The support for bitmaps on files is a very bad idea abusing various kernel
APIs, and fundamentally requires the file to not be on the actual array
without a way to check that this is actually the case. Add a deprecation
warning to see if we might be able to eventually drop it.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/md/Kconfig | 2 +-
drivers/md/md.c | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 9712ab9bcba52e..444517d1a2336a 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -51,7 +51,7 @@ config MD_AUTODETECT
If unsure, say Y.
config MD_BITMAP_FILE
- bool "MD bitmap file support"
+ bool "MD bitmap file support (deprecated)"
default y
help
If you say Y here, support for write intent bitmaps in files on an
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c9fcefaf9c073b..d04a91295edf9d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7026,6 +7026,8 @@ static int set_bitmap_file(struct mddev *mddev, int fd)
mdname(mddev));
return -EINVAL;
}
+ pr_warn("%s: using deprecated bitmap file support\n",
+ mdname(mddev));
f = fget(fd);
--
2.39.2
