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 <[email protected]>
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 <[email protected]>
	Signed-off-by: Ming Lei <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
	Signed-off-by: Jens Axboe <[email protected]>
(cherry picked from commit b654f7a)
	Signed-off-by: Jonathan Maple <[email protected]>

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);