Subject: [PATCH v6 20/20] swiotlb: remove unused SWIOTLB_FORCE flag

From: "Aneesh Kumar K.V (Arm)" <[email-masked]>
Date: Thu, 4 Jun 2026 14:09:59 +0530

SWIOTLB_FORCE has no remaining in-tree users. Forced bouncing is now
controlled through the swiotlb=force command line option via
swiotlb_force_bounce.

Remove the unused flag and simplify the force_bounce initialization.

Signed-off-by: Aneesh Kumar K.V (Arm) <[email-masked]>
---
 include/linux/swiotlb.h | 1 -
 kernel/dma/swiotlb.c    | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 526f82e9da45..af88ca7182f4 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -15,7 +15,6 @@ struct page;
 struct scatterlist;
 
 #define SWIOTLB_VERBOSE	(1 << 0) /* verbose initialization */
-#define SWIOTLB_FORCE	(1 << 1) /* force bounce buffering */
 #define SWIOTLB_ANY	(1 << 2) /* allow any memory for the buffer */
 
 /*
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index e4bd8c9eaeda..81cc4928e949 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -400,8 +400,7 @@ void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
 	if (swiotlb_force_disable)
 		return;
 
-	io_tlb_default_mem.force_bounce =
-		swiotlb_force_bounce || (flags & SWIOTLB_FORCE);
+	io_tlb_default_mem.force_bounce = swiotlb_force_bounce;
 
 #ifdef CONFIG_SWIOTLB_DYNAMIC
 	if (!remap)
-- 
2.43.0