x86/espfix: Add 'cpu' parameter to init_espfix_ap()

Add a CPU index parameter to init_espfix_ap(), so that the
parameter could be propagated to the function for espfix
page allocation.

Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Cc: <bp@alien8.de>
Cc: <luto@amacapital.net>
Cc: <luto@kernel.org>
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/cde3fcf1b3211f3f03feb1a995bce3fee850f0fc.1435824469.git.zhugh.fnst@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/include/asm/espfix.h b/arch/x86/include/asm/espfix.h
index 99efebb..ca3ce9a 100644 (file)
--- a/arch/x86/include/asm/espfix.h
+++ b/arch/x86/include/asm/espfix.h
@@ -9,7 +9,7 @@ DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack);
 DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_waddr);
 
 extern void init_espfix_bsp(void);
-extern void init_espfix_ap(void);
+extern void init_espfix_ap(int cpu);
 
 #endif /* CONFIG_X86_64 */
 

diff --git a/arch/x86/kernel/espfix_64.c b/arch/x86/kernel/espfix_64.c
index f5d0730..1fb0e00 100644 (file)
--- a/arch/x86/kernel/espfix_64.c
+++ b/arch/x86/kernel/espfix_64.c
@@ -131,12 +131,12 @@ void __init init_espfix_bsp(void)
        init_espfix_random();
 
        /* The rest is the same as for any other processor */
-       init_espfix_ap();
+       init_espfix_ap(0);
 }
 
-void init_espfix_ap(void)
+void init_espfix_ap(int cpu)
 {
-       unsigned int cpu, page;
+       unsigned int page;
        unsigned long addr;
        pud_t pud, *pud_p;
        pmd_t pmd, *pmd_p;
@@ -149,7 +149,6 @@ void init_espfix_ap(void)
        if (likely(this_cpu_read(espfix_stack)))
                return;         /* Already initialized */
 
-       cpu = smp_processor_id();
        addr = espfix_base_addr(cpu);
        page = cpu/ESPFIX_STACKS_PER_PAGE;
 

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 8add66b..6f5abac 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -242,7 +242,7 @@ static void notrace start_secondary(void *unused)
         * Enable the espfix hack for this CPU
         */
 #ifdef CONFIG_X86_ESPFIX64
-       init_espfix_ap();
+       init_espfix_ap(smp_processor_id());
 #endif
 
        /*