add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/x86/um/ldt.c
..
..
@@ -23,9 +23,11 @@
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 {
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 	long res;
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 	void *stub_addr;
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+
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+	BUILD_BUG_ON(sizeof(*desc) % sizeof(long));
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+
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 	res = syscall_stub_data(mm_idp, (unsigned long *)desc,
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-				(sizeof(*desc) + sizeof(long) - 1) &
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-				    ~(sizeof(long) - 1),
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+				sizeof(*desc) / sizeof(long),
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 				addr, &stub_addr);
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 	if (!res) {
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 		unsigned long args[] = { func,