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tracing: Add seq_buf_get_buf() and seq_buf_commit() helper functions

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Add two helper functions; seq_buf_get_buf() and seq_buf_commit() that
are used by seq_buf_path(). This makes the code similar to the
seq_file: seq_path() function, and will help to be able to consolidate
the functions between seq_file and trace_seq.

Link: http://lkml.kernel.org/r/20141104160222.644881406@goodmis.org
Link: http://lkml.kernel.org/r/20141114011412.977571447@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 17:30:50 -04:00
committed by Steven Rostedt
parent 8cd709ae76
commit 01cb06a4c2
2 changed files with 44 additions and 4 deletions
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7
kernel/trace/seq_buf.c
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@@ -293,8 +293,8 @@ int seq_buf_putmem_hex(struct seq_buf *s, const void *mem,
*/
int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc)
{
char *buf = s->buffer + s->len;
size_t size = seq_buf_buffer_left(s);
char *buf;
size_t size = seq_buf_get_buf(s, &buf);
int res = -1;
WARN_ON(s->size == 0);
@@ -307,8 +307,7 @@ int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc)
res = end - buf;
}
}
if (res > 0)
s->len += res;
seq_buf_commit(s, res);
return res;
}