From b4e8ae5c8c41355791a99fdf2fcac16deace1e79 Mon Sep 17 00:00:00 2001 From: Stefan Roesch Date: Tue, 6 Feb 2024 09:30:04 -0700 Subject: net: add napi_busy_loop_rcu() This adds the napi_busy_loop_rcu() function. This function assumes that the calling function is already holding the rcu read lock and napi_busy_loop() does not need to take the rcu read lock. Add a NAPI_F_NO_SCHED flag, which tells __napi_busy_loop() to abort if we need to reschedule rather than drop the RCU read lock and reschedule. Signed-off-by: Stefan Roesch Link: https://lore.kernel.org/r/20230608163839.2891748-3-shr@devkernel.io Signed-off-by: Jens Axboe Signed-off-by: Jakub Kicinski --- include/net/busy_poll.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net') diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h index 4dabeb6c76d3..9b09acac538e 100644 --- a/include/net/busy_poll.h +++ b/include/net/busy_poll.h @@ -48,6 +48,10 @@ void napi_busy_loop(unsigned int napi_id, bool (*loop_end)(void *, unsigned long), void *loop_end_arg, bool prefer_busy_poll, u16 budget); +void napi_busy_loop_rcu(unsigned int napi_id, + bool (*loop_end)(void *, unsigned long), + void *loop_end_arg, bool prefer_busy_poll, u16 budget); + #else /* CONFIG_NET_RX_BUSY_POLL */ static inline unsigned long net_busy_loop_on(void) { -- cgit