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arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE_RONX 

Both of these options are poorly named. The features they provide are
necessary for system security and should not be considered debug only.
Change the names to CONFIG_STRICT_KERNEL_RWX and
CONFIG_STRICT_MODULE_RWX to better describe what these options do.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Jessica Yu <jeyu@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Laura Abbott 2017-02-06 16:31:58 -08:00 committed by Kees Cook
parent ad21fc4faa
commit 0f5bf6d0af
24 changed files with 41 additions and 43 deletions
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8
Documentation/DocBook/kgdb.tmpl
View File

@ -115,12 +115,12 @@
</para> </para>
<para> <para>
If the architecture that you are using supports the kernel option If the architecture that you are using supports the kernel option
CONFIG_DEBUG_RODATA, you should consider turning it off. This CONFIG_STRICT_KERNEL_RWX, you should consider turning it off. This
option will prevent the use of software breakpoints because it option will prevent the use of software breakpoints because it
marks certain regions of the kernel's memory space as read-only. marks certain regions of the kernel's memory space as read-only.
If kgdb supports it for the architecture you are using, you can If kgdb supports it for the architecture you are using, you can
use hardware breakpoints if you desire to run with the use hardware breakpoints if you desire to run with the
CONFIG_DEBUG_RODATA option turned on, else you need to turn off CONFIG_STRICT_KERNEL_RWX option turned on, else you need to turn off
this option. this option.
</para> </para>
<para> <para>
@ -135,7 +135,7 @@
<para>Here is an example set of .config symbols to enable or <para>Here is an example set of .config symbols to enable or
disable for kgdb: disable for kgdb:
<itemizedlist> <itemizedlist>
<listitem><para># CONFIG_DEBUG_RODATA is not set</para></listitem> <listitem><para># CONFIG_STRICT_KERNEL_RWX is not set</para></listitem>
<listitem><para>CONFIG_FRAME_POINTER=y</para></listitem> <listitem><para>CONFIG_FRAME_POINTER=y</para></listitem>
<listitem><para>CONFIG_KGDB=y</para></listitem> <listitem><para>CONFIG_KGDB=y</para></listitem>
<listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem> <listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem>
@ -166,7 +166,7 @@
</para> </para>
<para>Here is an example set of .config symbols to enable/disable kdb: <para>Here is an example set of .config symbols to enable/disable kdb:
<itemizedlist> <itemizedlist>
<listitem><para># CONFIG_DEBUG_RODATA is not set</para></listitem> <listitem><para># CONFIG_STRICT_KERNEL_RWX is not set</para></listitem>
<listitem><para>CONFIG_FRAME_POINTER=y</para></listitem> <listitem><para>CONFIG_FRAME_POINTER=y</para></listitem>
<listitem><para>CONFIG_KGDB=y</para></listitem> <listitem><para>CONFIG_KGDB=y</para></listitem>
<listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem> <listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem>

4
Documentation/security/self-protection.txt
View File

@ -51,8 +51,8 @@ kernel, they are implemented in a way where the memory is temporarily
made writable during the update, and then returned to the original made writable during the update, and then returned to the original
permissions.) permissions.)
In support of this are (the poorly named) CONFIG_DEBUG_RODATA and In support of this are CONFIG_STRICT_KERNEL_RWX and
CONFIG_DEBUG_SET_MODULE_RONX, which seek to make sure that code is not CONFIG_STRICT_MODULE_RWX, which seek to make sure that code is not
writable, data is not executable, and read-only data is neither writable writable, data is not executable, and read-only data is neither writable
nor executable. nor executable.

