diff options
| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-09-19 01:36:58 +0200 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-09-19 02:13:17 +0200 |
| commit | 93afe0b75ef3675ca05320919a57de8b9bbb159c (patch) | |
| tree | 7b2e5eb82d4f8e7c836a21a1aaf1aa2c0342488b /drivers/xen/evtchn.c | |
| parent | xen/evtchn: track enabled state for each port (diff) | |
| download | linux-93afe0b75ef3675ca05320919a57de8b9bbb159c.tar.xz linux-93afe0b75ef3675ca05320919a57de8b9bbb159c.zip | |
xen/evtchn: dynamically allocate port_user array
We only need the array when running as a Xen domain, so dynamically
allocate it as needed to save on bss space.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen/evtchn.c')
| -rw-r--r-- | drivers/xen/evtchn.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c index 4356a9a030df..709c32d949bf 100644 --- a/drivers/xen/evtchn.c +++ b/drivers/xen/evtchn.c @@ -73,7 +73,7 @@ struct per_user_data { * Who's bound to each port? This is logically an array of struct * per_user_data *, but we encode the current enabled-state in bit 0. */ -static unsigned long port_user[NR_EVENT_CHANNELS]; +static unsigned long *port_user; static DEFINE_SPINLOCK(port_user_lock); /* protects port_user[] and ring_prod */ static inline struct per_user_data *get_port_user(unsigned port) @@ -522,8 +522,11 @@ static int __init evtchn_init(void) if (!xen_domain()) return -ENODEV; + port_user = kcalloc(NR_EVENT_CHANNELS, sizeof(*port_user), GFP_KERNEL); + if (port_user == NULL) + return -ENOMEM; + spin_lock_init(&port_user_lock); - memset(port_user, 0, sizeof(port_user)); /* Create '/dev/misc/evtchn'. */ err = misc_register(&evtchn_miscdev); @@ -539,6 +542,9 @@ static int __init evtchn_init(void) static void __exit evtchn_cleanup(void) { + kfree(port_user); + port_user = NULL; + misc_deregister(&evtchn_miscdev); } |