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swiotlb: fix passing local variable to debugfs_create_ulong()
Debugfs node will be run-timely checked and so local variable should be not passed to debugfs_create_ulong(). Fix it via debugfs_create_file() to create io_tlb_used node and calculate used io tlb number with fops_io_tlb_used attribute. Fixes: 20347fca71a3 ("swiotlb: split up the global swiotlb lock") Signed-off-by: Tianyu Lan <tiala@microsoft.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -912,17 +912,23 @@ bool is_swiotlb_active(struct device *dev)
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}
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EXPORT_SYMBOL_GPL(is_swiotlb_active);
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static int io_tlb_used_get(void *data, u64 *val)
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{
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*val = mem_used(&io_tlb_default_mem);
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(fops_io_tlb_used, io_tlb_used_get, NULL, "%llu\n");
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static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem,
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const char *dirname)
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{
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unsigned long used = mem_used(mem);
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mem->debugfs = debugfs_create_dir(dirname, io_tlb_default_mem.debugfs);
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if (!mem->nslabs)
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return;
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debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
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debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &used);
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debugfs_create_file("io_tlb_used", 0400, mem->debugfs, NULL,
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&fops_io_tlb_used);
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}
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static int __init __maybe_unused swiotlb_create_default_debugfs(void)
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