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seq_file: Rename seq_overflow() to seq_has_overflowed() and make public

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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 <viro@zeniv.linux.org.uk>
Signed-off-by: Joe Perches <joe@perches.com>
[ Reworked the original patch from Joe ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Joe Perches
2014-09-29 16:08:21 -07:00
committed by Steven Rostedt
parent f114040e3e
commit 1f33c41c03
3 changed files with 30 additions and 22 deletions
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15
include/linux/seq_file.h
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@@ -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