disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/cfi.h
..
..
@@ -1,38 +1,41 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+/*
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+ * Clang Control Flow Integrity (CFI) support.
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+ *
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+ * Copyright (C) 2019 Google LLC
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+ */
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 #ifndef _LINUX_CFI_H
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 #define _LINUX_CFI_H
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-#include <linux/stringify.h>
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-
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 #ifdef CONFIG_CFI_CLANG
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-#ifdef CONFIG_MODULES
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-
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-typedef void (*cfi_check_fn)(uint64_t, void *, void *);
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+typedef void (*cfi_check_fn)(uint64_t id, void *ptr, void *diag);
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 /* Compiler-generated function in each module, and the kernel */
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-#define CFI_CHECK_FN		__cfi_check
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-#define CFI_CHECK_FN_NAME	__stringify(CFI_CHECK_FN)
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+extern void __cfi_check(uint64_t id, void *ptr, void *diag);
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-extern void CFI_CHECK_FN(uint64_t, void *, void *);
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+/*
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+ * Force the compiler to generate a CFI jump table entry for a function
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+ * and store the jump table address to __cfi_jt_<function>.
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+ */
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+#define __CFI_ADDRESSABLE(fn) \
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+	const void* __cfi_jt_ ## fn __visible = (void *)&fn;
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 #ifdef CONFIG_CFI_CLANG_SHADOW
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-extern void cfi_module_add(struct module *mod, unsigned long min_addr,
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-	unsigned long max_addr);
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-extern void cfi_module_remove(struct module *mod, unsigned long min_addr,
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-	unsigned long max_addr);
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+extern void cfi_module_add(struct module *mod, unsigned long base_addr);
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+extern void cfi_module_remove(struct module *mod, unsigned long base_addr);
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+
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 #else
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-static inline void cfi_module_add(struct module *mod, unsigned long min_addr,
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-	unsigned long max_addr)
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-{
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-}
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-static inline void cfi_module_remove(struct module *mod, unsigned long min_addr,
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-	unsigned long max_addr)
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-{
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-}
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+static inline void cfi_module_add(struct module *mod, unsigned long base_addr) {}
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+static inline void cfi_module_remove(struct module *mod, unsigned long base_addr) {}
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+
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 #endif /* CONFIG_CFI_CLANG_SHADOW */
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-#endif /* CONFIG_MODULES */
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+#else /* !CONFIG_CFI_CLANG */
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+
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+#define __CFI_ADDRESSABLE(fn)
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+
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 #endif /* CONFIG_CFI_CLANG */
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 #endif /* _LINUX_CFI_H */