Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y
branch tracer: Fix for enabling branch profiling makes sparse unusable
ftrace: Correct a text align for event format output
Update /debug/tracing/README
tracing/ftrace: alloc the started cpumask for the trace file
tracing, x86: remove duplicated #include
ftrace: Add check of sched_stopped for probe_sched_wakeup
function-graph: add proper initialization for init task
tracing/ftrace: fix missing include string.h
tracing: fix incorrect return type of ns2usecs()
tracing: remove CALLER_ADDR2 from wakeup tracer
blktrace: fix pdu_len when tracing packet command requests
blktrace: small cleanup in blk_msg_write()
blktrace: NUL-terminate user space messages
tracing: move scripts/trace/power.pl to scripts/tracing/power.pl
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 61df775..70a10ca 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -20,7 +20,6 @@
#include <asm/cacheflush.h>
#include <asm/ftrace.h>
-#include <linux/ftrace.h>
#include <asm/nops.h>
#include <asm/nmi.h>
diff --git a/block/blk-core.c b/block/blk-core.c
index 43fdedc..07ab754 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -131,6 +131,7 @@
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
rq->cmd = rq->__cmd;
+ rq->cmd_len = BLK_MAX_CDB;
rq->tag = -1;
rq->ref_count = 1;
}
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index cebfdcd..37bcb50 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -76,7 +76,8 @@
* Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code
* to disable branch tracing on a per file basis.
*/
-#if defined(CONFIG_TRACE_BRANCH_PROFILING) && !defined(DISABLE_BRANCH_PROFILING)
+#if defined(CONFIG_TRACE_BRANCH_PROFILING) \
+ && !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)
void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
#define likely_notrace(x) __builtin_expect(!!(x), 1)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 015a3d2..da5405d 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -356,6 +356,9 @@
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+/* for init task */
+#define INIT_FTRACE_GRAPH .ret_stack = NULL
+
/*
* Stack of return addresses for functions
* of a thread.
@@ -430,10 +433,11 @@
{
atomic_dec(¤t->tracing_graph_pause);
}
-#else
+#else /* !CONFIG_FUNCTION_GRAPH_TRACER */
#define __notrace_funcgraph
#define __irq_entry
+#define INIT_FTRACE_GRAPH
static inline void ftrace_graph_init_task(struct task_struct *t) { }
static inline void ftrace_graph_exit_task(struct task_struct *t) { }
@@ -445,7 +449,7 @@
static inline void pause_graph_tracing(void) { }
static inline void unpause_graph_tracing(void) { }
-#endif
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#ifdef CONFIG_TRACING
#include <linux/sched.h>
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index af1de95..dcfb933 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -5,6 +5,7 @@
#include <linux/irqflags.h>
#include <linux/utsname.h>
#include <linux/lockdep.h>
+#include <linux/ftrace.h>
#include <linux/ipc.h>
#include <linux/pid_namespace.h>
#include <linux/user_namespace.h>
@@ -185,6 +186,7 @@
INIT_IDS \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
+ INIT_FTRACE_GRAPH \
}
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 947c5b3..b32ff44 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -327,10 +327,10 @@
char *msg;
struct blk_trace *bt;
- if (count > BLK_TN_MAX_MSG)
+ if (count >= BLK_TN_MAX_MSG)
return -EINVAL;
- msg = kmalloc(count, GFP_KERNEL);
+ msg = kmalloc(count + 1, GFP_KERNEL);
if (msg == NULL)
return -ENOMEM;
@@ -339,6 +339,7 @@
return -EFAULT;
}
+ msg[count] = '\0';
bt = filp->private_data;
__trace_note_message(bt, "%s", msg);
kfree(msg);
@@ -642,7 +643,7 @@
if (blk_pc_request(rq)) {
what |= BLK_TC_ACT(BLK_TC_PC);
__blk_add_trace(bt, 0, rq->data_len, rw, what, rq->errors,
- sizeof(rq->cmd), rq->cmd);
+ rq->cmd_len, rq->cmd);
} else {
what |= BLK_TC_ACT(BLK_TC_FS);
__blk_add_trace(bt, rq->hard_sector, rq->hard_nr_sectors << 9,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a0174a4..9d28476 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -30,6 +30,7 @@
#include <linux/percpu.h>
