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swiotlb: remove unused SWIOTLB_FORCE flag

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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.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260717180442.110954-24-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Aneesh Kumar K.V (Arm)
2026-07-31 08:44:52 +02:00
committed by Marek Szyprowski
parent ad8d2326d2
commit 04a19b35dc
2 changed files with 2 additions and 4 deletions
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include/linux/swiotlb.h
+1 -2
View File
@@ -15,8 +15,7 @@ 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 */
#define SWIOTLB_ANY (1 << 1) /* allow any memory for the buffer */
/*
* Maximum allowable number of contiguous slabs to map,
kernel/dma/swiotlb.c
+1 -2
View File
@@ -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)