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tracing: Fix trace_seq_bitmask() to start at current position

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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>
This commit is contained in:
Steven Rostedt (Red Hat) 2014-11-12 21:11:59 -05:00 committed by Steven Rostedt
parent dbcf3e06ca
commit e400a40cff
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_seq.c
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@ -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;