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| author |   Peter Zijlstra <peterz@infradead.org> | 2020-06-22 12:01:25 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2020-06-28 17:01:20 +0200 |
| commit | 8c4890d1c3358fb8023d46e1e554c41d54f02878 (patch) | |
| tree | 836a9611ccb151ac7d1e6f71c23b32a964164e9b /kernel/smp.c | |
| parent | sched/core: s/WF_ON_RQ/WQ_ON_CPU/ (diff) | |
| download | linux-dev-8c4890d1c3358fb8023d46e1e554c41d54f02878.tar.xz linux-dev-8c4890d1c3358fb8023d46e1e554c41d54f02878.zip | |
smp, irq_work: Continue smp_call_function*() and irq_work*() integration
Instead of relying on BUG_ON() to ensure the various data structures
line up, use a bunch of horrible unions to make it all automatic.
Much of the union magic is to ensure irq_work and smp_call_function do
not (yet) see the members of their respective data structures change
name.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/20200622100825.844455025@infradead.org
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 472c2b274c65..aa17eedff5be 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -669,24 +669,6 @@ void __init smp_init(void) { int num_nodes, num_cpus; - /* - * Ensure struct irq_work layout matches so that - * flush_smp_call_function_queue() can do horrible things. - */ - BUILD_BUG_ON(offsetof(struct irq_work, llnode) != - offsetof(struct __call_single_data, llist)); - BUILD_BUG_ON(offsetof(struct irq_work, func) != - offsetof(struct __call_single_data, func)); - BUILD_BUG_ON(offsetof(struct irq_work, flags) != - offsetof(struct __call_single_data, flags)); - - /* - * Assert the CSD_TYPE_TTWU layout is similar enough - * for task_struct to be on the @call_single_queue. - */ - BUILD_BUG_ON(offsetof(struct task_struct, wake_entry_type) - offsetof(struct task_struct, wake_entry) != - offsetof(struct __call_single_data, flags) - offsetof(struct __call_single_data, llist)); - idle_threads_init(); cpuhp_threads_init(); |