diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 88 | ||||
| -rw-r--r-- | include/linux/init.h | 77 |
2 files changed, 120 insertions, 45 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index ae0166e8349..e0a56fb8f81 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -9,10 +9,46 @@ /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) +/* The actual configuration determine if the init/exit sections + * are handled as text/data or they can be discarded (which + * often happens at runtime) + */ +#ifdef CONFIG_HOTPLUG +#define DEV_KEEP(sec) *(.dev##sec) +#define DEV_DISCARD(sec) +#else +#define DEV_KEEP(sec) +#define DEV_DISCARD(sec) *(.dev##sec) +#endif + +#ifdef CONFIG_HOTPLUG_CPU +#define CPU_KEEP(sec) *(.cpu##sec) +#define CPU_DISCARD(sec) +#else +#define CPU_KEEP(sec) +#define CPU_DISCARD(sec) *(.cpu##sec) +#endif + +#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \ + || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE) +#define MEM_KEEP(sec) *(.mem##sec) +#define MEM_DISCARD(sec) +#else +#define MEM_KEEP(sec) +#define MEM_DISCARD(sec) *(.mem##sec) +#endif + + /* .data section */ #define DATA_DATA \ *(.data) \ *(.data.init.refok) \ + DEV_KEEP(init.data) \ + DEV_KEEP(exit.data) \ + CPU_KEEP(init.data) \ + CPU_KEEP(exit.data) \ + MEM_KEEP(init.data) \ + MEM_KEEP(exit.data) \ . = ALIGN(8); \ VMLINUX_SYMBOL(__start___markers) = .; \ *(__markers) \ @@ -132,6 +168,16 @@ *(__ksymtab_strings) \ } \ \ + /* __*init sections */ \ + __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ + DEV_KEEP(init.rodata) \ + DEV_KEEP(exit.rodata) \ + CPU_KEEP(init.rodata) \ + CPU_KEEP(exit.rodata) \ + MEM_KEEP(init.rodata) \ + MEM_KEEP(exit.rodata) \ + } \ + \ /* Built-in module parameters. */ \ __param : AT(ADDR(__param) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___param) = .; \ @@ -139,7 +185,6 @@ VMLINUX_SYMBOL(__stop___param) = .; \ VMLINUX_SYMBOL(__end_rodata) = .; \ } \ - \ . = ALIGN((align)); /* RODATA provided for backward compatibility. @@ -159,7 +204,14 @@ ALIGN_FUNCTION(); \ *(.text) \ *(.text.init.refok) \ - *(.exit.text.refok) + *(.exit.text.refok) \ + DEV_KEEP(init.text) \ + DEV_KEEP(exit.text) \ + CPU_KEEP(init.text) \ + CPU_KEEP(exit.text) \ + MEM_KEEP(init.text) \ + MEM_KEEP(exit.text) + /* sched.text is aling to function alignment to secure we have same * address even at second ld pass when generating System.map */ @@ -184,11 +236,35 @@ VMLINUX_SYMBOL(__kprobes_text_end) = .; /* init and exit section handling */ -#define INIT_TEXT *(.init.text) -#define INIT_DATA *(.init.data) -#define EXIT_TEXT *(.exit.text) -#define EXIT_DATA *(.exit.data) +#define INIT_DATA \ + *(.init.data) \ + DEV_DISCARD(init.data) \ + DEV_DISCARD(init.rodata) \ + CPU_DISCARD(init.data) \ + CPU_DISCARD(init.rodata) \ + MEM_DISCARD(init.data) \ + MEM_DISCARD(init.rodata) + +#define INIT_TEXT \ + *(.init.text) \ + DEV_DISCARD(init.text) \ + CPU_DISCARD(init.text) \ + MEM_DISCARD(init.text) + +#define EXIT_DATA \ + *(.exit.data) \ + DEV_DISCARD(exit.data) \ + DEV_DISCARD(exit.rodata) \ + CPU_DISCARD(exit.data) \ + CPU_DISCARD(exit.rodata) \ + MEM_DISCARD(exit.data) \ + MEM_DISCARD(exit.rodata) +#define EXIT_TEXT \ + *(.exit.text) \ + DEV_DISCARD(exit.text) \ + CPU_DISCARD(exit.text) \ + MEM_DISCARD(exit.text) /* DWARF debug sections. Symbols in the DWARF debugging sections