From f8d50682cd1245f6f5ce4c846ca6f1bdc11255a6 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 14 May 2019 18:01:44 -0400 Subject: init / exit function ordering The vlib init function subsystem now supports a mix of procedural and formally-specified ordering constraints. We should eliminate procedural knowledge wherever possible. The following schemes are *roughly* equivalent: static clib_error_t *init_runs_first (vlib_main_t *vm) { clib_error_t *error; ... do some stuff... if ((error = vlib_call_init_function (init_runs_next))) return error; ... } VLIB_INIT_FUNCTION (init_runs_first); and static clib_error_t *init_runs_first (vlib_main_t *vm) { ... do some stuff... } VLIB_INIT_FUNCTION (init_runs_first) = { .runs_before = VLIB_INITS("init_runs_next"), }; The first form will [most likely] call "init_runs_next" on the spot. The second form means that "init_runs_first" runs before "init_runs_next," possibly much earlier in the sequence. Please DO NOT construct sets of init functions where A before B actually means A *right before* B. It's not necessary - simply combine A and B - and it leads to hugely annoying debugging exercises when trying to switch from ad-hoc procedural ordering constraints to formal ordering constraints. Change-Id: I5e4353503bf43b4acb11a45fb33c79a5ade8426c Signed-off-by: Dave Barach --- src/plugins/avf/device.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'src/plugins/avf/device.c') diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c index 7d01149a1a0..74b6ab4e4b0 100644 --- a/src/plugins/avf/device.c +++ b/src/plugins/avf/device.c @@ -1433,12 +1433,8 @@ clib_error_t * avf_init (vlib_main_t * vm) { avf_main_t *am = &avf_main; - clib_error_t *error; vlib_thread_main_t *tm = vlib_get_thread_main (); - if ((error = vlib_call_init_function (vm, pci_bus_init))) - return error; - vec_validate_aligned (am->per_thread_data, tm->n_vlib_mains - 1, CLIB_CACHE_LINE_BYTES); @@ -1448,7 +1444,12 @@ avf_init (vlib_main_t * vm) return 0; } -VLIB_INIT_FUNCTION (avf_init); +/* *INDENT-OFF* */ +VLIB_INIT_FUNCTION (avf_init) = +{ + .runs_after = VLIB_INITS ("pci_bus_init"), +}; +/* *INDENT-OFF* */ /* * fd.io coding-style-patch-verification: ON -- cgit 1.2.3-korg