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| author | Sean Paul <seanpaul@chromium.org> | 2017-06-27 11:36:28 -0400 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2017-06-27 11:36:28 -0400 |
| commit | c048c984de38d906bb0df56ec2ae90eafc123d0a (patch) | |
| tree | 4e670e712aeedcaf2e2193b64f9120e03320e01c /kernel/livepatch/patch.c | |
| parent | 38cb266ad1a24e037220dc563ab46364595b17b6 (diff) | |
| parent | 6d61e70ccc21606ffb8a0a03bd3aba24f659502b (diff) | |
Merge remote-tracking branch 'airlied/drm-next' into drm-misc-next-fixes
Backmerge drm-next with rc7
Diffstat (limited to 'kernel/livepatch/patch.c')
| -rw-r--r-- | kernel/livepatch/patch.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c index f8269036bf0b..52c4e907c14b 100644 --- a/kernel/livepatch/patch.c +++ b/kernel/livepatch/patch.c @@ -59,7 +59,11 @@ static void notrace klp_ftrace_handler(unsigned long ip, ops = container_of(fops, struct klp_ops, fops); - rcu_read_lock(); + /* + * A variant of synchronize_sched() is used to allow patching functions + * where RCU is not watching, see klp_synchronize_transition(). + */ + preempt_disable_notrace(); func = list_first_or_null_rcu(&ops->func_stack, struct klp_func, stack_node); @@ -115,7 +119,7 @@ static void notrace klp_ftrace_handler(unsigned long ip, klp_arch_set_pc(regs, (unsigned long)func->new_func); unlock: - rcu_read_unlock(); + preempt_enable_notrace(); } /* |