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| author | Tejun Heo <tj@kernel.org> | 2024-02-16 08:10:01 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-02-16 19:33:43 +0300 |
| commit | fd0a68a2337b79a7bd4dad5e7d9dc726828527af (patch) | |
| tree | a0299d8a368233758daf7e786158a9ea1fb1d7f2 /init | |
| parent | 2f34d7337d98f3eae7bd3d1270efaf9d8a17cfc6 (diff) | |
| download | linux-fd0a68a2337b79a7bd4dad5e7d9dc726828527af.tar.xz | |
workqueue, irq_work: Build fix for !CONFIG_IRQ_WORK
2f34d7337d98 ("workqueue: Fix queue_work_on() with BH workqueues") added
irq_work usage to workqueue; however, it turns out irq_work is actually
optional and the change breaks build on configuration which doesn't have
CONFIG_IRQ_WORK enabled.
Fix build by making workqueue use irq_work only when CONFIG_SMP and enabling
CONFIG_IRQ_WORK when CONFIG_SMP is set. It's reasonable to argue that it may
be better to just always enable it. However, this still saves a small bit of
memory for tiny UP configs and also the least amount of change, so, for now,
let's keep it conditional.
Verified to do the right thing for x86_64 allnoconfig and defconfig, and
aarch64 allnoconfig, allnoconfig + prink disable (SMP but nothing selects
IRQ_WORK) and a modified aarch64 Kconfig where !SMP and nothing selects
IRQ_WORK.
v2: `depends on SMP` leads to Kconfig warnings when CONFIG_IRQ_WORK is
selected by something else when !CONFIG_SMP. Use `def_bool y if SMP`
instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Fixes: 2f34d7337d98 ("workqueue: Fix queue_work_on() with BH workqueues")
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index 8df18f3a9748..0d21c9e0398f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -106,7 +106,7 @@ config CONSTRUCTORS bool config IRQ_WORK - bool + def_bool y if SMP config BUILDTIME_TABLE_SORT bool |