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Subject[PATCH v2 1/2] nfit: Fix the abuse of COMPLETION_INITIALIZER_ONSTACK()
COMPLETION_INITIALIZER_ONSTACK() is supposed to used as an initializer,
in other words, it should only be used in assignment expressions or
compound literals. So the usage in drivers/acpi/nfit/core.c:


, is inappropriate.

Besides, this usage could also break compilations for another fix to
reduce stack sizes caused by COMPLETION_INITIALIZER_ONSTACK(), because
that fix changes COMPLETION_INITIALIZER_ONSTACK() from rvalue to lvalue,
and usage as above will report error:

drivers/acpi/nfit/core.c: In function 'acpi_nfit_flush_probe':
include/linux/completion.h:77:3: error: value computed is not used [-Werror=unused-value]
(*({ init_completion(&work); &work; }))

This patch fixes this by replacing COMPLETION_INITIALIZER_ONSTACK() with
init_completion() in acpi_nfit_flush_probe(), which does the same
initialization without any other problem.

Signed-off-by: Boqun Feng <>
drivers/acpi/nfit/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 19182d091587..1893e416e7c0 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2884,7 +2884,7 @@ static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
* need to be interruptible while waiting.
INIT_WORK_ONSTACK(&, flush_probe);
+ init_completion(&flush.cmp);
queue_work(nfit_wq, &;

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