From: "Paul E. McKenney" <paulmck@kernel.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Kees Cook <keescook@chromium.org>,
LKML <linux-kernel@vger.kernel.org>,
rcu@vger.kernel.org,
clang-built-linux <clang-built-linux@googlegroups.com>
Subject: Re: [PATCH v2] srcu: avoid escaped section names
Date: Fri, 2 Oct 2020 13:51:30 -0700 [thread overview]
Message-ID: <20201002205130.GK29330@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <CAKwvOd=nabONrWyYFK7Y06TrKBOyHHfNUiiy69VJQ2NtCpbp5Q@mail.gmail.com>
On Wed, Sep 30, 2020 at 01:55:48PM -0700, Nick Desaulniers wrote:
> On Wed, Sep 30, 2020 at 1:40 PM Paul E. McKenney <paulmck@kernel.org> wrote:
> >
> > On Tue, Sep 29, 2020 at 12:25:49PM -0700, Nick Desaulniers wrote:
> > > The stringification operator, `#`, in the preprocessor escapes strings.
> > > For example, `# "foo"` becomes `"\"foo\""`. GCC and Clang differ in how
> > > they treat section names that contain \".
> > >
> > > The portable solution is to not use a string literal with the
> > > preprocessor stringification operator.
> > >
> > > Link: https://bugs.llvm.org/show_bug.cgi?id=42950
> > > Fixes: commit fe15b50cdeee ("srcu: Allocate per-CPU data for DEFINE_SRCU() in modules")
> > > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> >
> > I am guessing that this needs to go up with other patches. If so:
> >
> > Acked-by: Paul E. McKenney <paulmck@kernel.org>
> >
> > If not, let me know and I will queue it.
>
> I could have bundled them up as a series. I think you can pick it up,
> and I'll owe you a beer?
It is queued, thank you!
When does it need to hit mainline? (Your default is the v5.11 merge
window, that is, the one following the upcoming merge window.)
Thanx, Paul
> > > ---
> > > Changes V1->V2:
> > > * drop unrelated Kconfig changes accidentally committed in v1.
> > >
> > > include/linux/srcutree.h | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h
> > > index 9cfcc8a756ae..9de652f4e1bd 100644
> > > --- a/include/linux/srcutree.h
> > > +++ b/include/linux/srcutree.h
> > > @@ -124,7 +124,7 @@ struct srcu_struct {
> > > # define __DEFINE_SRCU(name, is_static) \
> > > is_static struct srcu_struct name; \
> > > struct srcu_struct * const __srcu_struct_##name \
> > > - __section("___srcu_struct_ptrs") = &name
> > > + __section(___srcu_struct_ptrs) = &name
> > > #else
> > > # define __DEFINE_SRCU(name, is_static) \
> > > static DEFINE_PER_CPU(struct srcu_data, name##_srcu_data); \
> > > --
> > > 2.28.0.709.gb0816b6eb0-goog
> > >
>
>
>
> --
> Thanks,
> ~Nick Desaulniers
next prev parent reply other threads:[~2020-10-02 20:51 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 19:22 [PATCH] srcu: avoid escaped section names Nick Desaulniers
2020-09-29 19:22 ` Nick Desaulniers
2020-09-29 19:25 ` [PATCH v2] " Nick Desaulniers
2020-09-29 23:45 ` Kees Cook
2020-09-30 16:27 ` Nathan Chancellor
2020-09-30 16:41 ` Sedat Dilek
2020-09-30 18:57 ` Joe Perches
2020-09-30 19:16 ` [RFC PATCH next-20200930] treewide: Convert macro and uses of __section(foo) to __section("foo") Joe Perches
2020-09-30 21:40 ` Nick Desaulniers
2020-09-30 22:06 ` Joe Perches
2020-09-30 22:12 ` Joe Perches
2020-09-30 22:20 ` Nick Desaulniers
2020-09-30 22:25 ` Joe Perches
2020-09-30 22:56 ` Joe Perches
2020-10-01 10:15 ` Miguel Ojeda
2020-10-01 19:05 ` Joe Perches
2020-10-01 19:39 ` Segher Boessenkool
2020-10-01 20:19 ` Joe Perches
2020-10-05 18:36 ` Nick Desaulniers
2020-10-05 18:46 ` Joe Perches
2020-10-06 0:34 ` Joel Stanley
2020-10-06 3:22 ` Joe Perches
2020-09-30 20:40 ` [PATCH v2] srcu: avoid escaped section names Paul E. McKenney
2020-09-30 20:55 ` Nick Desaulniers
2020-10-02 20:51 ` Paul E. McKenney [this message]
2020-10-05 18:29 ` Nick Desaulniers
2020-10-05 18:38 ` Sedat Dilek
2020-10-05 18:49 ` Paul E. McKenney
2020-10-06 6:56 ` Nathan Chancellor
2020-10-07 21:05 ` Paul E. McKenney
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