x86: remove pda_init()

Impact: cleanup

Copy the code to cpu_init() to satisfy the requirement that the cpu
be reinitialized.  Remove all other calls, since the segments are
already initialized in head_64.S.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h
index 4a8c9d3..b473e95 100644 (file)
--- a/arch/x86/include/asm/pda.h
+++ b/arch/x86/include/asm/pda.h
@@ -24,7 +24,6 @@ struct x8664_pda {
 } ____cacheline_aligned_in_smp;
 
 DECLARE_PER_CPU(struct x8664_pda, __pda);
-extern void pda_init(int);
 
 #define cpu_pda(cpu)           (&per_cpu(__pda, cpu))
 

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 7976a6a..f83a4d6 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -895,15 +895,6 @@ EXPORT_PER_CPU_SYMBOL(kernel_stack);
 
 DEFINE_PER_CPU(unsigned int, irq_count) = -1;
 
-void __cpuinit pda_init(int cpu)
-{
-       /* Setup up data that may be needed in __get_free_pages early */
-       loadsegment(fs, 0);
-       loadsegment(gs, 0);
-
-       load_pda_offset(cpu);
-}
-
 static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
        [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ])
        __aligned(PAGE_SIZE);
@@ -967,9 +958,9 @@ void __cpuinit cpu_init(void)
        struct task_struct *me;
        int i;
 
-       /* CPU 0 is initialised in head64.c */
-       if (cpu != 0)
-               pda_init(cpu);
+       loadsegment(fs, 0);
+       loadsegment(gs, 0);
+       load_pda_offset(cpu);
 
 #ifdef CONFIG_NUMA
        if (cpu != 0 && percpu_read(node_number) == 0 &&

diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index af67d32..f5b2722 100644 (file)
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -91,8 +91,6 @@ void __init x86_64_start_kernel(char * real_mode_data)
        if (console_loglevel == 10)
                early_printk("Kernel alive\n");
 
-       pda_init(0);
-
        x86_64_start_reservations(real_mode_data);
 }
 

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 75b9413..bef941f 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1645,7 +1645,6 @@ asmlinkage void __init xen_start_kernel(void)
 #ifdef CONFIG_X86_64
        /* Disable until direct per-cpu data access. */
        have_vcpu_info_placement = 0;
-       pda_init(0);
 #endif
 
        xen_smp_init();