#include <linux/splice.h>
#include <linux/kdebug.h>
+#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/poll.h>
@@ -147,8 +148,7 @@
}
__setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops);
-long
-ns2usecs(cycle_t nsec)
+unsigned long long ns2usecs(cycle_t nsec)
{
nsec += 500;
do_div(nsec, 1000);
@@ -1632,7 +1632,11 @@
return;
cpumask_set_cpu(iter->cpu, iter->started);
- trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);
+
+ /* Don't print started cpu buffer for the first entry of the trace */
+ if (iter->idx > 1)
+ trace_seq_printf(s, "##### CPU %u buffer started ####\n",
+ iter->cpu);
}
static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
@@ -1867,6 +1871,11 @@
if (current_trace)
*iter->trace = *current_trace;
+ if (!alloc_cpumask_var(&iter->started, GFP_KERNEL))
+ goto fail;
+
+ cpumask_clear(iter->started);
+
if (current_trace && current_trace->print_max)
iter->tr = &max_tr;
else
@@ -1917,6 +1926,7 @@
if (iter->buffer_iter[cpu])
ring_buffer_read_finish(iter->buffer_iter[cpu]);
}
+ free_cpumask_var(iter->started);
fail:
mutex_unlock(&trace_types_lock);
kfree(iter->trace);
@@ -1960,6 +1970,7 @@
seq_release(inode, file);
mutex_destroy(&iter->mutex);
+ free_cpumask_var(iter->started);
kfree(iter->trace);
kfree(iter);
return 0;
@@ -2358,9 +2369,9 @@
"# mkdir /debug\n"
"# mount -t debugfs nodev /debug\n\n"
"# cat /debug/tracing/available_tracers\n"
- "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n"
+ "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n"
"# cat /debug/tracing/current_tracer\n"
- "none\n"
+ "nop\n"
"# echo sched_switch > /debug/tracing/current_tracer\n"
"# cat /debug/tracing/current_tracer\n"
"sched_switch\n"
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cbc168f..e685ac2 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -602,7 +602,7 @@
#endif /* CONFIG_FTRACE_STARTUP_TEST */
extern void *head_page(struct trace_array_cpu *data);
-extern long ns2usecs(cycle_t nsec);
+extern unsigned long long ns2usecs(cycle_t nsec);
extern int
trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
extern int
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 4d9952d..07a22c3 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -40,7 +40,7 @@
#undef TRACE_FIELD_ZERO_CHAR
#define TRACE_FIELD_ZERO_CHAR(item) \
- ret = trace_seq_printf(s, "\tfield: char " #item ";\t" \
+ ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \
"offset:%u;\tsize:0;\n", \
(unsigned int)offsetof(typeof(field), item)); \
if (!ret) \
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index d72b9a6..64b54a5 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -423,7 +423,7 @@
trace_find_cmdline(entry->pid, comm);
- ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]"
+ ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]"
" %ld.%03ldms (+%ld.%03ldms): ", comm,
entry->pid, iter->cpu, entry->flags,
entry->preempt_count, iter->idx,
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index de35f20..9117cea 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -62,6 +62,9 @@
pc = preempt_count();
tracing_record_cmdline(current);
+ if (sched_stopped)
+ return;
+
local_irq_save(flags);
cpu = raw_smp_processor_id();
data = ctx_trace->data[cpu];
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 3c5ad6b..5bc00e8f 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -154,7 +154,7 @@
if (unlikely(!tracer_enabled || next != wakeup_task))
goto out_unlock;
- trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
+ trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
/*
@@ -257,6 +257,12 @@
data = wakeup_trace->data[wakeup_cpu];
data->preempt_timestamp = ftrace_now(cpu);
tracing_sched_wakeup_trace(wakeup_trace, p, current, flags, pc);
+
+ /*
+ * We must be careful in using CALLER_ADDR2. But since wake_up
+ * is not called by an assembly function (where as schedule is)
+ * it should be safe to use it here.
+ */
trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
out_locked:
diff --git a/scripts/trace/power.pl b/scripts/tracing/power.pl
similarity index 100%
rename from scripts/trace/power.pl
rename to scripts/tracing/power.pl