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authorSebastian Ott <sebott@linux.vnet.ibm.com>2013-06-25 15:36:12 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-26 21:10:30 +0200
commita94f0fb1a256455489d475f21c1f902a9280bf9a (patch)
tree69cd52c8a51ad5bff511ac12727d2b07bc76cd1f
parent739737efb57d74c71355c56cf5538048c9510507 (diff)
s390/appldata_mem: do not use static data
Using static data for fields which are accessed by HW will fail if the driver is build as a module (since this would be vmalloc'ed memory). This Bug was revealed via "s390: remove virt_to_phys implementation" - the old virt_to_phys implementation would have translated the address but it was not guaranteed that the memory was contiguous. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/appldata/appldata_mem.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
index 7ef60b52d6e0..42be53743133 100644
--- a/arch/s390/appldata/appldata_mem.c
+++ b/arch/s390/appldata/appldata_mem.c
@@ -32,7 +32,7 @@
* book:
* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
-static struct appldata_mem_data {
+struct appldata_mem_data {
u64 timestamp;
u32 sync_count_1; /* after VM collected the record data, */
u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
@@ -63,7 +63,7 @@ static struct appldata_mem_data {
u64 pgmajfault; /* page faults (major only) */
// <-- New in 2.6
-} __attribute__((packed)) appldata_mem_data;
+} __packed;
/*
@@ -118,7 +118,6 @@ static struct appldata_ops ops = {
.record_nr = APPLDATA_RECORD_MEM_ID,
.size = sizeof(struct appldata_mem_data),
.callback = &appldata_get_mem_data,
- .data = &appldata_mem_data,
.owner = THIS_MODULE,
.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
};
@@ -131,7 +130,17 @@ static struct appldata_ops ops = {
*/
static int __init appldata_mem_init(void)
{
- return appldata_register_ops(&ops);
+ int ret;
+
+ ops.data = kzalloc(sizeof(struct appldata_mem_data), GFP_KERNEL);
+ if (!ops.data)
+ return -ENOMEM;
+
+ ret = appldata_register_ops(&ops);
+ if (ret)
+ kfree(ops.data);
+
+ return ret;
}
/*
@@ -142,6 +151,7 @@ static int __init appldata_mem_init(void)
static void __exit appldata_mem_exit(void)
{
appldata_unregister_ops(&ops);
+ kfree(ops.data);
}