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path: root/drivers/s390/char/sclp.c
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Diffstat (limited to 'drivers/s390/char/sclp.c')
-rw-r--r--drivers/s390/char/sclp.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index e9aa71cdfc44..d2ab3f07c008 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -45,8 +45,8 @@ static struct list_head sclp_req_queue;
/* Data for read and and init requests. */
static struct sclp_req sclp_read_req;
static struct sclp_req sclp_init_req;
-static char sclp_read_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
-static char sclp_init_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+static void *sclp_read_sccb;
+static struct init_sccb *sclp_init_sccb;
/* Suspend request */
static DECLARE_COMPLETION(sclp_request_queue_flushed);
@@ -753,9 +753,8 @@ EXPORT_SYMBOL(sclp_remove_processed);
static inline void
__sclp_make_init_req(sccb_mask_t receive_mask, sccb_mask_t send_mask)
{
- struct init_sccb *sccb;
+ struct init_sccb *sccb = sclp_init_sccb;
- sccb = (struct init_sccb *) sclp_init_sccb;
clear_page(sccb);
memset(&sclp_init_req, 0, sizeof(struct sclp_req));
sclp_init_req.command = SCLP_CMDW_WRITE_EVENT_MASK;
@@ -782,7 +781,7 @@ static int
sclp_init_mask(int calculate)
{
unsigned long flags;
- struct init_sccb *sccb = (struct init_sccb *) sclp_init_sccb;
+ struct init_sccb *sccb = sclp_init_sccb;
sccb_mask_t receive_mask;
sccb_mask_t send_mask;
int retry;
@@ -1175,6 +1174,9 @@ sclp_init(void)
if (sclp_init_state != sclp_init_state_uninitialized)
goto fail_unlock;
sclp_init_state = sclp_init_state_initializing;
+ sclp_read_sccb = (void *) __get_free_page(GFP_ATOMIC | GFP_DMA);
+ sclp_init_sccb = (void *) __get_free_page(GFP_ATOMIC | GFP_DMA);
+ BUG_ON(!sclp_read_sccb || !sclp_init_sccb);
/* Set up variables */
INIT_LIST_HEAD(&sclp_req_queue);
INIT_LIST_HEAD(&sclp_reg_list);
@@ -1207,6 +1209,8 @@ fail_unregister_reboot_notifier:
unregister_reboot_notifier(&sclp_reboot_notifier);
fail_init_state_uninitialized:
sclp_init_state = sclp_init_state_uninitialized;
+ free_page((unsigned long) sclp_read_sccb);
+ free_page((unsigned long) sclp_init_sccb);
fail_unlock:
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;