Linux v5.0-rc7
This commit is contained in:
Laura Abbott
parent
7f7300be61
commit
16332ac6b7
@ -1,450 +0,0 @@
|
||||
From patchwork Sat Feb 9 00:08:38 2019
|
||||
Content-Type: text/plain; charset="utf-8"
|
||||
MIME-Version: 1.0
|
||||
Content-Transfer-Encoding: 7bit
|
||||
X-Patchwork-Submitter: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
X-Patchwork-Id: 1040186
|
||||
Return-Path: <SRS0=1U6d=QQ=vger.kernel.org=linux-kernel-owner@kernel.org>
|
||||
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
|
||||
by smtp.lore.kernel.org (Postfix) with ESMTP id CF5ACC169C4
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:48 +0000 (UTC)
|
||||
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
|
||||
by mail.kernel.org (Postfix) with ESMTP id 9B6A22177B
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:48 +0000 (UTC)
|
||||
Authentication-Results: mail.kernel.org;
|
||||
dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com
|
||||
header.b="fBDNHARm"
|
||||
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
|
||||
id S1726847AbfBIAJH (ORCPT
|
||||
<rfc822;linux-kernel@archiver.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:07 -0500
|
||||
Received: from mail-wm1-f66.google.com ([209.85.128.66]:35134 "EHLO
|
||||
mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
|
||||
with ESMTP id S1726222AbfBIAJH (ORCPT
|
||||
<rfc822;linux-kernel@vger.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:07 -0500
|
||||
Received: by mail-wm1-f66.google.com with SMTP id t200so6175302wmt.0
|
||||
for <linux-kernel@vger.kernel.org>;
|
||||
Fri, 08 Feb 2019 16:09:05 -0800 (PST)
|
||||
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=gmail.com; s=20161025;
|
||||
h=from:to:cc:subject:date:message-id:in-reply-to:references;
|
||||
bh=oYZRhi80jnWf5lvJ9rxSq8k+5uIG9VwWaCu5KNmb2Io=;
|
||||
b=fBDNHARmMKhmm+ePaNJj9txjNbOdazSkbZWB/n5YjOQJiidCJgtPUkWYcWKtUsrySa
|
||||
trWv7EzzGxFKTM9ccHPDsc7WS8wtoOlUSU00LZPieepciKS24buQhuHPZFvVIRn+531E
|
||||
WXI4lpQh/8WxwUBQRjxoDJhdHoBt66E/f63atN5vJMnc3ThZSTsQ4Sfu52xF44sOuN/B
|
||||
TE10KX4vZtqb0SGWn2TObNYiAWh6hRVzo8h9o1Ako8t4KyfHIuMFlVsnHfG/afjhbNIN
|
||||
haKI0M5yLUxjlEGqljgCH6x51eoDN5o5GVzckrZ1zUZDuRe5854+1nj6iZ4SKOFLM5/t
|
||||
hg6g==
|
||||
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=1e100.net; s=20161025;
|
||||
h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to
|
||||
:references;
|
||||
bh=oYZRhi80jnWf5lvJ9rxSq8k+5uIG9VwWaCu5KNmb2Io=;
|
||||
b=EaydbtrOBjU5ArDWvIEICz9CCbooh+J6TlXBqzt2APusJL1ADHL7AiL3IFoZYivKAy
|
||||
dLXHrxdC+hMc+C0rufUF1wvkTxF6SPYKcJTAUvfCoH1wkqarOXxObgmGmjeijAuUz288
|
||||
VjD5hgExmBvZ+o66edIlkKQJsAWsIuDqXusyYilSoN5QYBYSBmB530Y2yfX+6gXM5Tn7
|
||||
9ZrYp/qiujklOWITA1apRD4MMpP2b3P32zxvG/HzP33sm4EZVf935TaUlcjJkan7UqIs
|
||||
ycdaD3KcYyiAbxn6hv0RrFV+bX2V7IaurX3cnF5iGt12WTYOtC2UizjA9vjC6Ns2zS+1
|
||||
uejQ==
|
||||
X-Gm-Message-State: AHQUAuY6BHyRa9wiG2h1k9f9xax3Up2BqnNZu3xueFVVQc0q4ArgMZlr
|
||||
s+LA0mz9JF3YQMPyfq9jGdJkNupaJ8fp5g==
|
||||
X-Google-Smtp-Source:
|
||||
AHgI3IbP7F6OnN6J3jwdNsAPLLKsA8GObtlao2W2lxU4EKIzxT9TvoA9f9ljD5W+YZ8ax1/9FCi/xw==
|
||||
X-Received: by 2002:adf:f487:: with SMTP id l7mr531117wro.86.1549670944704;
|
||||
Fri, 08 Feb 2019 16:09:04 -0800 (PST)
|
||||
Received: from localhost.localdomain (79.108.96.12.dyn.user.ono.com.
