block: fix 'kmem_cache of name 'bio-108' already exists'

jira LE-3460
Rebuild_History Non-Buildable kernel-6.12.0-55.17.1.el10_0
commit-author Ming Lei <ming.lei@redhat.com>
commit b654f7a

Device mapper bioset often has big bio_slab size, which can be more than
1000, then 8byte can't hold the slab name any more, cause the kmem_cache
allocation warning of 'kmem_cache of name 'bio-108' already exists'.

Fix the warning by extending bio_slab->name to 12 bytes, but fix output
of /proc/slabinfo

	Reported-by: Guangwu Zhang <guazhang@redhat.com>
	Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20250228132656.2838008-1-ming.lei@redhat.com
	Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit b654f7a)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

block/bio.c

@@ -77,7 +77,7 @@ struct bio_slab {
 	struct kmem_cache *slab;
 	unsigned int slab_ref;
 	unsigned int slab_size;
-	char name[8];
+	char name[12];
 };
 static DEFINE_MUTEX(bio_slab_lock);
 static DEFINE_XARRAY(bio_slabs);