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[SCSI] fcoe: Use per-CPU kernel function for dev_stats instead of an array

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Remove the hotplug creation of dev_stats, we allocate for all possible CPUs
now when we allocate the lport.

v2: Durring the 2.6.30 merge window, before these patches were comitted,
'percpu_ptr' was renamed 'per_cpu_ptr'. This latest update updates this
patch for the name change.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Robert Love
2009-03-31 15:51:50 -07:00
committed by James Bottomley
parent 5e5e92df49
commit 582b45bc57
5 changed files with 53 additions and 145 deletions
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23
include/scsi/libfc.h
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@@ -22,6 +22,7 @@
#include <linux/timer.h>
#include <linux/if.h>
#include <linux/percpu.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
@@ -661,7 +662,8 @@ struct fc_lport {
unsigned long boot_time;
struct fc_host_statistics host_stats;
struct fcoe_dev_stats *dev_stats[NR_CPUS];
struct fcoe_dev_stats *dev_stats;
u64 wwpn;
u64 wwnn;
u8 retry_count;
@@ -722,6 +724,25 @@ static inline void fc_lport_state_enter(struct fc_lport *lp,
lp->state = state;
}
static inline int fc_lport_init_stats(struct fc_lport *lp)
{
/* allocate per cpu stats block */
lp->dev_stats = alloc_percpu(struct fcoe_dev_stats);
if (!lp->dev_stats)
return -ENOMEM;
return 0;
}
static inline void fc_lport_free_stats(struct fc_lport *lp)
{
free_percpu(lp->dev_stats);
}
static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp)
{
return per_cpu_ptr(lp->dev_stats, smp_processor_id());
}
/*
* LOCAL PORT LAYER