From ee480683d975973e3ff679850871e00e011c4a96 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 13 Nov 2013 18:34:55 -0800 Subject: target: Convert se_device statistics to atomic_long_t This patch converts the handful of se_device statistics to type atomic_long_t, instead of using se_device->stats_lock when incrementing these values. More importantly, go ahead and drop the spinlock usage within transport_lookup_cmd_lun() fast-path code. Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_stat.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'drivers/target/target_core_stat.c') diff --git a/drivers/target/target_core_stat.c b/drivers/target/target_core_stat.c index 632665c026a8..03538994d2f7 100644 --- a/drivers/target/target_core_stat.c +++ b/drivers/target/target_core_stat.c @@ -213,7 +213,8 @@ static ssize_t target_stat_scsi_tgt_dev_show_attr_resets( struct se_device *dev = container_of(sgrps, struct se_device, dev_stat_grps); - return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets); + return snprintf(page, PAGE_SIZE, "%lu\n", + atomic_long_read(&dev->num_resets)); } DEV_STAT_SCSI_TGT_DEV_ATTR_RO(resets); @@ -396,8 +397,8 @@ static ssize_t target_stat_scsi_lu_show_attr_num_cmds( container_of(sgrps, struct se_device, dev_stat_grps); /* scsiLuNumCommands */ - return snprintf(page, PAGE_SIZE, "%llu\n", - (unsigned long long)dev->num_cmds); + return snprintf(page, PAGE_SIZE, "%lu\n", + atomic_long_read(&dev->num_cmds)); } DEV_STAT_SCSI_LU_ATTR_RO(num_cmds); @@ -408,7 +409,8 @@ static ssize_t target_stat_scsi_lu_show_attr_read_mbytes( container_of(sgrps, struct se_device, dev_stat_grps); /* scsiLuReadMegaBytes */ - return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->read_bytes >> 20)); + return snprintf(page, PAGE_SIZE, "%lu\n", + atomic_long_read(&dev->read_bytes) >> 20); } DEV_STAT_SCSI_LU_ATTR_RO(read_mbytes); @@ -419,7 +421,8 @@ static ssize_t target_stat_scsi_lu_show_attr_write_mbytes( container_of(sgrps, struct se_device, dev_stat_grps); /* scsiLuWrittenMegaBytes */ - return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->write_bytes >> 20)); + return snprintf(page, PAGE_SIZE, "%lu\n", + atomic_long_read(&dev->write_bytes) >> 20); } DEV_STAT_SCSI_LU_ATTR_RO(write_mbytes); @@ -430,7 +433,7 @@ static ssize_t target_stat_scsi_lu_show_attr_resets( container_of(sgrps, struct se_device, dev_stat_grps); /* scsiLuInResets */ - return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets); + return snprintf(page, PAGE_SIZE, "%lu\n", atomic_long_read(&dev->num_resets)); } DEV_STAT_SCSI_LU_ATTR_RO(resets); -- cgit v1.2.3-55-g7522