diff options
Diffstat (limited to 'patches/0015-s390-kernel-Use-stop_machine_cpuslocked.patch')
| -rw-r--r-- | patches/0015-s390-kernel-Use-stop_machine_cpuslocked.patch | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/patches/0015-s390-kernel-Use-stop_machine_cpuslocked.patch b/patches/0015-s390-kernel-Use-stop_machine_cpuslocked.patch deleted file mode 100644 index 961d6ed653c7..000000000000 --- a/patches/0015-s390-kernel-Use-stop_machine_cpuslocked.patch +++ /dev/null @@ -1,43 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Wed, 24 May 2017 10:15:26 +0200 -Subject: [PATCH 15/32] s390/kernel: Use stop_machine_cpuslocked() - -stp_work_fn() holds get_online_cpus() while invoking stop_machine(). - -stop_machine() invokes get_online_cpus() as well. This is correct, but -prevents the conversion of the hotplug locking to a percpu rwsem. - -Use stop_machine_cpuslocked() to avoid the nested call. Convert -*_online_cpus() to the new interfaces while at it. - -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> -Acked-by: Ingo Molnar <mingo@kernel.org> -Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> -Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> -Cc: linux-s390@vger.kernel.org -Cc: Peter Zijlstra <peterz@infradead.org> -Cc: Steven Rostedt <rostedt@goodmis.org> -Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> -Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> -Link: http://lkml.kernel.org/r/20170524081548.250203087@linutronix.de ---- - arch/s390/kernel/time.c | 6 +++--- - 1 file changed, 3 insertions(+), 3 deletions(-) - ---- a/arch/s390/kernel/time.c -+++ b/arch/s390/kernel/time.c -@@ -634,10 +634,10 @@ static void stp_work_fn(struct work_stru - goto out_unlock; - - memset(&stp_sync, 0, sizeof(stp_sync)); -- get_online_cpus(); -+ cpus_read_lock(); - atomic_set(&stp_sync.cpus, num_online_cpus() - 1); -- stop_machine(stp_sync_clock, &stp_sync, cpu_online_mask); -- put_online_cpus(); -+ stop_machine_cpuslocked(stp_sync_clock, &stp_sync, cpu_online_mask); -+ cpus_read_unlock(); - - if (!check_sync_clock()) - /* |