|
||||
[79.108.96.12])
|
||||
by smtp.gmail.com with ESMTPSA id
|
||||
65sm10483171wrb.62.2019.02.08.16.09.03
|
||||
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
|
||||
Fri, 08 Feb 2019 16:09:04 -0800 (PST)
|
||||
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
To: linux-kernel@vger.kernel.org
|
||||
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
|
||||
Laura Abbott <labbott@redhat.com>,
|
||||
Martin Sebor <msebor@gcc.gnu.org>,
|
||||
Arnd Bergmann <arnd@arndb.de>,
|
||||
Herbert Xu <herbert@gondor.apana.org.au>,
|
||||
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
|
||||
Krzysztof Kozlowski <krzk@kernel.org>,
|
||||
Catalin Marinas <catalin.marinas@arm.com>
|
||||
Subject: [PATCH 1/3] lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases
|
||||
as __pure
|
||||
Date: Sat, 9 Feb 2019 01:08:38 +0100
|
||||
Message-Id: <20190209000840.11018-2-miguel.ojeda.sandonis@gmail.com>
|
||||
In-Reply-To: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
References: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
Sender: linux-kernel-owner@vger.kernel.org
|
||||
Precedence: bulk
|
||||
List-ID: <linux-kernel.vger.kernel.org>
|
||||
X-Mailing-List: linux-kernel@vger.kernel.org
|
||||
|
||||
The upcoming GCC 9 release extends the -Wmissing-attributes warnings
|
||||
(enabled by -Wall) to C and aliases: it warns when particular function
|
||||
attributes are missing in the aliases but not in their target.
|
||||
|
||||
In particular, it triggers here because crc32_le_base/__crc32c_le_base
|
||||
aren't __pure while their target crc32_le/__crc32c_le are.
|
||||
|
||||
These aliases are used by architectures as a fallback in accelerated
|
||||
versions of CRC32. See commit 9784d82db3eb ("lib/crc32: make core crc32()
|
||||
routines weak so they can be overridden").
|
||||
|
||||
Therefore, being fallbacks, it is likely that even if the aliases
|
||||
were called from C, there wouldn't be any optimizations possible.
|
||||
Currently, the only user is arm64, which calls this from asm.
|
||||
|
||||
Still, marking the aliases as __pure makes sense and is a good idea
|
||||
for documentation purposes and possible future optimizations,
|
||||
which also silences the warning.
|
||||
|
||||
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
|
||||
Tested-by: Laura Abbott <labbott@redhat.com>
|
||||
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
---
|
||||
lib/crc32.c | 4 ++--
|
||||
1 file changed, 2 insertions(+), 2 deletions(-)
|
||||
|
||||
diff --git a/lib/crc32.c b/lib/crc32.c
|
||||
index 45b1d67a1767..4a20455d1f61 100644
|
||||
--- a/lib/crc32.c
|
||||
+++ b/lib/crc32.c
|
||||
@@ -206,8 +206,8 @@ u32 __pure __weak __crc32c_le(u32 crc, unsigned char const *p, size_t len)
|
||||
EXPORT_SYMBOL(crc32_le);
|
||||
EXPORT_SYMBOL(__crc32c_le);
|
||||
|
||||
-u32 crc32_le_base(u32, unsigned char const *, size_t) __alias(crc32_le);
|
||||
-u32 __crc32c_le_base(u32, unsigned char const *, size_t) __alias(__crc32c_le);
|
||||
+u32 __pure crc32_le_base(u32, unsigned char const *, size_t) __alias(crc32_le);
|
||||
+u32 __pure __crc32c_le_base(u32, unsigned char const *, size_t) __alias(__crc32c_le);
|
||||
|
||||
/*
|
||||
* This multiplies the polynomials x and y modulo the given modulus.
