From b2b18660066997420b716c1881a6be8b82700d97 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sat, 25 Jun 2005 14:55:38 -0700 Subject: [PATCH] RCU: clean up a few remaining synchronize_kernel() calls 2.6.12-rc6-mm1 has a few remaining synchronize_kernel()s, some (but not all) in comments. This patch changes these synchronize_kernel() calls (and comments) to synchronize_rcu() or synchronize_sched() as follows: - arch/x86_64/kernel/mce.c mce_read(): change to synchronize_sched() to handle races with machine-check exceptions (synchronize_rcu() would not cut it given RCU implementations intended for hardcore realtime use. - drivers/input/serio/i8042.c i8042_stop(): change to synchronize_sched() to handle races with i8042_interrupt() interrupt handler. Again, synchronize_rcu() would not cut it given RCU implementations intended for hardcore realtime use. - include/*/kdebug.h comments: change to synchronize_sched() to handle races with NMIs. As before, synchronize_rcu() would not cut it... - include/linux/list.h comment: change to synchronize_rcu(), since this comment is for list_del_rcu(). - security/keys/key.c unregister_key_type(): change to synchronize_rcu(), since this is interacting with RCU read side. - security/keys/process_keys.c install_session_keyring(): change to synchronize_rcu(), since this is interacting with RCU read side. Signed-off-by: "Paul E. McKenney" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- security/keys/key.c | 2 +- security/keys/process_keys.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'security') diff --git a/security/keys/key.c b/security/keys/key.c index 3304d37bb37..fb89f984446 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -980,7 +980,7 @@ void unregister_key_type(struct key_type *ktype) spin_unlock(&key_serial_lock); /* make sure everyone revalidates their keys */ - synchronize_kernel(); + synchronize_rcu(); /* we should now be able to destroy the payloads of all the keys of * this type with impunity */ diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c index 34db087bbcc..9b0369c5a22 100644 --- a/security/keys/process_keys.c +++ b/security/keys/process_keys.c @@ -234,7 +234,7 @@ static int install_session_keyring(struct task_struct *tsk, ret = 0; /* we're using RCU on the pointer */ - synchronize_kernel(); + synchronize_rcu(); key_put(old); error: return ret; -- cgit v1.2.3-18-g5258