tracing: Use RING_BUFFER_ALL_CPUS for TRACE_PIPE_ALL_CPU

Both RING_BUFFER_ALL_CPUS and TRACE_PIPE_ALL_CPU are defined as
-1 and used to say that all the ring buffers are to be modified
or read (instead of just a single cpu, which would be >= 0).

There's no reason to keep TRACE_PIPE_ALL_CPU as it is also started
to be used for more than what it was created for, and now that
the ring buffer code added a generic RING_BUFFER_ALL_CPUS define,
we can clean up the trace code to use that instead and remove
the TRACE_PIPE_ALL_CPU macro.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

3 files changed, 16 insertions, 18 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 932931897b8d..59953aa28845 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -287,13 +287,13 @@ static DEFINE_PER_CPU(struct mutex, cpu_access_lock);
 
 static inline void trace_access_lock(int cpu)
 {
-        if (cpu == TRACE_PIPE_ALL_CPU) {
+        if (cpu == RING_BUFFER_ALL_CPUS) {
                 /* gain it for accessing the whole ring buffer. */
                 down_write(&all_cpu_access_lock);
         } else {
                 /* gain it for accessing a cpu ring buffer. */
 
-                /* Firstly block other trace_access_lock(TRACE_PIPE_ALL_CPU). */
+                /* Firstly block other trace_access_lock(RING_BUFFER_ALL_CPUS). */
                 down_read(&all_cpu_access_lock);
 
                 /* Secondly block other access to this @cpu ring buffer. */
@@ -303,7 +303,7 @@ static inline void trace_access_lock(int cpu)
 
 static inline void trace_access_unlock(int cpu)
 {
-        if (cpu == TRACE_PIPE_ALL_CPU) {
+        if (cpu == RING_BUFFER_ALL_CPUS) {
                 up_write(&all_cpu_access_lock);
         } else {
                 mutex_unlock(&per_cpu(cpu_access_lock, cpu));
@@ -1823,7 +1823,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu,
          * If we are in a per_cpu trace file, don't bother by iterating over
          * all cpu and peek directly.
          */
-        if (cpu_file > TRACE_PIPE_ALL_CPU) {
+        if (cpu_file > RING_BUFFER_ALL_CPUS) {
                 if (ring_buffer_empty_cpu(buffer, cpu_file))
                         return NULL;
                 ent = peek_next_entry(iter, cpu_file, ent_ts, missing_events);
@@ -1983,7 +1983,7 @@ static void *s_start(struct seq_file *m, loff_t *pos)
                 iter->cpu = 0;
                 iter->idx = -1;
 
-                if (cpu_file == TRACE_PIPE_ALL_CPU) {
+                if (cpu_file == RING_BUFFER_ALL_CPUS) {
                         for_each_tracing_cpu(cpu)
                                 tracing_iter_reset(iter, cpu);
                 } else
@@ -2291,7 +2291,7 @@ int trace_empty(struct trace_iterator *iter)
         int cpu;
 
         /* If we are looking at one CPU buffer, only check that one */
-        if (iter->cpu_file != TRACE_PIPE_ALL_CPU) {
+        if (iter->cpu_file != RING_BUFFER_ALL_CPUS) {
                 cpu = iter->cpu_file;
                 buf_iter = trace_buffer_iter(iter, cpu);
                 if (buf_iter) {
@@ -2533,7 +2533,7 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
         if (!iter->snapshot)
                 tracing_stop();
 
-        if (iter->cpu_file == TRACE_PIPE_ALL_CPU) {
+        if (iter->cpu_file == RING_BUFFER_ALL_CPUS) {
                 for_each_tracing_cpu(cpu) {
                         iter->buffer_iter[cpu] =
                                 ring_buffer_read_prepare(iter->tr->buffer, cpu);
@@ -2617,7 +2617,7 @@ static int tracing_open(struct inode *inode, struct file *file)
             (file->f_flags & O_TRUNC)) {
                 long cpu = (long) inode->i_private;
 
