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Livepatching changes for 5.13

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Merge tag 'livepatching-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching

Pull livepatching update from Petr Mladek:

 - Use TIF_NOTIFY_SIGNAL infrastructure instead of the fake signal

* tag 'livepatching-for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
  livepatch: Replace the fake signal sending with TIF_NOTIFY_SIGNAL infrastructure
This commit is contained in:
Linus Torvalds 2021-04-27 18:14:38 -07:00
commit eb6bbacc46
2 changed files with 3 additions and 6 deletions
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5
kernel/livepatch/transition.c
View File

@ -9,6 +9,7 @@
#include <linux/cpu.h>
#include <linux/stacktrace.h>
#include <linux/tracehook.h>
#include "core.h"
#include "patch.h"
#include "transition.h"
@ -369,9 +370,7 @@ static void klp_send_signals(void)
* Send fake signal to all non-kthread tasks which are
* still not migrated.
*/
spin_lock_irq(&task->sighand->siglock);
signal_wake_up(task, 0);
spin_unlock_irq(&task->sighand->siglock);
set_notify_signal(task);
}
}
read_unlock(&tasklist_lock);

4
kernel/signal.c
View File

@ -43,7 +43,6 @@
#include <linux/cn_proc.h>
#include <linux/compiler.h>
#include <linux/posix-timers.h>
#include <linux/livepatch.h>
#include <linux/cgroup.h>
#include <linux/audit.h>
@ -181,8 +180,7 @@ void recalc_sigpending_and_wake(struct task_struct *t)
void recalc_sigpending(void)
{
if (!recalc_sigpending_tsk(current) && !freezing(current) &&
!klp_patch_pending(current))
if (!recalc_sigpending_tsk(current) && !freezing(current))
clear_thread_flag(TIF_SIGPENDING);
}