4
arch/Kconfig
View File

@ -790,7 +790,7 @@ config ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
config ARCH_HAS_STRICT_KERNEL_RWX config ARCH_HAS_STRICT_KERNEL_RWX
def_bool n def_bool n
config DEBUG_RODATA config STRICT_KERNEL_RWX
bool "Make kernel text and rodata read-only" if ARCH_OPTIONAL_KERNEL_RWX bool "Make kernel text and rodata read-only" if ARCH_OPTIONAL_KERNEL_RWX
depends on ARCH_HAS_STRICT_KERNEL_RWX depends on ARCH_HAS_STRICT_KERNEL_RWX
default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
@ -806,7 +806,7 @@ config DEBUG_RODATA
config ARCH_HAS_STRICT_MODULE_RWX config ARCH_HAS_STRICT_MODULE_RWX
def_bool n def_bool n
config DEBUG_SET_MODULE_RONX config STRICT_MODULE_RWX
bool "Set loadable kernel module data as NX and text as RO" if ARCH_OPTIONAL_KERNEL_RWX bool "Set loadable kernel module data as NX and text as RO" if ARCH_OPTIONAL_KERNEL_RWX
depends on ARCH_HAS_STRICT_MODULE_RWX && MODULES depends on ARCH_HAS_STRICT_MODULE_RWX && MODULES
default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT

4
arch/arm/configs/aspeed_g4_defconfig
View File

@ -25,7 +25,6 @@ CONFIG_MODULE_UNLOAD=y
# CONFIG_ARCH_MULTI_V7 is not set # CONFIG_ARCH_MULTI_V7 is not set
CONFIG_ARCH_ASPEED=y CONFIG_ARCH_ASPEED=y
CONFIG_MACH_ASPEED_G4=y CONFIG_MACH_ASPEED_G4=y
CONFIG_DEBUG_RODATA=y
CONFIG_AEABI=y CONFIG_AEABI=y
CONFIG_UACCESS_WITH_MEMCPY=y CONFIG_UACCESS_WITH_MEMCPY=y
CONFIG_SECCOMP=y CONFIG_SECCOMP=y
@ -79,7 +78,8 @@ CONFIG_DEBUG_LL_UART_8250=y
CONFIG_DEBUG_UART_PHYS=0x1e784000 CONFIG_DEBUG_UART_PHYS=0x1e784000
CONFIG_DEBUG_UART_VIRT=0xe8784000 CONFIG_DEBUG_UART_VIRT=0xe8784000
CONFIG_EARLY_PRINTK=y CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_SET_MODULE_RONX=y CONFIG_STRICT_MODULE_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
# CONFIG_XZ_DEC_X86 is not set # CONFIG_XZ_DEC_X86 is not set
# CONFIG_XZ_DEC_POWERPC is not set # CONFIG_XZ_DEC_POWERPC is not set
# CONFIG_XZ_DEC_IA64 is not set # CONFIG_XZ_DEC_IA64 is not set

4
arch/arm/configs/aspeed_g5_defconfig
View File

@ -26,7 +26,6 @@ CONFIG_ARCH_MULTI_V6=y
# CONFIG_ARCH_MULTI_V7 is not set # CONFIG_ARCH_MULTI_V7 is not set
CONFIG_ARCH_ASPEED=y CONFIG_ARCH_ASPEED=y
CONFIG_MACH_ASPEED_G5=y CONFIG_MACH_ASPEED_G5=y
CONFIG_DEBUG_RODATA=y
CONFIG_AEABI=y CONFIG_AEABI=y
CONFIG_UACCESS_WITH_MEMCPY=y CONFIG_UACCESS_WITH_MEMCPY=y
CONFIG_SECCOMP=y CONFIG_SECCOMP=y
@ -81,7 +80,8 @@ CONFIG_DEBUG_LL_UART_8250=y
CONFIG_DEBUG_UART_PHYS=0x1e784000 CONFIG_DEBUG_UART_PHYS=0x1e784000
CONFIG_DEBUG_UART_VIRT=0xe8784000 CONFIG_DEBUG_UART_VIRT=0xe8784000
CONFIG_EARLY_PRINTK=y CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_SET_MODULE_RONX=y CONFIG_STRICT_MODULE_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
# CONFIG_XZ_DEC_X86 is not set # CONFIG_XZ_DEC_X86 is not set
# CONFIG_XZ_DEC_POWERPC is not set # CONFIG_XZ_DEC_POWERPC is not set
# CONFIG_XZ_DEC_IA64 is not set # CONFIG_XZ_DEC_IA64 is not set

2
arch/arm/include/asm/cacheflush.h
View File

@ -490,7 +490,7 @@ static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
#endif #endif
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
void set_kernel_text_rw(void); void set_kernel_text_rw(void);
void set_kernel_text_ro(void); void set_kernel_text_ro(void);
#else #else

