diff options
Diffstat (limited to 'kernel/dma/swiotlb.c')
| -rw-r--r-- | kernel/dma/swiotlb.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index cc50f1fb127f..c5a9190b218f 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -912,17 +912,23 @@ bool is_swiotlb_active(struct device *dev) } EXPORT_SYMBOL_GPL(is_swiotlb_active); +static int io_tlb_used_get(void *data, u64 *val) +{ + *val = mem_used(&io_tlb_default_mem); + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(fops_io_tlb_used, io_tlb_used_get, NULL, "%llu\n"); + static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem, const char *dirname) { - unsigned long used = mem_used(mem); - mem->debugfs = debugfs_create_dir(dirname, io_tlb_default_mem.debugfs); if (!mem->nslabs) return; debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs); - debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &used); + debugfs_create_file("io_tlb_used", 0400, mem->debugfs, NULL, + &fops_io_tlb_used); } static int __init __maybe_unused swiotlb_create_default_debugfs(void) |