[trace:ftrace/direct 12/25] kernel/trace/trace.c:7586:28: sparse: sparse: incorrect type in initializer (different base types)

[trace:ftrace/direct 12/25] kernel/trace/trace.c:7586:28: sparse: sparse: incorrect type in initializer (different base types)

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/direct
head:   55a126a7dd387d745cd079c562fd51bbeb85246b
commit: 7d11142685e07035bebd249a31881c1b3ab6a9b1 [12/25] ftrace: Add information on number of page groups allocated
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-dirty
        git checkout 7d11142685e07035bebd249a31881c1b3ab6a9b1
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

   kernel/trace/trace.c:4999:1: sparse: sparse: trying to concatenate 10528-character string (8191 bytes max)
   kernel/trace/trace.c:919:6: sparse: sparse: symbol 'tracing_snapshot_instance_cond' was not declared. Should it be static?
   kernel/trace/trace.h:1415:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected struct event_filter *filter @@    got struct event_filtestruct event_filter *filter @@
   kernel/trace/trace.h:1415:38: sparse:    expected struct event_filter *filter
   kernel/trace/trace.h:1415:38: sparse:    got struct event_filter [noderef] <asn:4> *filter
   kernel/trace/trace.c:2730:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected struct trace_export **list @@    got struct trace_exporstruct trace_export **list @@
   kernel/trace/trace.c:2730:28: sparse:    expected struct trace_export **list
   kernel/trace/trace.c:2730:28: sparse:    got struct trace_export [noderef] <asn:4> **
   kernel/trace/trace.c:2682:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/trace/trace.c:2682:9: sparse:    struct trace_export [noderef] <asn:4> *
   kernel/trace/trace.c:2682:9: sparse:    struct trace_export *
   kernel/trace/trace.c:2744:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected struct trace_export **list @@    got struct trace_exporstruct trace_export **list @@
   kernel/trace/trace.c:2744:33: sparse:    expected struct trace_export **list
   kernel/trace/trace.c:2744:33: sparse:    got struct trace_export [noderef] <asn:4> **
   kernel/trace/trace.c:2690:38: sparse: sparse: incorrect type in assignment (different address spaces) @@    expected struct trace_export **[assigned] p @@    got struct struct trace_export **[assigned] p @@
   kernel/trace/trace.c:2690:38: sparse:    expected struct trace_export **[assigned] p
   kernel/trace/trace.c:2690:38: sparse:    got struct trace_export [noderef] <asn:4> **
   kernel/trace/trace.c:2697:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/trace/trace.c:2697:9: sparse:    struct trace_export [noderef] <asn:4> *
   kernel/trace/trace.c:2697:9: sparse:    struct trace_export *
   kernel/trace/trace.c:2998:46: sparse: sparse: incorrect type in initializer (different address spaces) @@    expected void const [noderef] <asn:3> *__vpp_verify @@    got id const [noderef] <asn:3> *__vpp_verify @@
   kernel/trace/trace.c:2998:46: sparse:    expected void const [noderef] <asn:3> *__vpp_verify
   kernel/trace/trace.c:2998:46: sparse:    got struct trace_buffer_struct *
   kernel/trace/trace.c:3014:9: sparse: sparse: incorrect type in initializer (different address spaces) @@    expected void const [noderef] <asn:3> *__vpp_verify @@    got :3> *__vpp_verify @@
   kernel/trace/trace.c:3014:9: sparse:    expected void const [noderef] <asn:3> *__vpp_verify
   kernel/trace/trace.c:3014:9: sparse:    got int *
   kernel/trace/trace.c:3021:17: sparse: sparse: incorrect type in assignment (different address spaces) @@    expected struct trace_buffer_struct *buffers @@    got struct trace_buffestruct trace_buffer_struct *buffers @@
   kernel/trace/trace.c:3021:17: sparse:    expected struct trace_buffer_struct *buffers
   kernel/trace/trace.c:3021:17: sparse:    got struct trace_buffer_struct [noderef] <asn:3> *
>> kernel/trace/trace.c:7586:28: sparse: sparse: incorrect type in initializer (different base types) @@    expected unsigned long *p @@    got unsigned long extern [addressabunsigned long *p @@
>> kernel/trace/trace.c:7586:28: sparse:    expected unsigned long *p
>> kernel/trace/trace.c:7586:28: sparse:    got unsigned long extern [addressable] [toplevel] ftrace_update_tot_cnt

vim +7586 kernel/trace/trace.c

  7581	
  7582	static ssize_t
  7583	tracing_read_dyn_info(struct file *filp, char __user *ubuf,
  7584			  size_t cnt, loff_t *ppos)
  7585	{
> 7586		unsigned long *p = ftrace_update_tot_cnt;
  7587		ssize_t ret;
  7588		char *buf;
  7589		int r;
  7590	
  7591		r = snprintf(NULL, 0, "%ld pages:%d groups: %d\n");
  7592		r++;
  7593		buf = kmalloc(r, GFP_KERNEL);
  7594		if (!buf)
  7595			return -ENOMEM;
  7596	
  7597		r = scnprintf(buf, r, "%ld pages:%d groups: %d\n",
  7598			ftrace_update_tot_cnt,
  7599			ftrace_number_of_pages,
  7600			ftrace_number_of_groups);
  7601	
  7602		ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
  7603	}
  7604	

---
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