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core: Clean up user return notifers use of per_cpu

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Instead of using per_cpu(..., raw_smp_processor_id()), use
__get_cpu_var(...).

Signed-off-by: Avi Kivity <avi@redhat.com>
LKML-Reference: <1259578491-4589-1-git-send-email-avi@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Avi Kivity 2009-11-30 12:54:51 +02:00 committed by Ingo Molnar
parent 8e7cac7980
commit 1786bf009f
1 changed files with 2 additions and 4 deletions
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6
kernel/user-return-notifier.c
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@ -6,8 +6,6 @@
static DEFINE_PER_CPU(struct hlist_head, return_notifier_list); static DEFINE_PER_CPU(struct hlist_head, return_notifier_list);
#define URN_LIST_HEAD per_cpu(return_notifier_list, raw_smp_processor_id())
/* /*
* Request a notification when the current cpu returns to userspace. Must be * Request a notification when the current cpu returns to userspace. Must be
* called in atomic context. The notifier will also be called in atomic * called in atomic context. The notifier will also be called in atomic
@ -16,7 +14,7 @@ static DEFINE_PER_CPU(struct hlist_head, return_notifier_list);
void user_return_notifier_register(struct user_return_notifier *urn) void user_return_notifier_register(struct user_return_notifier *urn)
{ {
set_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY); set_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY);
hlist_add_head(&urn->link, &URN_LIST_HEAD); hlist_add_head(&urn->link, &__get_cpu_var(return_notifier_list));
} }
EXPORT_SYMBOL_GPL(user_return_notifier_register); EXPORT_SYMBOL_GPL(user_return_notifier_register);
@ -27,7 +25,7 @@ EXPORT_SYMBOL_GPL(user_return_notifier_register);
void user_return_notifier_unregister(struct user_return_notifier *urn) void user_return_notifier_unregister(struct user_return_notifier *urn)
{ {
hlist_del(&urn->link); hlist_del(&urn->link);
if (hlist_empty(&URN_LIST_HEAD)) if (hlist_empty(&__get_cpu_var(return_notifier_list)))
clear_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY); clear_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY);
} }
EXPORT_SYMBOL_GPL(user_return_notifier_unregister); EXPORT_SYMBOL_GPL(user_return_notifier_unregister);