kernel/trace/trace_snapshot.c:51:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0fcb05b72344f40806cbe810de8872f1698bf053
commit: bade44fe546212e142befb69ba22f34944030a99 tracing: Move snapshot code out of trace.c and into trace_snapshot.c
date:   7 months ago
config: hexagon-randconfig-r2110-20261014 (https://download.01.org/0day-ci/archive/20261015/202610150045.WoETcMQu-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project e1354f31346666c78d758cee13692ea3b1fe3ec2)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261015/202610150045.WoETcMQu-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: bade44fe5462 ("tracing: Move snapshot code out of trace.c and into trace_snapshot.c")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610150045.WoETcMQu-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/trace/trace_snapshot.c:51:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      51 |                 trace_array_puts(tr, "*** SNAPSHOT CALLED FROM NMI CONTEXT ***\n");
         |                 ^
   kernel/trace/trace_snapshot.c:51:3: note: did you mean 'trace_array_put'?
   include/linux/trace.h:84:20: note: 'trace_array_put' declared here
      84 | static inline void trace_array_put(struct trace_array *tr)
         |                    ^
   kernel/trace/trace_snapshot.c:57:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      57 |                 trace_array_puts(tr, "*** SNAPSHOT NOT ALLOCATED ***\n");
         |                 ^
   kernel/trace/trace_snapshot.c:64:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      64 |                 trace_array_puts(tr, "*** BUFFER MEMORY MAPPED ***\n");
         |                 ^
   kernel/trace/trace_snapshot.c:71:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      71 |                 trace_array_puts(tr, "*** LATENCY TRACER ACTIVE ***\n");
         |                 ^
>> kernel/trace/trace_snapshot.c:251:6: error: redefinition of 'tracing_snapshot_alloc'
     251 | void tracing_snapshot_alloc(void)
         |      ^
   include/linux/trace_printk.h:188:20: note: previous definition is here
     188 | static inline void tracing_snapshot_alloc(void) { }
         |                    ^
   kernel/trace/trace_snapshot.c:1065:3: error: call to undeclared function 'trace_array_puts'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1065 |                 trace_array_puts(tr, "** Boot snapshot taken **\n");
         |                 ^
   6 errors generated.


vim +/trace_array_puts +51 kernel/trace/trace_snapshot.c

    36	
    37	
    38	static int __init boot_snapshot(char *str)
    39	{
    40		snapshot_at_boot = true;
    41		boot_alloc_snapshot(str);
    42		return 1;
    43	}
    44	__setup("ftrace_boot_snapshot", boot_snapshot);
    45	static void tracing_snapshot_instance_cond(struct trace_array *tr,
    46						   void *cond_data)
    47	{
    48		unsigned long flags;
    49	
    50		if (in_nmi()) {
  > 51			trace_array_puts(tr, "*** SNAPSHOT CALLED FROM NMI CONTEXT ***\n");
    52			trace_array_puts(tr, "*** snapshot is being ignored        ***\n");
    53			return;
    54		}
    55	
    56		if (!tr->allocated_snapshot) {
    57			trace_array_puts(tr, "*** SNAPSHOT NOT ALLOCATED ***\n");
    58			trace_array_puts(tr, "*** stopping trace here!   ***\n");
    59			tracer_tracing_off(tr);
    60			return;
    61		}
    62	
    63		if (tr->mapped) {
    64			trace_array_puts(tr, "*** BUFFER MEMORY MAPPED ***\n");
    65			trace_array_puts(tr, "*** Can not use snapshot (sorry) ***\n");
    66			return;
    67		}
    68	
    69		/* Note, snapshot can not be used when the tracer uses it */
    70		if (tracer_uses_snapshot(tr->current_trace)) {
    71			trace_array_puts(tr, "*** LATENCY TRACER ACTIVE ***\n");
    72			trace_array_puts(tr, "*** Can not use snapshot (sorry) ***\n");
    73			return;
    74		}
    75	
    76		local_irq_save(flags);
    77		update_max_tr(tr, current, smp_processor_id(), cond_data);
    78		local_irq_restore(flags);
    79	}
    80	

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