s390/sclp_early: Pass sccb pointer to every *_detect() function

Add a sccb pointer parameter to *_detect() functions instead of accessing
the global sccb_early variable directly.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index dc4ed04..1af3555 100644 (file)
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -87,10 +87,8 @@ static int __init sclp_read_info_early(struct read_info_sccb *sccb)
        return -EIO;
 }
 
-static void __init sclp_facilities_detect(void)
+static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 {
-       struct read_info_sccb *sccb = (void *) &sccb_early;
-
        if (sclp_read_info_early(sccb))
                return;
 
@@ -181,11 +179,10 @@ static void __init sccb_init_eq_size(struct sdias_sccb *sccb)
        sccb->evbuf.dbs = 1;
 }
 
-static int __init sclp_set_event_mask(unsigned long receive_mask,
+static int __init sclp_set_event_mask(struct init_sccb *sccb,
+                                     unsigned long receive_mask,
                                      unsigned long send_mask)
 {
-       struct init_sccb *sccb = (void *) &sccb_early;
-
        memset(sccb, 0, sizeof(*sccb));
        sccb->header.length = sizeof(*sccb);
        sccb->mask_length = sizeof(sccb_mask_t);
@@ -194,10 +191,8 @@ static int __init sclp_set_event_mask(unsigned long receive_mask,
        return sclp_cmd_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
 }
 
-static long __init sclp_hsa_size_init(void)
+static long __init sclp_hsa_size_init(struct sdias_sccb *sccb)
 {
-       struct sdias_sccb *sccb = (void *) &sccb_early;
-
        sccb_init_eq_size(sccb);
        if (sclp_cmd_early(SCLP_CMDW_WRITE_EVENT_DATA, sccb))
                return -EIO;
@@ -206,10 +201,8 @@ static long __init sclp_hsa_size_init(void)
        return 0;
 }
 
-static long __init sclp_hsa_copy_wait(void)
+static long __init sclp_hsa_copy_wait(struct sccb_header *sccb)
 {
-       struct sccb_header *sccb = (void *) &sccb_early;
-
        memset(sccb, 0, PAGE_SIZE);
        sccb->length = PAGE_SIZE;
        if (sclp_cmd_early(SCLP_CMDW_READ_EVENT_DATA, sccb))
@@ -222,25 +215,25 @@ unsigned long sclp_get_hsa_size(void)
        return sclp_hsa_size;
 }
 
-static void __init sclp_hsa_size_detect(void)
+static void __init sclp_hsa_size_detect(void *sccb)
 {
        long size;
 
        /* First try synchronous interface (LPAR) */
-       if (sclp_set_event_mask(0, 0x40000010))
+       if (sclp_set_event_mask(sccb, 0, 0x40000010))
                return;
-       size = sclp_hsa_size_init();
+       size = sclp_hsa_size_init(sccb);
        if (size < 0)
                return;
        if (size != 0)
                goto out;
        /* Then try asynchronous interface (z/VM) */
-       if (sclp_set_event_mask(0x00000010, 0x40000010))
+       if (sclp_set_event_mask(sccb, 0x00000010, 0x40000010))
                return;
-       size = sclp_hsa_size_init();
+       size = sclp_hsa_size_init(sccb);
        if (size < 0)
                return;
-       size = sclp_hsa_copy_wait();
+       size = sclp_hsa_copy_wait(sccb);
        if (size < 0)
                return;
 out:
@@ -249,7 +242,9 @@ out:
 
 void __init sclp_early_detect(void)
 {
-       sclp_facilities_detect();
-       sclp_hsa_size_detect();
-       sclp_set_event_mask(0, 0);
+       void *sccb = &sccb_early;
+
+       sclp_facilities_detect(sccb);
+       sclp_hsa_size_detect(sccb);
+       sclp_set_event_mask(sccb, 0, 0);
 }