From 1f33c41c03daece85a84b8dcea5733f3efe3e2b0 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 29 Sep 2014 16:08:21 -0700 Subject: seq_file: Rename seq_overflow() to seq_has_overflowed() and make public The return values of seq_printf/puts/putc are frequently misused. Start down a path to remove all the return value uses of these functions. Move the seq_overflow() to a global inlined function called seq_has_overflowed() that can be used by the users of seq_file() calls. Update the documentation to not show return types for seq_printf et al. Add a description of seq_has_overflowed(). Link: http://lkml.kernel.org/p/848ac7e3d1c31cddf638a8526fa3c59fa6fdeb8a.1412031505.git.joe@perches.com Cc: Al Viro Signed-off-by: Joe Perches [ Reworked the original patch from Joe ] Signed-off-by: Steven Rostedt --- include/linux/seq_file.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux/seq_file.h') diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 52e0097f61f0..cf6a9daaaf6d 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -42,6 +42,21 @@ struct seq_operations { #define SEQ_SKIP 1 +/** + * seq_has_overflowed - check if the buffer has overflowed + * @m: the seq_file handle + * + * seq_files have a buffer which may overflow. When this happens a larger + * buffer is reallocated and all the data will be printed again. + * The overflow state is true when m->count == m->size. + * + * Returns true if the buffer received more than it can hold. + */ +static inline bool seq_has_overflowed(struct seq_file *m) +{ + return m->count == m->size; +} + /** * seq_get_buf - get buffer to write arbitrary data to * @m: the seq_file handle -- cgit v1.2.3-59-g8ed1b