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s390/memory hotplug,sclp: get rid of per memory increment usecount 

Given that the memory block size is always larger or equal to
the memory increment size there is no need for a usecount anymore.
Each memory increment belongs to exactly one memory block.
So get rid of the usecount.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2013-05-02 09:20:30 +02:00 committed by Martin Schwidefsky
parent e5d709bb5f
commit 1553556067
1 changed files with 2 additions and 18 deletions
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20
drivers/s390/char/sclp_cmd.c
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@ -345,7 +345,6 @@ struct memory_increment {
struct list_head list;
u16 rn;
int standby;
int usecount;
};
struct assign_storage_sccb {
@ -463,21 +462,10 @@ static int sclp_mem_change_state(unsigned long start, unsigned long size,
break;
if (start > istart + rzm - 1)
continue;
if (online) {
if (incr->usecount++)
continue;
/*
* Don't break the loop if one assign fails. Loop may
* be walked again on CANCEL and we can't save
* information if state changed before or not.
* So continue and increase usecount for all increments.
*/
if (online)
rc |= sclp_assign_storage(incr->rn);
} else {
if (--incr->usecount)
continue;
else
sclp_unassign_storage(incr->rn);
}
}
return rc ? -EIO : 0;
}
@ -561,8 +549,6 @@ static void __init sclp_add_standby_memory(void)
add_memory_merged(0);
}
#define MEM_SCT_SIZE (1UL << SECTION_SIZE_BITS)
static void __init insert_increment(u16 rn, int standby, int assigned)
{
struct memory_increment *incr, *new_incr;
@ -574,8 +560,6 @@ static void __init insert_increment(u16 rn, int standby, int assigned)
return;
new_incr->rn = rn;
new_incr->standby = standby;
if (!standby)
new_incr->usecount = rzm > MEM_SCT_SIZE ? rzm/MEM_SCT_SIZE : 1;
last_rn = 0;
prev = &sclp_mem_list;
list_for_each_entry(incr, &sclp_mem_list, list) {