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41 lines
1 KiB
Diff
41 lines
1 KiB
Diff
From 0d37e6edc09c99e683dd91ca0e83bbc0df8477b3 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Sun, 16 Jul 2017 16:56:10 +0200
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Subject: lib: add uevent_next_seqnum()
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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include/linux/kobject.h | 5 +++++
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lib/kobject_uevent.c | 37 +++++++++++++++++++++++++++++++++++++
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2 files changed, 42 insertions(+)
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--- a/include/linux/kobject.h
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+++ b/include/linux/kobject.h
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@@ -219,4 +219,6 @@ int kobject_synth_uevent(struct kobject
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__printf(2, 3)
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int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...);
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+u64 uevent_next_seqnum(void);
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+
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#endif /* _KOBJECT_H_ */
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--- a/lib/kobject_uevent.c
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+++ b/lib/kobject_uevent.c
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@@ -178,6 +178,18 @@ out:
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return r;
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}
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+u64 uevent_next_seqnum(void)
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+{
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+ u64 seq;
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+
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+ mutex_lock(&uevent_sock_mutex);
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+ seq = atomic64_inc_return(&uevent_seqnum);
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+ mutex_unlock(&uevent_sock_mutex);
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+
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+ return seq;
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+}
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+EXPORT_SYMBOL_GPL(uevent_next_seqnum);
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+
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/**
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* kobject_synth_uevent - send synthetic uevent with arguments
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*
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