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

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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>
This commit is contained in:
Zhu Guihua 2015-07-03 17:37:18 +08:00 committed by Ingo Molnar
parent d6f2d75a7a
commit 1db875631f
3 changed files with 5 additions and 6 deletions
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2
arch/x86/include/asm/espfix.h
View File

@ -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 */

7
arch/x86/kernel/espfix_64.c
View File

@ -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;

2
arch/x86/kernel/smpboot.c
View File

@ -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
/*