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Commit 4edb0748 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

vmstat: create fold_diff 



Both functions that update global counters use the same mechanism.

Create a function that contains the common code.

Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Tejun Heo <tj@kernel.org>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2bb921e5

mm/vmstat.c

+11 −7
Original line number Diff line number Diff line
@@ -414,6 +414,15 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item) 
EXPORT_SYMBOL(dec_zone_page_state);

#endif



static inline void fold_diff(int *diff)

{

	int i;



	for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)

		if (diff[i])

			atomic_long_add(diff[i], &vm_stat[i]);

}



/*

 * Update the zone counters for the current cpu.

 *
@@ -483,10 +492,7 @@ static void refresh_cpu_vm_stats(int cpu) 
			drain_zone_pages(zone, &p->pcp);

#endif

	}



	for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)

		if (global_diff[i])

			atomic_long_add(global_diff[i], &vm_stat[i]);

	fold_diff(global_diff);

}



/*
@@ -516,9 +522,7 @@ void cpu_vm_stats_fold(int cpu) 
			}

	}



	for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)

		if (global_diff[i])

			atomic_long_add(global_diff[i], &vm_stat[i]);

	fold_diff(global_diff);

}



/*