struct page *page,