change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/drivers/usb/gadget/function/f_mass_storage.c
..
..
@@ -951,7 +951,7 @@
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 {
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 	struct file	*filp = curlun->filp;
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 	struct inode	*inode = file_inode(filp);
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-	unsigned long	rc;
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+	unsigned long __maybe_unused	rc;
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 	rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
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 	VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);