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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-11-12 21:11:59 -0500
committerSteven Rostedt <rostedt@goodmis.org>2014-11-19 15:25:38 -0500
commite400a40cffa77e45c60c5431ec8757579247cae2 (patch)
tree3f47e176dc3bdd8c3cfe469a1095dce8c5139f4c
parentdbcf3e06cae0424d85c8dd1a1b93e25e84b06a8d (diff)
tracing: Fix trace_seq_bitmask() to start at current position
In trace_seq_bitmask() it calls bitmap_scnprintf() not from the current position of the trace_seq buffer (s->buffer + s->len), but instead from the beginning of the buffer (s->buffer). Luckily, the only user of this "ipi_raise tracepoint" uses it as the first parameter, and as such, the start of the temp buffer in include/trace/ftrace.h (see __get_bitmask()). Reported-by: Petr Mladek <pmladek@suse.cz> Reviewed-by: Petr Mladek <pmladek@suse.cz> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-rw-r--r--kernel/trace/trace_seq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_seq.c b/kernel/trace/trace_seq.c
index 1f24ed99dca2..b100994a17fe 100644
--- a/kernel/trace/trace_seq.c
+++ b/kernel/trace/trace_seq.c
@@ -122,7 +122,7 @@ int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
if (s->full || !len)
return 0;
- ret = bitmap_scnprintf(s->buffer, len, maskp, nmaskbits);
+ ret = bitmap_scnprintf(s->buffer + s->len, len, maskp, nmaskbits);
s->len += ret;
return 1;