linux/kernel/trace
Xiao Guangrong e1af3aec3e tracing: Fix trace_print_seq()
We will lose something if trace_seq->buffer[0] is 0, because the copy length
is calculated by strlen() in seq_puts(), so using seq_write() instead of
seq_puts().

There have a example:
after reboot:

 # echo kmemtrace > current_tracer
 # echo 0 > options/kmem_minimalistic
 # cat trace
 # tracer: kmemtrace
 #
 #

Nothing is exported, because the first byte of trace_seq->buffer[ ]
is KMEMTRACE_USER_ALLOC.

( the value of KMEMTRACE_USER_ALLOC is zero, seeing
  kmemtrace_print_alloc_user() in kernel/trace/kmemtrace.c)

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A4B2351.5010300@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-07-02 08:51:13 +02:00
..
Kconfig tracing/fastboot: Document the need of initcall_debug 2009-06-29 10:22:10 +02:00
Makefile tracing/events: convert block trace points to TRACE_EVENT() 2009-06-09 12:34:23 -04:00
blktrace.c Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block 2009-06-11 11:10:35 -07:00
ftrace.c tracing: Fix stack tracer sysctl handling 2009-06-26 20:48:39 +02:00
kmemtrace.c cpumask: use new operators in kernel/trace 2009-06-15 11:36:42 -04:00
ring_buffer.c ring-buffer: Make it generally available 2009-06-25 10:31:30 +02:00
ring_buffer_benchmark.c ring-buffer: have benchmark test print to trace buffer 2009-06-17 17:01:09 -04:00
trace.c tracing: Fix trace_buf_size boot option 2009-06-24 11:41:12 +02:00
trace.h ring-buffer: Make it generally available 2009-06-25 10:31:30 +02:00
trace_boot.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_branch.c Merge branch 'linus' into tracing/core 2009-05-07 11:17:34 +02:00
trace_clock.c tracing: fix four sparse warnings 2009-03-22 18:16:54 +01:00
trace_event_profile.c tracing/events: fix concurrent access to ftrace_events list 2009-05-06 10:38:19 +02:00
trace_event_types.h trace_export: Repair missed fields 2009-06-26 20:48:40 +02:00
trace_events.c tracing/events: Don't increment @pos in s_start() 2009-06-24 11:02:49 +02:00
trace_events_filter.c tracing/filters: fix race between filter setting and module unload 2009-06-16 16:25:37 -04:00
trace_export.c tracing/filters: distinguish between signed and unsigned fields 2009-04-29 14:06:03 +02:00
trace_functions.c ftrace: Remove duplicate newline 2009-06-25 10:28:36 +02:00
trace_functions_graph.c function-graph: add stack frame test 2009-06-18 18:40:18 -04:00
trace_hw_branches.c Merge branch 'tracing/hw-branch-tracing' into tracing/core 2009-05-07 13:36:22 +02:00
trace_irqsoff.c tracing: have latency tracers set the latency format 2009-03-04 22:15:30 -05:00
trace_mmiotrace.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing: Fix trace_print_seq() 2009-07-02 08:51:13 +02:00
trace_output.h tracing: add protection around module events unload 2009-06-09 17:29:07 -04:00
trace_power.c Merge branch 'linus' into tracing/core 2009-05-07 11:17:34 +02:00
trace_printk.c tracing_bprintk: Don't increment @pos in t_start() 2009-06-24 11:02:50 +02:00
trace_sched_switch.c tracing/events: move trace point headers into include/trace/events 2009-04-14 22:05:43 -04:00
trace_sched_wakeup.c tracing/wakeup: move access to wakeup_cpu into spinlock 2009-04-23 23:01:36 -04:00
trace_selftest.c x86, hw-branch-tracer: allocate selftest iterator on heap 2009-04-07 13:36:21 +02:00
trace_selftest_dynamic.c
trace_stack.c tracing: Fix stack tracer sysctl handling 2009-06-26 20:48:39 +02:00
trace_stat.c trace_stat: Don't increment @pos in seq start() 2009-06-24 11:02:51 +02:00
trace_stat.h tracing: add handler to trace_stat 2009-03-24 23:22:58 -04:00
trace_syscalls.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
trace_sysprof.c Merge branch 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-15 10:06:19 -07:00
trace_workqueue.c trace_workqueue: remove blank line between each cpu 2009-06-02 01:14:26 +02:00