|
||||
|
||||
From patchwork Sat Feb 9 00:08:39 2019
|
||||
Content-Type: text/plain; charset="utf-8"
|
||||
MIME-Version: 1.0
|
||||
Content-Transfer-Encoding: 8bit
|
||||
X-Patchwork-Submitter: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
X-Patchwork-Id: 1040187
|
||||
Return-Path: <SRS0=1U6d=QQ=vger.kernel.org=linux-kernel-owner@kernel.org>
|
||||
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
|
||||
by smtp.lore.kernel.org (Postfix) with ESMTP id 06134C282CC
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:49 +0000 (UTC)
|
||||
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
|
||||
by mail.kernel.org (Postfix) with ESMTP id C797721841
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:48 +0000 (UTC)
|
||||
Authentication-Results: mail.kernel.org;
|
||||
dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com
|
||||
header.b="MirIZ+3P"
|
||||
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
|
||||
id S1726894AbfBIAJI (ORCPT
|
||||
<rfc822;linux-kernel@archiver.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:08 -0500
|
||||
Received: from mail-wm1-f65.google.com ([209.85.128.65]:52552 "EHLO
|
||||
mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
|
||||
with ESMTP id S1726211AbfBIAJI (ORCPT
|
||||
<rfc822;linux-kernel@vger.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:08 -0500
|
||||
Received: by mail-wm1-f65.google.com with SMTP id m1so6280200wml.2
|
||||
for <linux-kernel@vger.kernel.org>;
|
||||
Fri, 08 Feb 2019 16:09:06 -0800 (PST)
|
||||
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=gmail.com; s=20161025;
|
||||
h=from:to:cc:subject:date:message-id:in-reply-to:references
|
||||
:mime-version:content-transfer-encoding;
|
||||
bh=5ORFvEqPg40FyrMt/fLXHHlLvflq3laGk3IRwh/eP24=;
|
||||
b=MirIZ+3PsN5et4GxGn+L8yDCYRFmolz3ch2quRams1L4kezKyKP8T1h/lMWw4HLw3j
|
||||
qflJWUF7dxCkRm9BZo5oB9P1g8LduJUF6eDllCAeVgX9Ucjiv9YL/CzuxxnMIcZCxhQ3
|
||||
Cvaitucrcr2zoCbinGZJ3UTMc87z41zG++3beXvnGOW8yVGbD9SSsh+rnqC0zPT8/le6
|
||||
ahFOr3X3hhXMequKxkYzpCl2B6rvjNHHKZAgHiWpfIFYdPXiNzw/ynmgjlE7d30YyEfJ
|
||||
lCUE9f2pQkLwezxuilWYIRJzGpL6oFcbp7tncmhyw08pUI8DI/2BLVSq39ygOuxSXs+N
|
||||
Yz5A==
|
||||
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=1e100.net; s=20161025;
|
||||
h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to
|
||||
:references:mime-version:content-transfer-encoding;
|
||||
bh=5ORFvEqPg40FyrMt/fLXHHlLvflq3laGk3IRwh/eP24=;
|
||||
b=VJIGQ/B70+kuZ0LEtdZ+dy4ex6I17bzPvCety3qDUtq1XpARIvFjmxjYdoXNPjbPpz
|
||||
ma7ZZvXNVeDUTgAd2flnsyjzk9RMNokT2w7YWltBGZgiNxoPzrobHKhLyfdjUWgjo5FH
|
||||
bHuUDJKAf6EMFUiMcWbgvXA7PTLvF2kZ0b9Sm5n+pViOQcdu6lHSbWb8nJgCcyoHNf0v
|
||||
2Yv+wtop89bM3YkbE/pCq5XIepi6Po4gnmlmlRxrhGQ6/GWGcaxX2UeEb6nEXaQAXMjB
|
||||
AwlzqzcATrbX6OFKYyfYv15g4ZRqHneZxyQPz76ntnlTqoDmZyFaD2sbLHb4ca50WqEX
|
||||
ZXJw==
|
||||
X-Gm-Message-State: AHQUAuamoKJjvGO/OyguJDIQG1W8Frj/lI1c6vr8G/4NidoSHwrlsusG
|
||||
k2VpBk2l8HS/ovAHysacldfMzUN77xdVvg==
|
||||
X-Google-Smtp-Source:
|
||||
AHgI3IYsXZWonq/T/Yz16YT3iZm6Rkmn7EyPr0s0FcW+a9bKEfN4EiUiDsqJUDrfOy02pYl4uzpiQA==
|
||||
X-Received: by 2002:adf:ca13:: with SMTP id
|
||||
o19mr18202139wrh.148.1549670946088;
|
||||
Fri, 08 Feb 2019 16:09:06 -0800 (PST)
|
||||
Received: from localhost.localdomain (79.108.96.12.dyn.user.ono.com.
