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| author | Frederic Weisbecker <frederic@kernel.org> | 2021-04-09 00:38:59 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-05-10 16:03:35 -0700 |
| commit | 8e9c01c717df7e05c5bd1ca86aaa3a74b31f37f1 (patch) | |
| tree | 8f58eebf79cb94cd852cb024c231d2b1fe03332d /init | |
| parent | 7bf0a6141ab9c1d113bd85d6d13d43903a4278ba (diff) | |
| download | linux-8e9c01c717df7e05c5bd1ca86aaa3a74b31f37f1.tar.gz linux-8e9c01c717df7e05c5bd1ca86aaa3a74b31f37f1.tar.xz | |
srcu: Initialize SRCU after timers
Once srcu_init() is called, the SRCU core will make use of delayed
workqueues, which rely on timers. However init_timers() is called
several steps after rcu_init(). This means that a call_srcu() after
rcu_init() but before init_timers() would find itself within a dangerously
uninitialized timer core.
This commit therefore creates a separate call to srcu_init() after
init_timer() completes, which ensures that we stay in early SRCU mode
until timers are safe(r).
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Neeraj Upadhyay <neeraju@codeaurora.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c index eb01e121d2f1..7b6f49c4d388 100644 --- a/init/main.c +++ b/init/main.c @@ -42,6 +42,7 @@ #include <linux/profile.h> #include <linux/kfence.h> #include <linux/rcupdate.h> +#include <linux/srcu.h> #include <linux/moduleparam.h> #include <linux/kallsyms.h> #include <linux/writeback.h> @@ -979,6 +980,7 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) tick_init(); rcu_init_nohz(); init_timers(); + srcu_init(); hrtimers_init(); softirq_init(); timekeeping_init(); |