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tracing: Add a seq_buf_clear() helper and clear len and readpos in init 

Add a helper function seq_buf_clear() that resets the len and readpos
fields of a seq_buf. Currently it is only used in the seq_buf_init()
but will be used later when updating the seq_file code.

Link: http://lkml.kernel.org/r/20141104160222.352309995@goodmis.org

Tested-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Jiri Kosina <jkosina@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) 2014-10-29 14:17:52 -04:00 committed by Steven Rostedt
parent 9a7777935c
commit 0736c033a8
1 changed files with 7 additions and 2 deletions
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9
include/linux/seq_buf.h
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@ -22,13 +22,18 @@ struct seq_buf {
loff_t readpos;
};
static inline void seq_buf_clear(struct seq_buf *s)
{
s->len = 0;
s->readpos = 0;
}
static inline void
seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size)
{
s->buffer = buf;
s->size = size;
s->len = 0;
s->readpos = 0;
seq_buf_clear(s);
}
/*