[PATCH] LoongArch: Clean up plat_swiotlb_setup() related code

[Tiezhu Yang]

After commit c78c43fe7d42 ("LoongArch: Use acpi_arch_dma_setup()
and remove ARCH_HAS_PHYS_TO_DMA"), plat_swiotlb_setup() has been
deleted, clean up the related code.

Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
---
 arch/loongarch/include/asm/bootinfo.h | 1 -
 arch/loongarch/kernel/setup.c         | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/loongarch/include/asm/bootinfo.h b/arch/loongarch/include/asm/bootinfo.h
index 0051b52..c607968 100644
--- a/arch/loongarch/include/asm/bootinfo.h
+++ b/arch/loongarch/include/asm/bootinfo.h
@@ -13,7 +13,6 @@ const char *get_system_type(void);
 extern void init_environ(void);
 extern void memblock_init(void);
 extern void platform_init(void);
-extern void plat_swiotlb_setup(void);
 extern int __init init_numa_memory(void);
 
 struct loongson_board_info {
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index 27f71f9..4444b13 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -389,8 +389,8 @@ static void __init arch_mem_init(char **cmdline_p)
 	/*
 	 * In order to reduce the possibility of kernel panic when failed to
 	 * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate
-	 * low memory as small as possible before plat_swiotlb_setup(), so
-	 * make sparse_init() using top-down allocation.
+	 * low memory as small as possible before swiotlb_init(), so make
+	 * sparse_init() using top-down allocation.
 	 */
 	memblock_set_bottom_up(false);
 	sparse_init();
-- 
2.1.0