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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/init.h
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@@ -47,11 +47,11 @@
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 /* These are for everybody (although not all archs will actually
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    discard it in modules) */
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-#define __init		__section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
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-#define __initdata	__section(.init.data)
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-#define __initconst	__section(.init.rodata)
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-#define __exitdata	__section(.exit.data)
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-#define __exit_call	__used __section(.exitcall.exit)
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+#define __init		__section(".init.text") __cold  __latent_entropy __noinitretpoline __nocfi
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+#define __initdata	__section(".init.data")
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+#define __initconst	__section(".init.rodata")
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+#define __exitdata	__section(".exit.data")
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+#define __exit_call	__used __section(".exitcall.exit")
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 /*
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  * modpost check for section mismatches during the kernel build.
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@@ -70,9 +70,9 @@
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  *
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  * The markers follow same syntax rules as __init / __initdata.
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  */
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-#define __ref            __section(.ref.text) noinline
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-#define __refdata        __section(.ref.data)
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-#define __refconst       __section(.ref.rodata)
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+#define __ref            __section(".ref.text") noinline
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+#define __refdata        __section(".ref.data")
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+#define __refconst       __section(".ref.rodata")
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 #ifdef MODULE
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 #define __exitused
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@@ -80,16 +80,16 @@
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 #define __exitused  __used
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 #endif
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-#define __exit          __section(.exit.text) __exitused __cold notrace
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+#define __exit          __section(".exit.text") __exitused __cold notrace
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 /* Used for MEMORY_HOTPLUG */
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-#define __meminit        __section(.meminit.text) __cold notrace \
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+#define __meminit        __section(".meminit.text") __cold notrace \
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 						  __latent_entropy
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-#define __meminitdata    __section(.meminit.data)
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-#define __meminitconst   __section(.meminit.rodata)
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-#define __memexit        __section(.memexit.text) __exitused __cold notrace
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-#define __memexitdata    __section(.memexit.data)
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-#define __memexitconst   __section(.memexit.rodata)
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+#define __meminitdata    __section(".meminit.data")
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+#define __meminitconst   __section(".meminit.rodata")
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+#define __memexit        __section(".memexit.text") __exitused __cold notrace
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+#define __memexitdata    __section(".memexit.data")
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+#define __memexitconst   __section(".memexit.rodata")
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 /* For assembly routines */
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 #define __HEAD		.section	".head.text","ax"
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@@ -133,10 +133,11 @@
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 #endif
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 extern initcall_entry_t __con_initcall_start[], __con_initcall_end[];
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-extern initcall_entry_t __security_initcall_start[], __security_initcall_end[];
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 /* Used for contructor calls. */
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 typedef void (*ctor_fn_t)(void);
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+
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+struct file_system_type;
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 /* Defined in init/main.c */
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 extern int do_one_initcall(initcall_t fn);
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@@ -147,8 +148,8 @@
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 /* used by init/main.c */
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 void setup_arch(char **);
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 void prepare_namespace(void);
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-void __init load_default_modules(void);
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-int __init init_rootfs(void);
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+void __init init_rootfs(void);
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+extern struct file_system_type rootfs_fs_type;
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 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
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 extern bool rodata_enabled;
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@@ -183,40 +184,79 @@
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  * as KEEP() in the linker script.
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  */
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+/* Format: <modname>__<counter>_<line>_<fn> */
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+#define __initcall_id(fn)					\
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+	__PASTE(__KBUILD_MODNAME,				\
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+	__PASTE(__,						\
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+	__PASTE(__COUNTER__,					\
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+	__PASTE(_,						\
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+	__PASTE(__LINE__,					\
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+	__PASTE(_, fn))))))
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+
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+/* Format: __<prefix>__<iid><id> */
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+#define __initcall_name(prefix, __iid, id)			\
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+	__PASTE(__,						\
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+	__PASTE(prefix,						\
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+	__PASTE(__,						\
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+	__PASTE(__iid, id))))
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+
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+#ifdef CONFIG_LTO_CLANG
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+/*
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+ * With LTO, the compiler doesn't necessarily obey link order for
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+ * initcalls. In order to preserve the correct order, we add each
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+ * variable into its own section and generate a linker script (in
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+ * scripts/link-vmlinux.sh) to specify the order of the sections.
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+ */
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+#define __initcall_section(__sec, __iid)			\
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+	#__sec ".init.." #__iid
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+
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+/*
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+ * With LTO, the compiler can rename static functions to avoid
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+ * global naming collisions. We use a global stub function for
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+ * initcalls to create a stable symbol name whose address can be
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+ * taken in inline assembly when PREL32 relocations are used.
