add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/fs/jffs2/file.c
..
..
@@ -57,6 +57,7 @@
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 	.mmap =		generic_file_readonly_mmap,
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 	.fsync =	jffs2_fsync,
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 	.splice_read =	generic_file_splice_read,
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+	.splice_write = iter_file_splice_write,
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 };
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 /* jffs2_file_inode_operations */