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| author | Andy Lutomirski <luto@kernel.org> | 2016-07-14 13:22:58 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-15 10:26:30 +0200 |
| commit | fb59831b496a5bb7d0a06c7e702d88d1757edfca (patch) | |
| tree | df86fd0026872d3199223cc42e5f53ca2ef5ebe6 | |
| parent | 13d4ea097d18b419ad2a2b696063d44bf59acec0 (diff) | |
| download | op-kernel-dev-fb59831b496a5bb7d0a06c7e702d88d1757edfca.zip op-kernel-dev-fb59831b496a5bb7d0a06c7e702d88d1757edfca.tar.gz | |
x86/smp: Remove stack_smp_processor_id()
It serves no purpose -- raw_smp_processor_id() works fine. This
change will be needed to move thread_info off the stack.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/a2bf4f07fbc30fb32f9f7f3f8f94ad3580823847.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/cpu.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/smp.h | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 2 |
3 files changed, 1 insertions, 8 deletions
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index 678637a..59d34c5 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -17,7 +17,6 @@ static inline void prefill_possible_map(void) {} #define cpu_physical_id(cpu) boot_cpu_physical_apicid #define safe_smp_processor_id() 0 -#define stack_smp_processor_id() 0 #endif /* CONFIG_SMP */ diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h index 66b0573..0576b61 100644 --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -172,12 +172,6 @@ extern int safe_smp_processor_id(void); #elif defined(CONFIG_X86_64_SMP) #define raw_smp_processor_id() (this_cpu_read(cpu_number)) -#define stack_smp_processor_id() \ -({ \ - struct thread_info *ti; \ - __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ - ti->cpu; \ -}) #define safe_smp_processor_id() smp_processor_id() #endif diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 0fe6953f..d22a7b9 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1452,7 +1452,7 @@ void cpu_init(void) struct task_struct *me; struct tss_struct *t; unsigned long v; - int cpu = stack_smp_processor_id(); + int cpu = raw_smp_processor_id(); int i; wait_for_master_cpu(cpu); |