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+ */
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+#define __initcall_stub(fn, __iid, id)				\
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+	__initcall_name(initstub, __iid, id)
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+
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+#define __define_initcall_stub(__stub, fn)			\
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+	int __init __cficanonical __stub(void);			\
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+	int __init __cficanonical __stub(void)			\
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+	{ 							\
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+		return fn();					\
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+	}							\
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+	__ADDRESSABLE(__stub)
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+#else
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+#define __initcall_section(__sec, __iid)			\
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+	#__sec ".init"
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+
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+#define __initcall_stub(fn, __iid, id)	fn
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+
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+#define __define_initcall_stub(__stub, fn)			\
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+	__ADDRESSABLE(fn)
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+#endif
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+
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 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
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-#define ___define_initcall(fn, id, __sec)			\
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-	__ADDRESSABLE(fn)					\
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-	asm(".section	\"" #__sec ".init\", \"a\"	\n"	\
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-	"__initcall_" #fn #id ":			\n"	\
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-	    ".long	" #fn " - .			\n"	\
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+#define ____define_initcall(fn, __stub, __name, __sec)		\
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+	__define_initcall_stub(__stub, fn)			\
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+	asm(".section	\"" __sec "\", \"a\"		\n"	\
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+	    __stringify(__name) ":			\n"	\
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+	    ".long	" __stringify(__stub) " - .	\n"	\
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 	    ".previous					\n");
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 #else
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-#ifdef CONFIG_LTO_CLANG
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-  /*
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-   * With LTO, the compiler doesn't necessarily obey link order for
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-   * initcalls, and the initcall variable needs to be globally unique
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-   * to avoid naming collisions.  In order to preserve the correct
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-   * order, we add each variable into its own section and generate a
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-   * linker script (in scripts/link-vmlinux.sh) to ensure the order
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-   * remains correct.  We also add a __COUNTER__ prefix to the name,
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-   * so we can retain the order of initcalls within each compilation
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-   * unit, and __LINE__ to make the names more unique.
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-   */
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-  #define ___lto_initcall(c, l, fn, id, __sec) \
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-	static initcall_t __initcall_##c##_##l##_##fn##id __used \
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-		__attribute__((__section__( #__sec \
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-			__stringify(.init..##c##_##l##_##fn)))) = fn;
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-  #define __lto_initcall(c, l, fn, id, __sec) \
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-	___lto_initcall(c, l, fn, id, __sec)
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+#define ____define_initcall(fn, __unused, __name, __sec)	\
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+	static initcall_t __name __used 			\
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+		__attribute__((__section__(__sec))) = fn;
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+#endif
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-  #define ___define_initcall(fn, id, __sec) \
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-	__lto_initcall(__COUNTER__, __LINE__, fn, id, __sec)
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-#else
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-  #define ___define_initcall(fn, id, __sec) \
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-	static initcall_t __initcall_##fn##id __used \
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-		__attribute__((__section__(#__sec ".init"))) = fn;
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-#endif
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-#endif
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+#define __unique_initcall(fn, id, __sec, __iid)			\
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+	____define_initcall(fn,					\
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+		__initcall_stub(fn, __iid, id),			\
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+		__initcall_name(initcall, __iid, id),		\
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+		__initcall_section(__sec, __iid))
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+
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+#define ___define_initcall(fn, id, __sec)			\
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+	__unique_initcall(fn, id, __sec, __initcall_id(fn))
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 #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
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@@ -258,7 +298,6 @@
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 	static exitcall_t __exitcall_##fn __exit_call = fn
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 #define console_initcall(fn)	___define_initcall(fn, con, .con_initcall)
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-#define security_initcall(fn)	___define_initcall(fn, security, .security_initcall)
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 struct obs_kernel_param {
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 	const char *str;
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@@ -276,7 +315,7 @@
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 	static const char __setup_str_##unique_id[] __initconst		\
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 		__aligned(1) = str; 					\
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 	static struct obs_kernel_param __setup_##unique_id		\
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-		__used __section(.init.setup)				\
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+		__used __section(".init.setup")				\
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 		__attribute__((aligned((sizeof(long)))))		\
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 		= { __setup_str_##unique_id, fn, early }
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@@ -320,7 +359,7 @@
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 #endif
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 /* Data marked not to be saved by software suspend */
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-#define __nosavedata __section(.data..nosave)
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+#define __nosavedata __section(".data..nosave")
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 #ifdef MODULE
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 #define __exit_p(x) x