The quilt patch titled
Subject: mm: backing-dev: make bdi_class a static const structure
has been removed from the -mm tree. Its filename was
mm-backing-dev-make-bdi_class-a-static-const-structure.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Ivan Orlov <ivan.orlov0322@xxxxxxxxx>
Subject: mm: backing-dev: make bdi_class a static const structure
Date: Tue, 20 Jun 2023 20:33:15 +0200
Now that the driver core allows for struct class to be in read-only
memory, move the bdi_class structure to be declared at build time placing
it into read-only memory, instead of having to be dynamically allocated at
load time.
Link: https://lkml.kernel.org/r/20230620183314.682822-2-gregkh@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Ivan Orlov <ivan.orlov0322@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Suggested-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/backing-dev.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
--- a/mm/backing-dev.c~mm-backing-dev-make-bdi_class-a-static-const-structure
+++ a/mm/backing-dev.c
@@ -20,7 +20,6 @@
struct backing_dev_info noop_backing_dev_info;
EXPORT_SYMBOL_GPL(noop_backing_dev_info);
-static struct class *bdi_class;
static const char *bdi_unknown_name = "(unknown)";
/*
@@ -345,13 +344,19 @@ static struct attribute *bdi_dev_attrs[]
};
ATTRIBUTE_GROUPS(bdi_dev);
+static const struct class bdi_class = {
+ .name = "bdi",
+ .dev_groups = bdi_dev_groups,
+};
+
static __init int bdi_class_init(void)
{
- bdi_class = class_create("bdi");
- if (IS_ERR(bdi_class))
- return PTR_ERR(bdi_class);
+ int ret;
+
+ ret = class_register(&bdi_class);
+ if (ret)
+ return ret;
- bdi_class->dev_groups = bdi_dev_groups;
bdi_debug_init();
return 0;
@@ -1001,7 +1006,7 @@ int bdi_register_va(struct backing_dev_i
return 0;
vsnprintf(bdi->dev_name, sizeof(bdi->dev_name), fmt, args);
- dev = device_create(bdi_class, NULL, MKDEV(0, 0), bdi, bdi->dev_name);
+ dev = device_create(&bdi_class, NULL, MKDEV(0, 0), bdi, bdi->dev_name);
if (IS_ERR(dev))
return PTR_ERR(dev);
_
Patches currently in -mm which might be from ivan.orlov0322@xxxxxxxxx are
