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authorClaire Chang <tientzu@chromium.org>2021-06-19 11:40:33 +0800
committerKonrad Rzeszutek Wilk <konrad@kernel.org>2021-07-13 20:04:35 -0400
commit6e675a1c455ea7579c7eaf1a38fe64267039d6fe (patch)
tree5b389d2ff6936bd2b4587ff600e67280207675c7 /kernel/dma
parent0a65579cdd28bed3e84e1b4929c3080da4f06d79 (diff)
downloadlinux-6e675a1c455ea7579c7eaf1a38fe64267039d6fe.tar.bz2
swiotlb: Refactor swiotlb_create_debugfs
Split the debugfs creation to make the code reusable for supporting different bounce buffer pools. Signed-off-by: Claire Chang <tientzu@chromium.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: Stefano Stabellini <sstabellini@kernel.org> Tested-by: Will Deacon <will@kernel.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/swiotlb.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 414db5fc8de9..ae6a151d0a41 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -669,19 +669,26 @@ bool is_swiotlb_active(void)
EXPORT_SYMBOL_GPL(is_swiotlb_active);
#ifdef CONFIG_DEBUG_FS
+static struct dentry *debugfs_dir;
-static int __init swiotlb_create_debugfs(void)
+static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem)
{
- struct io_tlb_mem *mem = io_tlb_default_mem;
-
- if (!mem)
- return 0;
- mem->debugfs = debugfs_create_dir("swiotlb", NULL);
debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &mem->used);
+}
+
+static int __init swiotlb_create_default_debugfs(void)
+{
+ struct io_tlb_mem *mem = io_tlb_default_mem;
+
+ debugfs_dir = debugfs_create_dir("swiotlb", NULL);
+ if (mem) {
+ mem->debugfs = debugfs_dir;
+ swiotlb_create_debugfs_files(mem);
+ }
return 0;
}
-late_initcall(swiotlb_create_debugfs);
+late_initcall(swiotlb_create_default_debugfs);
#endif