This is a note to let you know that I've just added the patch titled
swiotlb: fix debugfs reporting of reserved memory pools
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
swiotlb-fix-debugfs-reporting-of-reserved-memory-poo.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e575c76f2b3ef8bc0a57c82c5ba7173efd8b86c3
Author: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Date: Thu Apr 13 08:37:30 2023 -0700
swiotlb: fix debugfs reporting of reserved memory pools
[ Upstream commit 5499d01c029069044a3b3e50501c77b474c96178 ]
For io_tlb_nslabs, the debugfs code reports the correct value for a
specific reserved memory pool. But for io_tlb_used, the value reported
is always for the default pool, not the specific reserved pool. Fix this.
Fixes: 5c850d31880e ("swiotlb: fix passing local variable to debugfs_create_ulong()")
Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 2bb9e3b023802..09d2f4877d0f4 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -930,7 +930,9 @@ EXPORT_SYMBOL_GPL(is_swiotlb_active);
static int io_tlb_used_get(void *data, u64 *val)
{
- *val = mem_used(&io_tlb_default_mem);
+ struct io_tlb_mem *mem = data;
+
+ *val = mem_used(mem);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_io_tlb_used, io_tlb_used_get, NULL, "%llu\n");
@@ -943,7 +945,7 @@ static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem,
return;
debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
- debugfs_create_file("io_tlb_used", 0400, mem->debugfs, NULL,
+ debugfs_create_file("io_tlb_used", 0400, mem->debugfs, mem,
&fops_io_tlb_used);
}