4
arch/arm/kernel/patch.c
View File

@ -24,9 +24,9 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags)
bool module = !core_kernel_text(uintaddr); bool module = !core_kernel_text(uintaddr);
struct page *page; struct page *page;
if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX))
page = vmalloc_to_page(addr); page = vmalloc_to_page(addr);
else if (!module && IS_ENABLED(CONFIG_DEBUG_RODATA)) else if (!module && IS_ENABLED(CONFIG_STRICT_KERNEL_RWX))
page = virt_to_page(addr); page = virt_to_page(addr);
else else
return addr; return addr;

8
arch/arm/kernel/vmlinux.lds.S
View File

@ -97,7 +97,7 @@ SECTIONS
HEAD_TEXT HEAD_TEXT
} }
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT); . = ALIGN(1<<SECTION_SHIFT);
#endif #endif
@ -158,7 +158,7 @@ SECTIONS
NOTES NOTES
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT); . = ALIGN(1<<SECTION_SHIFT);
#else #else
. = ALIGN(PAGE_SIZE); . = ALIGN(PAGE_SIZE);
@ -230,7 +230,7 @@ SECTIONS
PERCPU_SECTION(L1_CACHE_BYTES) PERCPU_SECTION(L1_CACHE_BYTES)
#endif #endif
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
. = ALIGN(1<<SECTION_SHIFT); . = ALIGN(1<<SECTION_SHIFT);
#else #else
. = ALIGN(THREAD_SIZE); . = ALIGN(THREAD_SIZE);
@ -325,7 +325,7 @@ SECTIONS
STABS_DEBUG STABS_DEBUG
} }
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
/* /*
* Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
* be the first section-aligned location after __start_rodata. Otherwise, * be the first section-aligned location after __start_rodata. Otherwise,

2
arch/arm/mm/Kconfig
View File

@ -1053,7 +1053,7 @@ config ARCH_SUPPORTS_BIG_ENDIAN
config DEBUG_ALIGN_RODATA config DEBUG_ALIGN_RODATA
bool "Make rodata strictly non-executable" bool "Make rodata strictly non-executable"
depends on DEBUG_RODATA depends on STRICT_KERNEL_RWX
default y default y
help help
If this is set, rodata will be made explicitly non-executable. This If this is set, rodata will be made explicitly non-executable. This

4
arch/arm/mm/init.c
View File

@ -572,7 +572,7 @@ void __init mem_init(void)
} }
} }
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
struct section_perm { struct section_perm {
const char *name; const char *name;
unsigned long start; unsigned long start;
@ -741,7 +741,7 @@ void set_kernel_text_ro(void)
#else #else
static inline void fix_kernmem_perms(void) { } static inline void fix_kernmem_perms(void) { }
#endif /* CONFIG_DEBUG_RODATA */ #endif /* CONFIG_STRICT_KERNEL_RWX */
void free_tcmmem(void) void free_tcmmem(void)
{ {

2
arch/arm64/Kconfig.debug
View File

@ -72,7 +72,7 @@ config DEBUG_WX
If in doubt, say "Y". If in doubt, say "Y".
config DEBUG_ALIGN_RODATA config DEBUG_ALIGN_RODATA
depends on DEBUG_RODATA depends on STRICT_KERNEL_RWX
bool "Align linker sections up to SECTION_SIZE" bool "Align linker sections up to SECTION_SIZE"
help help
If this option is enabled, sections that may potentially be marked as If this option is enabled, sections that may potentially be marked as

2
arch/arm64/kernel/insn.c
View File

@ -93,7 +93,7 @@ static void __kprobes *patch_map(void *addr, int fixmap)
bool module = !core_kernel_text(uintaddr); bool module = !core_kernel_text(uintaddr);
struct page *page; struct page *page;
if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX))
page = vmalloc_to_page(addr); page = vmalloc_to_page(addr);
else if (!module) else if (!module)
page = pfn_to_page(PHYS_PFN(__pa(addr))); page = pfn_to_page(PHYS_PFN(__pa(addr)));

1
arch/parisc/configs/712_defconfig
View File

@ -182,7 +182,6 @@ CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_MUTEXES=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set # CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_DEBUG_RODATA=y
CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_TEST=m CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_HMAC=y CONFIG_CRYPTO_HMAC=y

