diff options
| author | Kees Cook <keescook@chromium.org> | 2017-05-09 23:00:51 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-06-22 03:10:12 +0200 |
| commit | c0944883c97c0ddc71da67cc731590a7c878a1a2 (patch) | |
| tree | a417cfd4da063f8071650c3667b5e901942b37c9 | |
| parent | Linux 4.12-rc6 (diff) | |
| download | linux-c0944883c97c0ddc71da67cc731590a7c878a1a2.tar.xz linux-c0944883c97c0ddc71da67cc731590a7c878a1a2.zip | |
x86/power/64: Use char arrays for asm function names
This switches the hibernate_64.S function names into character arrays
to match other areas of the kernel where this is done (e.g., linker
scripts). Specifically this fixes a compile-time error noticed by the
future CONFIG_FORTIFY_SOURCE routines that complained about PAGE_SIZE
being copied out of the "single byte" core_restore_code variable.
Additionally drops the "acpi_save_state_mem" exern which does not
appear to be used anywhere else in the kernel.
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | arch/x86/include/asm/suspend_64.h | 5 | ||||
| -rw-r--r-- | arch/x86/power/hibernate_64.c | 6 |
2 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/include/asm/suspend_64.h b/arch/x86/include/asm/suspend_64.h index 6136a18152af..2bd96b4df140 100644 --- a/arch/x86/include/asm/suspend_64.h +++ b/arch/x86/include/asm/suspend_64.h @@ -42,8 +42,7 @@ struct saved_context { set_debugreg((thread)->debugreg##register, register) /* routines for saving/restoring kernel state */ -extern int acpi_save_state_mem(void); -extern char core_restore_code; -extern char restore_registers; +extern char core_restore_code[]; +extern char restore_registers[]; #endif /* _ASM_X86_SUSPEND_64_H */ diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c index a6e21fee22ea..2ab1c5059a61 100644 --- a/arch/x86/power/hibernate_64.c +++ b/arch/x86/power/hibernate_64.c @@ -147,7 +147,7 @@ static int relocate_restore_code(void) if (!relocated_restore_code) return -ENOMEM; - memcpy((void *)relocated_restore_code, &core_restore_code, PAGE_SIZE); + memcpy((void *)relocated_restore_code, core_restore_code, PAGE_SIZE); /* Make the page containing the relocated code executable */ pgd = (pgd_t *)__va(read_cr3()) + pgd_index(relocated_restore_code); @@ -292,8 +292,8 @@ int arch_hibernation_header_save(void *addr, unsigned int max_size) if (max_size < sizeof(struct restore_data_record)) return -EOVERFLOW; - rdr->jump_address = (unsigned long)&restore_registers; - rdr->jump_address_phys = __pa_symbol(&restore_registers); + rdr->jump_address = (unsigned long)restore_registers; + rdr->jump_address_phys = __pa_symbol(restore_registers); rdr->cr3 = restore_cr3; rdr->magic = RESTORE_MAGIC; |