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eventfd: Export eventfd_wake_count to modules

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Export eventfd_wake_count so that some modules can use
the eventfd_signal_count() to check whether the
eventfd_signal() call should be deferred to a safe context.

NB(mst): this patch is not needed in Linus tree since there
eventfd_signal_count() has been superseded by an already exported
eventfd_signal_allowed().

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20210831103634.33-3-xieyongji@bytedance.com
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xie Yongji 2021-08-31 18:36:23 +08:00 committed by Michael S. Tsirkin
parent a93a962669
commit 7a6b92d33a
1 changed files with 1 additions and 0 deletions
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fs/eventfd.c
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@ -26,6 +26,7 @@
#include <linux/uio.h>
DEFINE_PER_CPU(int, eventfd_wake_count);
EXPORT_PER_CPU_SYMBOL_GPL(eventfd_wake_count);
static DEFINE_IDA(eventfd_ida);