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xen64: get active_mm from the pda

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x86_64 stores the active_mm in the pda, so fetch it from there.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-07-08 15:06:40 -07:00 committed by Ingo Molnar
parent f5d36de069
commit ce87b3d326
1 changed files with 8 additions and 1 deletions
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9
arch/x86/xen/mmu.c
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@ -805,8 +805,15 @@ void xen_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
static void drop_other_mm_ref(void *info)
{
struct mm_struct *mm = info;
struct mm_struct *active_mm;
if (__get_cpu_var(cpu_tlbstate).active_mm == mm)
#ifdef CONFIG_X86_64
active_mm = read_pda(active_mm);
#else
active_mm = __get_cpu_var(cpu_tlbstate).active_mm;
#endif
if (active_mm == mm)
leave_mm(smp_processor_id());
/* If this cpu still has a stale cr3 reference, then make sure