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[PATCH] count_vm_events-warning-fix

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- Prevent things like this:

	block/ll_rw_blk.c: In function 'submit_bio':
	block/ll_rw_blk.c:3222: warning: unused variable 'count'

  inlines are very, very preferable to macros.

- remove unused get_cpu_vm_events() macro

Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2007-02-10 01:44:41 -08:00 committed by Linus Torvalds
parent 7131b6d167
commit 780a065668
1 changed files with 29 additions and 18 deletions
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47
include/linux/vmstat.h
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@ -7,18 +7,6 @@
#include <linux/mmzone.h>
#include <asm/atomic.h>
#ifdef CONFIG_VM_EVENT_COUNTERS
/*
* Light weight per cpu counter implementation.
*
* 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.
*/
#ifdef CONFIG_ZONE_DMA
#define DMA_ZONE(xx) xx##_DMA,
#else
@ -52,6 +40,17 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
NR_VM_EVENT_ITEMS
};
#ifdef CONFIG_VM_EVENT_COUNTERS
/*
* Light weight per cpu counter implementation.
*
* Counters should only be incremented and no critical kernel component
* should rely on the counter values.
*
* Counters are handled completely inline. On many platforms the code
* generated will simply be the increment of a global address.
*/
struct vm_event_state {
unsigned long event[NR_VM_EVENT_ITEMS];
};
@ -92,12 +91,24 @@ static inline void vm_events_fold_cpu(int cpu)
#else
/* Disable counters */
#define get_cpu_vm_events(e) 0L
#define count_vm_event(e) do { } while (0)
#define count_vm_events(e,d) do { } while (0)
#define __count_vm_event(e) do { } while (0)
#define __count_vm_events(e,d) do { } while (0)
#define vm_events_fold_cpu(x) do { } while (0)
static inline void count_vm_event(enum vm_event_item item)
{
}
static inline void count_vm_events(enum vm_event_item item, long delta)
{
}
static inline void __count_vm_event(enum vm_event_item item)
{
}
static inline void __count_vm_events(enum vm_event_item item, long delta)
{
}
static inline void all_vm_events(unsigned long *ret)
{
}
static inline void vm_events_fold_cpu(int cpu)
{
}
#endif /* CONFIG_VM_EVENT_COUNTERS */