1
arch/parisc/configs/c3000_defconfig
View File

@ -166,7 +166,6 @@ CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_MUTEXES=y
# CONFIG_DEBUG_BUGVERBOSE is not set # CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_RCU_CPU_STALL_DETECTOR is not set # CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_DEBUG_RODATA=y
CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_TEST=m CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_MD5=m CONFIG_CRYPTO_MD5=m

2
arch/parisc/mm/init.c
View File

@ -545,7 +545,7 @@ void free_initmem(void)
} }
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
void mark_rodata_ro(void) void mark_rodata_ro(void)
{ {
/* rodata memory was already mapped with KERNEL_RO access rights by /* rodata memory was already mapped with KERNEL_RO access rights by

4
include/linux/filter.h
View File

@ -543,7 +543,7 @@ static inline bool bpf_prog_was_classic(const struct bpf_prog *prog)
#define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0])) #define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0]))
#ifdef CONFIG_DEBUG_SET_MODULE_RONX #ifdef CONFIG_STRICT_MODULE_RWX
static inline void bpf_prog_lock_ro(struct bpf_prog *fp) static inline void bpf_prog_lock_ro(struct bpf_prog *fp)
{ {
set_memory_ro((unsigned long)fp, fp->pages); set_memory_ro((unsigned long)fp, fp->pages);
@ -561,7 +561,7 @@ static inline void bpf_prog_lock_ro(struct bpf_prog *fp)
static inline void bpf_prog_unlock_ro(struct bpf_prog *fp) static inline void bpf_prog_unlock_ro(struct bpf_prog *fp)
{ {
} }
#endif /* CONFIG_DEBUG_SET_MODULE_RONX */ #endif /* CONFIG_STRICT_MODULE_RWX */
int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap); int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap);
static inline int sk_filter(struct sock *sk, struct sk_buff *skb) static inline int sk_filter(struct sock *sk, struct sk_buff *skb)

4
include/linux/init.h
View File

@ -126,10 +126,10 @@ void prepare_namespace(void);
void __init load_default_modules(void); void __init load_default_modules(void);
int __init init_rootfs(void); int __init init_rootfs(void);
#if defined(CONFIG_DEBUG_RODATA) || defined(CONFIG_DEBUG_SET_MODULE_RONX) #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
extern bool rodata_enabled; extern bool rodata_enabled;
#endif #endif
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
void mark_rodata_ro(void); void mark_rodata_ro(void);
#endif #endif

2
include/linux/module.h
View File

@ -764,7 +764,7 @@ extern int module_sysfs_initialized;
#define __MODULE_STRING(x) __stringify(x) #define __MODULE_STRING(x) __stringify(x)
#ifdef CONFIG_DEBUG_SET_MODULE_RONX #ifdef CONFIG_STRICT_MODULE_RWX
extern void set_all_modules_text_rw(void); extern void set_all_modules_text_rw(void);
extern void set_all_modules_text_ro(void); extern void set_all_modules_text_ro(void);
extern void module_enable_ro(const struct module *mod, bool after_init); extern void module_enable_ro(const struct module *mod, bool after_init);

4
init/main.c
View File

@ -925,7 +925,7 @@ static int try_to_run_init_process(const char *init_filename)
static noinline void __init kernel_init_freeable(void); static noinline void __init kernel_init_freeable(void);
#if defined(CONFIG_DEBUG_RODATA) || defined(CONFIG_DEBUG_SET_MODULE_RONX) #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
bool rodata_enabled __ro_after_init = true; bool rodata_enabled __ro_after_init = true;
static int __init set_debug_rodata(char *str) static int __init set_debug_rodata(char *str)
{ {
@ -934,7 +934,7 @@ static int __init set_debug_rodata(char *str)
__setup("rodata=", set_debug_rodata); __setup("rodata=", set_debug_rodata);
#endif #endif
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
static void mark_readonly(void) static void mark_readonly(void)
{ {
if (rodata_enabled) if (rodata_enabled)

