mm: remove the BOUNCE config option

Commit eeadd68e2a5f ("block: remove bounce buffering support") remove
block/bounce.c but left the BOUNCE config option.  Now this option has no
users, so remove it.

Link: https://lkml.kernel.org/r/20251013095620.1111061-1-chenhuacai@loongson.cn
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: John Garry <john.g.garry@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/Kconfig b/mm/Kconfig
index 0e26f4fc8717b91244d88b1ef844aab0510013d3..e47321051d76537507dc193f645fcfdd01bb4e93 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -695,15 +695,6 @@ config PCP_BATCH_SCALE_MAX
 config PHYS_ADDR_T_64BIT
        def_bool 64BIT
 
-config BOUNCE
-       bool "Enable bounce buffers"
-       default y
-       depends on BLOCK && MMU && HIGHMEM
-       help
-         Enable bounce buffers for devices that cannot access the full range of
-         memory available to the CPU. Enabled by default when HIGHMEM is
-         selected, but you may say n to override this.
-
 config MMU_NOTIFIER
        bool
        select INTERVAL_TREE