[PATCH 18/23] block: add a error_count field to struct request

Christoph Hellwig
2017-04-20T14:03:11Z

This is for the legacy floppy and ataflop drivers that currently abuse
->errors for this purpose. It's stashed away in a union to not grow
the struct size, the other fields are either used by modern drivers
for different purposes or the I/O scheduler before queing the I/O
to drivers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/blkdev.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e2064ed3c703..a3dcee624de3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -175,6 +175,7 @@ struct request {
struct rb_node rb_node; /* sort/lookup */
struct bio_vec special_vec;
void *completion_data;
+ int error_count; /* for legacy drivers, don't use */
};

/*
--
2.11.0