modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/drivers/block/xen-blkback/Makefile
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 obj-$(CONFIG_XEN_BLKDEV_BACKEND) := xen-blkback.o
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 xen-blkback-y	:= blkback.o xenbus.o