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| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-06-20 20:33:15 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-24 01:59:27 +0200 |
| commit | b5665cf936bf3955fec18c09a6aa53c8a57ea8b7 (patch) | |
| tree | 87a24a3487261ec6aeed6b8d95ff62f6ed69d260 /mm/backing-dev.c | |
| parent | mm/swapfile: delete outdated pte_offset_map() comment (diff) | |
| download | linux-b5665cf936bf3955fec18c09a6aa53c8a57ea8b7.tar.xz linux-b5665cf936bf3955fec18c09a6aa53c8a57ea8b7.zip | |
mm: backing-dev: make bdi_class a static const structure
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@linuxfoundation.org
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/backing-dev.c')
| -rw-r--r-- | mm/backing-dev.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 7da9727fcdf3..3ffc3cfa7a14 100644 --- a/mm/backing-dev.c +++ b/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_info *bdi, const char *fmt, va_list args) 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); |