From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E234DC3A5A2 for ; Mon, 19 Aug 2019 18:05:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF18022CEB for ; Mon, 19 Aug 2019 18:05:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="i+MZ7iZz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727835AbfHSSFp (ORCPT ); Mon, 19 Aug 2019 14:05:45 -0400 Received: from mail-wr1-f66.google.com ([209.85.221.66]:33487 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726959AbfHSSFo (ORCPT ); Mon, 19 Aug 2019 14:05:44 -0400 Received: by mail-wr1-f66.google.com with SMTP id u16so9670171wrr.0; Mon, 19 Aug 2019 11:05:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=SXhIQ/zc6wcO31VB7m35TYOSZfJd3fuQtKqpuHQk6I0=; b=i+MZ7iZzhhKrS0wKdC9ZjNt0uqL0zeNMGp2J/4dPy8L/RtXFu2dK66cMbLOx+4nR4g unjTiOAHY5GspaS05xo9sz0MTzXPCUQepPeG5cbKWsSFWjWM9RwUgUEl/6pzQTVZtAPK VdMU712bEzc4tkS0gh+zNB2Qa2uj0pYe0W2MKK5I5YPVkVNP4GJVf4r04DBwvr0/O1hN w8dwLpIJtWMvUpYhqBia2EyrfEdKYwIAtkJZx+HOr/6g2xjdJPy0mHH8L3J5Bz4uRHBF p2ef2r4mMTslI6zanvJjFPnFAtbWvUJr8zLUr7JyVUPbgq9UFvE7rAKdH3+2y36nTLPt EVDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=SXhIQ/zc6wcO31VB7m35TYOSZfJd3fuQtKqpuHQk6I0=; b=jtUCSH3kz/R7Zwj4SIM/jlfGoMW74U6rKY06ZNEhMNOTX9YT0ItE+aqUWuCfolPQru b067yUwpIWrmkqd8enhpZuG5y0dgERu/6XWo1VlNi7M1kFCFbmQjO6t3PM4rXr76ailn Imk37vc7tSAwM6Cf/afZLWaqc8GYs+I/bic13aF/XaxZ9YxnRfUiVpW7Kgu/C1+diuqI mWqcsSOuozZMruLrNBYKp/2T0FWiYXsFt13xt1HGmrw7kz8b+AvakevAClfyZ33VmSfK +0muonKekTBTU4ZmBnIcdLHD9GSflUfHUMs1MrGZwGozSFoeD/ltvMMhb7jxlpxAeNnr lZ3w== X-Gm-Message-State: APjAAAVYZh1/SzYSJCqi4YCabG92T+971gIZovpbpZ9Mx4kRRSGaN5J3 FaJJSDpIoq/HLx62+sio2uC0S4eK/2kQ8pZAkcc= X-Google-Smtp-Source: APXvYqwb9JdefcGqvn4K0lUJgZCDMh5rLV3HCH8AME/JfNncC9b10FlzmlaHTKIBo2GAskS3+l27Mf4t9o060Wilk6U= X-Received: by 2002:a5d:4101:: with SMTP id l1mr30649034wrp.202.1566237940836; Mon, 19 Aug 2019 11:05:40 -0700 (PDT) MIME-Version: 1.0 References: <20190812215052.71840-1-ndesaulniers@google.com> <20190812215052.71840-14-ndesaulniers@google.com> In-Reply-To: <20190812215052.71840-14-ndesaulniers@google.com> Reply-To: sedat.dilek@gmail.com From: Sedat Dilek Date: Mon, 19 Aug 2019 20:05:28 +0200 Message-ID: Subject: Re: [PATCH 14/16] include/linux: prefer __section from compiler_attributes.h To: Nick Desaulniers Cc: akpm@linux-foundation.org, jpoimboe@redhat.com, yhs@fb.com, Miguel Ojeda , Clang-Built-Linux ML , Luc Van Oostenryck , Lai Jiangshan , "Paul E. McKenney" , Josh Triplett , Steven Rostedt , Mathieu Desnoyers , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Thomas Gleixner , Ingo Molnar , "Peter Zijlstra (Intel)" , Nicholas Piggin , Jiri Kosina , Will Deacon , Ard Biesheuvel , Michael Ellerman , Masahiro Yamada , Hans Liljestrand , Elena Reshetova , David Windsor , Marc Zyngier , Ming Lei , Dou Liyang , Julien Thierry , Mauro Carvalho Chehab , Jens Axboe , linux-kernel@vger.kernel.org, linux-sparse@vger.kernel.org, rcu@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org On Mon, Aug 12, 2019 at 11:53 PM Nick Desaulniers wrote: > > Link: https://github.com/ClangBuiltLinux/linux/issues/619 > Reported-by: Sedat Dilek > Suggested-by: Josh Poimboeuf > Signed-off-by: Nick Desaulniers Tested-by: Sedat Dilek [ Linux v5.3-rc5 ] Patchset "for-5.3/x86-section-name-escaping" (5 patches): compiler_attributes.h: add note about __section include/linux/compiler.h: remove unused KENTRY macro include/linux: prefer __section from compiler_attributes.h include/asm-generic: prefer __section from compiler_attributes.h x86: prefer __section from compiler_attributes.h Thanks. - Sedat - > --- > include/linux/cache.h | 6 +++--- > include/linux/compiler.h | 8 ++++---- > include/linux/cpu.h | 2 +- > include/linux/export.h | 2 +- > include/linux/init_task.h | 4 ++-- > include/linux/interrupt.h | 5 ++--- > include/linux/sched/debug.h | 2 +- > include/linux/srcutree.h | 2 +- > 8 files changed, 15 insertions(+), 16 deletions(-) > > diff --git a/include/linux/cache.h b/include/linux/cache.h > index 750621e41d1c..3f4df9eef1e1 100644 > --- a/include/linux/cache.h > +++ b/include/linux/cache.h > @@ -28,7 +28,7 @@ > * but may get written to during init, so can't live in .rodata (via "const"). > */ > #ifndef __ro_after_init > -#define __ro_after_init __attribute__((__section__(".data..ro_after_init"))) > +#define __ro_after_init __section(.data..ro_after_init) > #endif > > #ifndef ____cacheline_aligned > @@ -45,8 +45,8 @@ > > #ifndef __cacheline_aligned > #define __cacheline_aligned \ > - __attribute__((__aligned__(SMP_CACHE_BYTES), \ > - __section__(".data..cacheline_aligned"))) > + __aligned(SMP_CACHE_BYTES) \ > + __section(.data..cacheline_aligned) > #endif /* __cacheline_aligned */ > > #ifndef __cacheline_aligned_in_smp > diff --git a/include/linux/compiler.h b/include/linux/compiler.h > index f0fd5636fddb..5e88e7e33abe 100644 > --- a/include/linux/compiler.h > +++ b/include/linux/compiler.h > @@ -24,7 +24,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, > long ______r; \ > static struct ftrace_likely_data \ > __aligned(4) \ > - __section("_ftrace_annotated_branch") \ > + __section(_ftrace_annotated_branch) \ > ______f = { \ > .data.func = __func__, \ > .data.file = __FILE__, \ > @@ -60,7 +60,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, > #define __trace_if_value(cond) ({ \ > static struct ftrace_branch_data \ > __aligned(4) \ > - __section("_ftrace_branch") \ > + __section(_ftrace_branch) \ > __if_trace = { \ > .func = __func__, \ > .file = __FILE__, \ > @@ -118,7 +118,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, > ".popsection\n\t" > > /* Annotate a C jump table to allow objtool to follow the code flow */ > -#define __annotate_jump_table __section(".rodata..c_jump_table") > +#define __annotate_jump_table __section(.rodata..c_jump_table) > > #else > #define annotate_reachable() > @@ -298,7 +298,7 @@ unsigned long read_word_at_a_time(const void *addr) > * visible to the compiler. > */ > #define __ADDRESSABLE(sym) \ > - static void * __section(".discard.addressable") __used \ > + static void * __section(.discard.addressable) __used \ > __PASTE(__addressable_##sym, __LINE__) = (void *)&sym; > > /** > diff --git a/include/linux/cpu.h b/include/linux/cpu.h > index fcb1386bb0d4..186bbd79d6ce 100644 > --- a/include/linux/cpu.h > +++ b/include/linux/cpu.h > @@ -166,7 +166,7 @@ void cpu_startup_entry(enum cpuhp_state state); > void cpu_idle_poll_ctrl(bool enable); > > /* Attach to any functions which should be considered cpuidle. */ > -#define __cpuidle __attribute__((__section__(".cpuidle.text"))) > +#define __cpuidle __section(.cpuidle.text) > > bool cpu_in_idle(unsigned long pc); > > diff --git a/include/linux/export.h b/include/linux/export.h > index fd8711ed9ac4..808c1a0c2ef9 100644 > --- a/include/linux/export.h > +++ b/include/linux/export.h > @@ -104,7 +104,7 @@ struct kernel_symbol { > * discarded in the final link stage. > */ > #define __ksym_marker(sym) \ > - static int __ksym_marker_##sym[0] __section(".discard.ksym") __used > + static int __ksym_marker_##sym[0] __section(.discard.ksym) __used > > #define __EXPORT_SYMBOL(sym, sec) \ > __ksym_marker(sym); \ > diff --git a/include/linux/init_task.h b/include/linux/init_task.h > index 6049baa5b8bc..50139505da34 100644 > --- a/include/linux/init_task.h > +++ b/include/linux/init_task.h > @@ -51,12 +51,12 @@ extern struct cred init_cred; > > /* Attach to the init_task data structure for proper alignment */ > #ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK > -#define __init_task_data __attribute__((__section__(".data..init_task"))) > +#define __init_task_data __section(.data..init_task) > #else > #define __init_task_data /**/ > #endif > > /* Attach to the thread_info data structure for proper alignment */ > -#define __init_thread_info __attribute__((__section__(".data..init_thread_info"))) > +#define __init_thread_info __section(.data..init_thread_info) > > #endif > diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h > index 5b8328a99b2a..29debfe4dd0f 100644 > --- a/include/linux/interrupt.h > +++ b/include/linux/interrupt.h > @@ -741,8 +741,7 @@ extern int arch_early_irq_init(void); > /* > * We want to know which function is an entrypoint of a hardirq or a softirq. > */ > -#define __irq_entry __attribute__((__section__(".irqentry.text"))) > -#define __softirq_entry \ > - __attribute__((__section__(".softirqentry.text"))) > +#define __irq_entry __section(.irqentry.text) > +#define __softirq_entry __section(.softirqentry.text) > > #endif > diff --git a/include/linux/sched/debug.h b/include/linux/sched/debug.h > index 95fb9e025247..e17b66221fdd 100644 > --- a/include/linux/sched/debug.h > +++ b/include/linux/sched/debug.h > @@ -42,7 +42,7 @@ extern void proc_sched_set_task(struct task_struct *p); > #endif > > /* Attach to any functions which should be ignored in wchan output. */ > -#define __sched __attribute__((__section__(".sched.text"))) > +#define __sched __section(.sched.text) > > /* Linker adds these: start and end of __sched functions */ > extern char __sched_text_start[], __sched_text_end[]; > 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); \ > -- > 2.23.0.rc1.153.gdeed80330f-goog >