FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-20 08:22:39 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge branch 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse Source 
* 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  core: Clean up user return notifers use of per_cpu
This commit is contained in:
Linus Torvalds 2009-12-08 13:24:20 -08:00
commit 4d2a914239
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/user-return-notifier.c
View File

@ -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);