-                if (cpu == TRACE_PIPE_ALL_CPU)
+                if (cpu == RING_BUFFER_ALL_CPUS)
                         tracing_reset_online_cpus(&global_trace);
                 else
                         tracing_reset(&global_trace, cpu);
@@ -5035,7 +5035,7 @@ static __init int tracer_init_debugfs(void)
                         NULL, &tracing_cpumask_fops);
 
         trace_create_file("trace", 0644, d_tracer,
-                        (void *) TRACE_PIPE_ALL_CPU, &tracing_fops);
+                        (void *) RING_BUFFER_ALL_CPUS, &tracing_fops);
 
         trace_create_file("available_tracers", 0444, d_tracer,
                         &global_trace, &show_traces_fops);
@@ -5055,7 +5055,7 @@ static __init int tracer_init_debugfs(void)
                         NULL, &tracing_readme_fops);
 
         trace_create_file("trace_pipe", 0444, d_tracer,
-                        (void *) TRACE_PIPE_ALL_CPU, &tracing_pipe_fops);
+                        (void *) RING_BUFFER_ALL_CPUS, &tracing_pipe_fops);
 
         trace_create_file("buffer_size_kb", 0644, d_tracer,
                         (void *) RING_BUFFER_ALL_CPUS, &tracing_entries_fops);
@@ -5085,7 +5085,7 @@ static __init int tracer_init_debugfs(void)
 
 #ifdef CONFIG_TRACER_SNAPSHOT
         trace_create_file("snapshot", 0644, d_tracer,
-                          (void *) TRACE_PIPE_ALL_CPU, &snapshot_fops);
+                          (void *) RING_BUFFER_ALL_CPUS, &snapshot_fops);
 #endif
 
         create_trace_options_dir();
@@ -5162,7 +5162,7 @@ void trace_init_global_iter(struct trace_iterator *iter)
 {
         iter->tr = &global_trace;
         iter->trace = current_trace;
-        iter->cpu_file = TRACE_PIPE_ALL_CPU;
+        iter->cpu_file = RING_BUFFER_ALL_CPUS;
 }
 
 static void
@@ -5210,7 +5210,7 @@ __ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
 
         switch (oops_dump_mode) {
         case DUMP_ALL:
-                iter.cpu_file = TRACE_PIPE_ALL_CPU;
+                iter.cpu_file = RING_BUFFER_ALL_CPUS;
                 break;
         case DUMP_ORIG:
                 iter.cpu_file = raw_smp_processor_id();
@@ -5219,7 +5219,7 @@ __ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
                 goto out_enable;
         default:
                 printk(KERN_TRACE "Bad dumping mode, switching to all CPUs dump\n");
-                iter.cpu_file = TRACE_PIPE_ALL_CPU;
+                iter.cpu_file = RING_BUFFER_ALL_CPUS;
         }
 
         printk(KERN_TRACE "Dumping ftrace buffer:\n");
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 037f7eb03d69..da09a037abcd 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -453,8 +453,6 @@ static __always_inline void trace_clear_recursion(int bit)
         current->trace_recursion = val;
 }
 
-#define TRACE_PIPE_ALL_CPU      -1
-
 static inline struct ring_buffer_iter *
 trace_buffer_iter(struct trace_iterator *iter, int cpu)
 {
diff --git a/kernel/trace/trace_kdb.c b/kernel/trace/trace_kdb.c
index 3c5c5dfea0b3..cc1dbdc5ee5d 100644
--- a/kernel/trace/trace_kdb.c
+++ b/kernel/trace/trace_kdb.c
@@ -43,7 +43,7 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
         iter.iter_flags |= TRACE_FILE_LAT_FMT;
         iter.pos = -1;
 
-        if (cpu_file == TRACE_PIPE_ALL_CPU) {
+        if (cpu_file == RING_BUFFER_ALL_CPUS) {
                 for_each_tracing_cpu(cpu) {
                         iter.buffer_iter[cpu] =
                         ring_buffer_read_prepare(iter.tr->buffer, cpu);
@@ -115,7 +115,7 @@ static int kdb_ftdump(int argc, const char **argv)
                     !cpu_online(cpu_file))
                         return KDB_BADINT;
         } else {
-                cpu_file = TRACE_PIPE_ALL_CPU;
+                cpu_file = RING_BUFFER_ALL_CPUS;
         }
 
         kdb_trap_printk++;