Commit-ID: 1786bf009f18f722afbb62143c8541e7e60a4e92
Gitweb: http://git.kernel.org/tip/1786bf009f18f722afbb62143c8541e7e60a4e92
Author: Avi Kivity <avi@xxxxxxxxxx>
AuthorDate: Mon, 30 Nov 2009 12:54:51 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 2 Dec 2009 10:22:59 +0100
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@xxxxxxxxxx>
LKML-Reference: <1259578491-4589-1-git-send-email-avi@xxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
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 03e2d6f..eb27fd3 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);
--
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