Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [PATCH] Support resetting WARN*_ONCE | Date | Fri, 03 Nov 2017 20:39:56 +1100 |
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Andi Kleen <andi@firstfloor.org> writes:
> diff --git a/kernel/panic.c b/kernel/panic.c > index bdd18afa19a4..b2d872fa16de 100644 > --- a/kernel/panic.c > +++ b/kernel/panic.c > @@ -587,6 +588,32 @@ void warn_slowpath_null(const char *file, int line) > EXPORT_SYMBOL(warn_slowpath_null); > #endif > > +#ifdef CONFIG_BUG > + > +/* Support resetting WARN*_ONCE state */ > + > +static int clear_warn_once_set(void *data, u64 val) > +{ > + memset(__start_once, 0, __end_once - __start_once); > + return 0; > +} > + > +DEFINE_SIMPLE_ATTRIBUTE(clear_warn_once_fops, > + NULL, > + clear_warn_once_set, > + "%lld\n"); > + > +static __init int register_warn_debugfs(void) > +{ > + /* Don't care about failure */ > + debugfs_create_file("clear_warn_once", 0644, NULL, ^
Wouldn't 0200 be more appropriate if it's only writable?
Otherwise it appears readable, but cat'ing it gives you an error.
cheers
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