are relative to diff --git a/include/linux/init.h b/include/linux/init.h index 99807681840..dcb66c76bd4 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -60,18 +60,54 @@ #define __exit_refok noinline __section(.exit.text.refok) #ifdef MODULE -#define __exit __section(.exit.text) __cold +#define __exitused #else -#define __exit __attribute_used__ __section(.exit.text) __cold +#define __exitused __used #endif +#define __exit __section(.exit.text) __exitused __cold + +/* Used for HOTPLUG */ +#define __devinit __section(.devinit.text) __cold +#define __devinitdata __section(.devinit.data) +#define __devinitconst __section(.devinit.rodata) +#define __devexit __section(.devexit.text) __exitused __cold +#define __devexitdata __section(.devexit.data) +#define __devexitconst __section(.devexit.rodata) + +/* Used for HOTPLUG_CPU */ +#define __cpuinit __section(.cpuinit.text) __cold +#define __cpuinitdata __section(.cpuinit.data) +#define __cpuinitconst __section(.cpuinit.rodata) +#define __cpuexit __section(.cpuexit.text) __exitused __cold +#define __cpuexitdata __section(.cpuexit.data) +#define __cpuexitconst __section(.cpuexit.rodata) + +/* Used for MEMORY_HOTPLUG */ +#define __meminit __section(.meminit.text) __cold +#define __meminitdata __section(.meminit.data) +#define __meminitconst __section(.meminit.rodata) +#define __memexit __section(.memexit.text) __exitused __cold +#define __memexitdata __section(.memexit.data) +#define __memexitconst __section(.memexit.rodata) + /* For assembly routines */ #define __INIT .section ".init.text","ax" #define __INIT_REFOK .section ".text.init.refok","ax" #define __FINIT .previous + #define __INITDATA .section ".init.data","aw" #define __INITDATA_REFOK .section ".data.init.refok","aw" +#define __DEVINIT .section ".devinit.text", "ax" +#define __DEVINITDATA .section ".devinit.data", "aw" + +#define __CPUINIT .section ".cpuinit.text", "ax" +#define __CPUINITDATA .section ".cpuinit.data", "aw" + +#define __MEMINIT .section ".meminit.text", "ax" +#define __MEMINITDATA .section ".meminit.data", "aw" + #ifndef __ASSEMBLY__ /* * Used for initialization calls.. @@ -254,43 +290,6 @@ void __init parse_early_param(void); #define __initdata_or_module __initdata #endif /*CONFIG_MODULES*/ -#ifdef CONFIG_HOTPLUG -#define __devinit -#define __devinitdata -#define __devexit -#define __devexitdata -#else -#define __devinit __init -#define __devinitdata __initdata -#define __devexit __exit -#define __devexitdata __exitdata -#endif - -#ifdef CONFIG_HOTPLUG_CPU -#define __cpuinit -#define __cpuinitdata -#define __cpuexit -#define __cpuexitdata -#else -#define __cpuinit __init -#define __cpuinitdata __initdata -#define __cpuexit __exit -#define __cpuexitdata __exitdata -#endif - -#if defined(CONFIG_MEMORY_HOTPLUG) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) \ - || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE) -#define __meminit -#define __meminitdata -#define __memexit -#define __memexitdata -#else -#define __meminit __init -#define __meminitdata __initdata -#define __memexit __exit -#define __memexitdata __exitdata -#endif - /* Functions marked as __devexit may be discarded at kernel link time, depending on config options. Newer versions of binutils detect references from retained sections to discarded sections and flag an error. Pointers to |