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| author | Avi Kivity <avi@redhat.com> | 2009-11-30 12:54:51 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-02 10:22:59 +0100 |
| commit | 1786bf009f18f722afbb62143c8541e7e60a4e92 (patch) | |
| tree | 04e84d487132ae66754f59911ffc4f658845d373 /kernel/user-return-notifier.c | |
| parent | 8e7cac79808b62f242069a6ac88d364d35621371 (diff) | |
| download | lwn-1786bf009f18f722afbb62143c8541e7e60a4e92.tar.gz lwn-1786bf009f18f722afbb62143c8541e7e60a4e92.zip | |
core: Clean up user return notifers use of per_cpu
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>
Diffstat (limited to 'kernel/user-return-notifier.c')
| -rw-r--r-- | kernel/user-return-notifier.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/user-return-notifier.c b/kernel/user-return-notifier.c index 03e2d6fd9b18..eb27fd3430a2 100644 --- a/kernel/user-return-notifier.c +++ b/kernel/user-return-notifier.c @@ -6,8 +6,6 @@ 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 * 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) { 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); @@ -27,7 +25,7 @@ EXPORT_SYMBOL_GPL(user_return_notifier_register); void user_return_notifier_unregister(struct user_return_notifier *urn) { 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); } EXPORT_SYMBOL_GPL(user_return_notifier_unregister); |