diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-01-08 06:48:15 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 07:12:05 -0800 |
| commit | 4d86b1e7e1e98eb1f0e3c5a4635a5c37cbd22919 (patch) | |
| tree | 6168181a0fbdc8c7e906975d6d2e88ac06600b15 /include | |
| parent | 780818a68132d45d074353fc66f5f116074c3c14 (diff) | |
srcu: Add SRCU_READ_FLAVOR_SLOWGP to flag need for synchronize_rcu()
This commit switches from a direct test of SRCU_READ_FLAVOR_LITE to a new
SRCU_READ_FLAVOR_SLOWGP macro to check for substituting synchronize_rcu()
for smp_mb() in SRCU grace periods. Right now, SRCU_READ_FLAVOR_SLOWGP
is exactly SRCU_READ_FLAVOR_LITE, but the addition of the _fast() flavor
of SRCU will change that.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <bpf@vger.kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/srcu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index ca00b9af7c23..505f5bdce444 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -49,6 +49,9 @@ int init_srcu_struct(struct srcu_struct *ssp); #define SRCU_READ_FLAVOR_LITE 0x4 // srcu_read_lock_lite(). #define SRCU_READ_FLAVOR_ALL (SRCU_READ_FLAVOR_NORMAL | SRCU_READ_FLAVOR_NMI | \ SRCU_READ_FLAVOR_LITE) // All of the above. +#define SRCU_READ_FLAVOR_SLOWGP SRCU_READ_FLAVOR_LITE + // Flavors requiring synchronize_rcu() + // instead of smp_mb(). #ifdef CONFIG_TINY_SRCU #include <linux/srcutiny.h> |