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authorBrian Gerst <brgerst@gmail.com>2009-01-19 00:38:58 +0900
committerTejun Heo <tj@kernel.org>2009-01-19 00:38:58 +0900
commitea9279066de44053d0c20ea855bc9f4706652d84 (patch)
tree73c19b9112375ee0df8373b004105f05e1a196f4 /arch
parent92d65b2371d86d40807e1dbfdccadc4d501edcde (diff)
x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit.
tj: moved cpu_number definition out of CONFIG_HAVE_SETUP_PER_CPU_AREA for voyager. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/pda.h2
-rw-r--r--arch/x86/include/asm/smp.h4
-rw-r--r--arch/x86/kernel/asm-offsets_64.c1
-rw-r--r--arch/x86/kernel/cpu/common.c1
-rw-r--r--arch/x86/kernel/process_32.c3
-rw-r--r--arch/x86/kernel/setup_percpu.c10
-rw-r--r--arch/x86/kernel/smpcommon.c2
7 files changed, 12 insertions, 11 deletions
diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h
index 09965f7a216..668d5a5b6f7 100644
--- a/arch/x86/include/asm/pda.h
+++ b/arch/x86/include/asm/pda.h
@@ -16,7 +16,7 @@ struct x8664_pda {
unsigned long kernelstack; /* 16 top of kernel stack for current */
unsigned long oldrsp; /* 24 user rsp for system call */
int irqcount; /* 32 Irq nesting counter. Starts -1 */
- unsigned int cpunumber; /* 36 Logical CPU number */
+ unsigned int unused6; /* 36 was cpunumber */
#ifdef CONFIG_CC_STACKPROTECTOR
unsigned long stack_canary; /* 40 stack canary value */
/* gcc-ABI: this canary MUST be at
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index c7bbbbe65d3..68636e767a9 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -25,9 +25,7 @@ extern unsigned int num_processors;
DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_t, cpu_core_map);
DECLARE_PER_CPU(u16, cpu_llc_id);
-#ifdef CONFIG_X86_32
DECLARE_PER_CPU(int, cpu_number);
-#endif
static inline struct cpumask *cpu_sibling_mask(int cpu)
{
@@ -164,7 +162,7 @@ extern unsigned disabled_cpus __cpuinitdata;
extern int safe_smp_processor_id(void);
#elif defined(CONFIG_X86_64_SMP)
-#define raw_smp_processor_id() read_pda(cpunumber)
+#define raw_smp_processor_id() (percpu_read(cpu_number))
#define stack_smp_processor_id() \
({ \
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index 5b821fbdaf7..cae6697c099 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -53,7 +53,6 @@ int main(void)
ENTRY(oldrsp);
ENTRY(pcurrent);
ENTRY(irqcount);
- ENTRY(cpunumber);
DEFINE(pda_size, sizeof(struct x8664_pda));
BLANK();
#undef ENTRY
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index b6d7eec0be7..4221e920886 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -899,7 +899,6 @@ void __cpuinit pda_init(int cpu)
load_pda_offset(cpu);
- pda->cpunumber = cpu;
pda->irqcount = -1;
pda->kernelstack = (unsigned long)stack_thread_info() -
PDA_STACKOFFSET + THREAD_SIZE;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 77d546817d9..2c00a57ccb9 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -66,9 +66,6 @@ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
-DEFINE_PER_CPU(int, cpu_number);
-EXPORT_PER_CPU_SYMBOL(cpu_number);
-
/*
* Return saved PC of a blocked thread.
*/
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 8b53ef83c61..258497f93f4 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -22,6 +22,15 @@
# define DBG(x...)
#endif
+/*
+ * Could be inside CONFIG_HAVE_SETUP_PER_CPU_AREA with other stuff but
+ * voyager wants cpu_number too.
+ */
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(int, cpu_number);
+EXPORT_PER_CPU_SYMBOL(cpu_number);
+#endif
+
#ifdef CONFIG_X86_LOCAL_APIC
unsigned int num_processors;
unsigned disabled_cpus __cpuinitdata;
@@ -193,6 +202,7 @@ void __init setup_per_cpu_areas(void)
memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start);
per_cpu_offset(cpu) = ptr - __per_cpu_start;
per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
+ per_cpu(cpu_number, cpu) = cpu;
#ifdef CONFIG_X86_64
per_cpu(irq_stack_ptr, cpu) =
(char *)per_cpu(irq_stack, cpu) + IRQ_STACK_SIZE - 64;
diff --git a/arch/x86/kernel/smpcommon.c b/arch/x86/kernel/smpcommon.c
index 7e157810062..add36b4e37c 100644
--- a/arch/x86/kernel/smpcommon.c
+++ b/arch/x86/kernel/smpcommon.c
@@ -28,7 +28,5 @@ __cpuinit void init_gdt(int cpu)
write_gdt_entry(get_cpu_gdt_table(cpu),
GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S);
-
- per_cpu(cpu_number, cpu) = cpu;
}
#endif