2
kernel/configs/android-recommended.config
View File

@ -11,7 +11,7 @@ CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=8192 CONFIG_BLK_DEV_RAM_SIZE=8192
CONFIG_COMPACTION=y CONFIG_COMPACTION=y
CONFIG_DEBUG_RODATA=y CONFIG_STRICT_KERNEL_RWX=y
CONFIG_DM_CRYPT=y CONFIG_DM_CRYPT=y
CONFIG_DM_UEVENT=y CONFIG_DM_UEVENT=y
CONFIG_DM_VERITY=y CONFIG_DM_VERITY=y

6
kernel/module.c
View File

@ -74,9 +74,9 @@
/* /*
* Modules' sections will be aligned on page boundaries * Modules' sections will be aligned on page boundaries
* to ensure complete separation of code and data, but * to ensure complete separation of code and data, but
* only when CONFIG_DEBUG_SET_MODULE_RONX=y * only when CONFIG_STRICT_MODULE_RWX=y
*/ */
#ifdef CONFIG_DEBUG_SET_MODULE_RONX #ifdef CONFIG_STRICT_MODULE_RWX
# define debug_align(X) ALIGN(X, PAGE_SIZE) # define debug_align(X) ALIGN(X, PAGE_SIZE)
#else #else
# define debug_align(X) (X) # define debug_align(X) (X)
@ -1847,7 +1847,7 @@ static void mod_sysfs_teardown(struct module *mod)
mod_sysfs_fini(mod); mod_sysfs_fini(mod);
} }
#ifdef CONFIG_DEBUG_SET_MODULE_RONX #ifdef CONFIG_STRICT_MODULE_RWX
/* /*
* LKM RO/NX protection: protect module's text/ro-data * LKM RO/NX protection: protect module's text/ro-data
* from modification and any data from execution. * from modification and any data from execution.

2
kernel/power/hibernate.c
View File

@ -1156,7 +1156,7 @@ static int __init hibernate_setup(char *str)
} else if (!strncmp(str, "no", 2)) { } else if (!strncmp(str, "no", 2)) {
noresume = 1; noresume = 1;
nohibernate = 1; nohibernate = 1;
} else if (IS_ENABLED(CONFIG_DEBUG_RODATA) } else if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)
&& !strncmp(str, "protect_image", 13)) { && !strncmp(str, "protect_image", 13)) {
enable_restore_image_protection(); enable_restore_image_protection();
} }

4
kernel/power/power.h
View File

@ -61,12 +61,12 @@ extern int hibernation_snapshot(int platform_mode);
extern int hibernation_restore(int platform_mode); extern int hibernation_restore(int platform_mode);
extern int hibernation_platform_enter(void); extern int hibernation_platform_enter(void);
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
/* kernel/power/snapshot.c */ /* kernel/power/snapshot.c */
extern void enable_restore_image_protection(void); extern void enable_restore_image_protection(void);
#else #else
static inline void enable_restore_image_protection(void) {} static inline void enable_restore_image_protection(void) {}
#endif /* CONFIG_DEBUG_RODATA */ #endif /* CONFIG_STRICT_KERNEL_RWX */
#else /* !CONFIG_HIBERNATION */ #else /* !CONFIG_HIBERNATION */

4
kernel/power/snapshot.c
View File

@ -38,7 +38,7 @@
#include "power.h" #include "power.h"
#ifdef CONFIG_DEBUG_RODATA #ifdef CONFIG_STRICT_KERNEL_RWX
static bool hibernate_restore_protection; static bool hibernate_restore_protection;
static bool hibernate_restore_protection_active; static bool hibernate_restore_protection_active;
@ -73,7 +73,7 @@ static inline void hibernate_restore_protection_begin(void) {}
static inline void hibernate_restore_protection_end(void) {} static inline void hibernate_restore_protection_end(void) {}
static inline void hibernate_restore_protect_page(void *page_address) {} static inline void hibernate_restore_protect_page(void *page_address) {}
static inline void hibernate_restore_unprotect_page(void *page_address) {} static inline void hibernate_restore_unprotect_page(void *page_address) {}
#endif /* CONFIG_DEBUG_RODATA */ #endif /* CONFIG_STRICT_KERNEL_RWX */
static int swsusp_page_is_free(struct page *); static int swsusp_page_is_free(struct page *);
static void swsusp_set_page_forbidden(struct page *); static void swsusp_set_page_forbidden(struct page *);