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Subject[PATCH] ocfs2: use bitmap_weight()
Date
Use bitmap_weight instead of reinventing the wheel.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: ocfs2-devel@oss.oracle.com
---
fs/ocfs2/cluster/heartbeat.c | 22 +++++++---------------
1 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 120fad9..7542566 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -35,6 +35,7 @@
#include <linux/time.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
+#include <linux/bitmap.h>

#include "heartbeat.h"
#include "tcp.h"
@@ -282,15 +283,6 @@ struct o2hb_bio_wait_ctxt {
int wc_error;
};

-static int o2hb_pop_count(void *map, int count)
-{
- int i = -1, pop = 0;
-
- while ((i = find_next_bit(map, count, i + 1)) < count)
- pop++;
- return pop;
-}
-
static void o2hb_write_timeout(struct work_struct *work)
{
int failed, quorum;
@@ -307,9 +299,9 @@ static void o2hb_write_timeout(struct work_struct *work)
spin_lock_irqsave(&o2hb_live_lock, flags);
if (test_bit(reg->hr_region_num, o2hb_quorum_region_bitmap))
set_bit(reg->hr_region_num, o2hb_failed_region_bitmap);
- failed = o2hb_pop_count(&o2hb_failed_region_bitmap,
+ failed = bitmap_weight(o2hb_failed_region_bitmap,
O2NM_MAX_REGIONS);
- quorum = o2hb_pop_count(&o2hb_quorum_region_bitmap,
+ quorum = bitmap_weight(o2hb_quorum_region_bitmap,
O2NM_MAX_REGIONS);
spin_unlock_irqrestore(&o2hb_live_lock, flags);

@@ -771,7 +763,7 @@ static void o2hb_set_quorum_device(struct o2hb_region *reg)
* If global heartbeat active, unpin all regions if the
* region count > CUT_OFF
*/
- if (o2hb_pop_count(&o2hb_quorum_region_bitmap,
+ if (bitmap_weight(o2hb_quorum_region_bitmap,
O2NM_MAX_REGIONS) > O2HB_PIN_CUT_OFF)
o2hb_region_unpin(NULL);
unlock:
@@ -1813,7 +1805,7 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
live_threshold = O2HB_LIVE_THRESHOLD;
if (o2hb_global_heartbeat_active()) {
spin_lock(&o2hb_live_lock);
- if (o2hb_pop_count(&o2hb_region_bitmap, O2NM_MAX_REGIONS) == 1)
+ if (bitmap_weight(o2hb_region_bitmap, O2NM_MAX_REGIONS) == 1)
live_threshold <<= 1;
spin_unlock(&o2hb_live_lock);
}
@@ -2164,7 +2156,7 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group,
if (!o2hb_dependent_users)
goto unlock;

- if (o2hb_pop_count(&o2hb_quorum_region_bitmap,
+ if (bitmap_weight(o2hb_quorum_region_bitmap,
O2NM_MAX_REGIONS) <= O2HB_PIN_CUT_OFF)
o2hb_region_pin(NULL);

@@ -2458,7 +2450,7 @@ static int o2hb_region_inc_user(const char *region_uuid)
if (o2hb_dependent_users > 1)
goto unlock;

- if (o2hb_pop_count(&o2hb_quorum_region_bitmap,
+ if (bitmap_weight(o2hb_quorum_region_bitmap,
O2NM_MAX_REGIONS) <= O2HB_PIN_CUT_OFF)
ret = o2hb_region_pin(NULL);

--
1.7.4.4


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