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zcache: The last of the atomic reads has now an accessory function.

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And now we can move the code ([inc|dec]_zcache_[*]) to their own file
with a header to make them nops or feed in debugfs.

Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konrad Rzeszutek Wilk 2013-03-04 13:18:14 -05:00 committed by Greg Kroah-Hartman
parent 6f4336fbbe
commit e0d11aed19
1 changed files with 9 additions and 4 deletions
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13
drivers/staging/zcache/zcache-main.c
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@ -253,6 +253,14 @@ static inline void dec_zcache_pers_zpages(unsigned zpages)
{
zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
}
static inline unsigned long curr_pageframes_count(void)
{
return zcache_pageframes_alloced -
atomic_read(&zcache_pageframes_freed_atomic) -
atomic_read(&zcache_eph_pageframes_atomic) -
atomic_read(&zcache_pers_pageframes_atomic);
};
/* but for the rest of these, counting races are ok */
static ssize_t zcache_flush_total;
static ssize_t zcache_flush_found;
@ -565,10 +573,7 @@ static void zcache_free_page(struct page *page)
BUG();
__free_page(page);
inc_zcache_pageframes_freed();
curr_pageframes = zcache_pageframes_alloced -
atomic_read(&zcache_pageframes_freed_atomic) -
atomic_read(&zcache_eph_pageframes_atomic) -
atomic_read(&zcache_pers_pageframes_atomic);
curr_pageframes = curr_pageframes_count();
if (curr_pageframes > max_pageframes)
max_pageframes = curr_pageframes;
if (curr_pageframes < min_pageframes)