diff options
| author | Glauber Costa <gcosta@redhat.com> | 2008-05-27 18:22:54 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 12:48:14 +0200 |
| commit | 9cf4f298e29abba25c16679fe7be70898223167e (patch) | |
| tree | 009af01f7c8001fb86fcfa25226d0c78248b83c9 | |
| parent | a7bf0bd5e6af7fe69342dabf2a3b721f0163469a (diff) | |
| download | linux-9cf4f298e29abba25c16679fe7be70898223167e.tar.bz2 | |
x86: use stack_start in x86_64
call x86_64's init_rsp stack_start, just as i386 does.
Put a zeroed stack segment for consistency. With this,
we can eliminate one ugly ifdef in smpboot.c.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/acpi/sleep.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/head_64.S | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 7 |
3 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 36af01f029ed..a81f468ab410 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -86,7 +86,7 @@ int acpi_save_state_mem(void) saved_magic = 0x12345678; #else /* CONFIG_64BIT */ header->trampoline_segment = setup_trampoline() >> 4; - init_rsp = (unsigned long)temp_stack + 4096; + stack_start.sp = temp_stack + 4096; initial_code = (unsigned long)wakeup_long64; saved_magic = 0x123456789abcdef0; #endif /* CONFIG_64BIT */ diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 263b9d14753e..918a2711aff6 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -191,7 +191,7 @@ ENTRY(secondary_startup_64) movq %rax, %cr0 /* Setup a boot time stack */ - movq init_rsp(%rip),%rsp + movq stack_start(%rip),%rsp /* zero EFLAGS after setting rsp */ pushq $0 @@ -252,8 +252,9 @@ ENTRY(secondary_startup_64) .quad x86_64_start_kernel __FINITDATA - ENTRY(init_rsp) + ENTRY(stack_start) .quad init_thread_union+THREAD_SIZE-8 + .word 0 bad_address: jmp bad_address diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index d3ad4e09455b..a71e3cad5470 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -714,11 +714,7 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) * target processor state. */ startup_ipi_hook(phys_apicid, (unsigned long) start_secondary, -#ifdef CONFIG_X86_64 - (unsigned long)init_rsp); -#else (unsigned long)stack_start.sp); -#endif /* * Run STARTUP IPI loop. @@ -905,15 +901,14 @@ do_rest: early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu); c_idle.idle->thread.ip = (unsigned long) start_secondary; /* Stack for startup_32 can be just as for start_secondary onwards */ - stack_start.sp = (void *) c_idle.idle->thread.sp; irq_ctx_init(cpu); #else cpu_pda(cpu)->pcurrent = c_idle.idle; - init_rsp = c_idle.idle->thread.sp; load_sp0(&per_cpu(init_tss, cpu), &c_idle.idle->thread); initial_code = (unsigned long)start_secondary; clear_tsk_thread_flag(c_idle.idle, TIF_FORK); #endif + stack_start.sp = (void *) c_idle.idle->thread.sp; /* start_ip had better be page-aligned! */ start_ip = setup_trampoline(); |