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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-06-25 15:36:12 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-06-26 21:10:30 +0200 |
| commit | a94f0fb1a256455489d475f21c1f902a9280bf9a (patch) | |
| tree | 69cd52c8a51ad5bff511ac12727d2b07bc76cd1f /arch/s390/appldata | |
| parent | s390/vmwatchdog: do not use static data (diff) | |
| download | linux-a94f0fb1a256455489d475f21c1f902a9280bf9a.tar.xz linux-a94f0fb1a256455489d475f21c1f902a9280bf9a.zip | |
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>
Diffstat (limited to 'arch/s390/appldata')
| -rw-r--r-- | arch/s390/appldata/appldata_mem.c | 18 |
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); } |