|
||||
[79.108.96.12])
|
||||
by smtp.gmail.com with ESMTPSA id
|
||||
65sm10483171wrb.62.2019.02.08.16.09.04
|
||||
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
|
||||
Fri, 08 Feb 2019 16:09:05 -0800 (PST)
|
||||
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
To: linux-kernel@vger.kernel.org
|
||||
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
|
||||
Martin Sebor <msebor@gcc.gnu.org>,
|
||||
Arnd Bergmann <arnd@arndb.de>,
|
||||
Laura Abbott <labbott@redhat.com>,
|
||||
Nick Desaulniers <ndesaulniers@google.com>,
|
||||
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
|
||||
Andrey Konovalov <andreyknvl@google.com>,
|
||||
Kees Cook <keescook@chromium.org>,
|
||||
Sean Christopherson <sean.j.christopherson@intel.com>
|
||||
Subject: [PATCH 2/3] Compiler Attributes: add support for __copy (gcc >= 9)
|
||||
Date: Sat, 9 Feb 2019 01:08:39 +0100
|
||||
Message-Id: <20190209000840.11018-3-miguel.ojeda.sandonis@gmail.com>
|
||||
In-Reply-To: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
References: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
MIME-Version: 1.0
|
||||
Content-Type: text/plain; charset=UTF-8
|
||||
Sender: linux-kernel-owner@vger.kernel.org
|
||||
Precedence: bulk
|
||||
List-ID: <linux-kernel.vger.kernel.org>
|
||||
X-Mailing-List: linux-kernel@vger.kernel.org
|
||||
|
||||
From the GCC manual:
|
||||
|
||||
copy
|
||||
copy(function)
|
||||
|
||||
The copy attribute applies the set of attributes with which function
|
||||
has been declared to the declaration of the function to which
|
||||
the attribute is applied. The attribute is designed for libraries
|
||||
that define aliases or function resolvers that are expected
|
||||
to specify the same set of attributes as their targets. The copy
|
||||
attribute can be used with functions, variables, or types. However,
|
||||
the kind of symbol to which the attribute is applied (either
|
||||
function or variable) must match the kind of symbol to which
|
||||
the argument refers. The copy attribute copies only syntactic and
|
||||
semantic attributes but not attributes that affect a symbol’s
|
||||
linkage or visibility such as alias, visibility, or weak.
|
||||
The deprecated attribute is also not copied.
|
||||
|
||||
https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
|
||||
|
||||
The upcoming GCC 9 release extends the -Wmissing-attributes warnings
|
||||
(enabled by -Wall) to C and aliases: it warns when particular function
|
||||
attributes are missing in the aliases but not in their target, e.g.:
|
||||
|
||||
void __cold f(void) {}
|
||||
void __alias("f") g(void);
|
||||
|
||||
diagnoses:
|
||||
|
||||
warning: 'g' specifies less restrictive attribute than
|
||||
its target 'f': 'cold' [-Wmissing-attributes]
|
||||
|
||||
Using __copy(f) we can copy the __cold attribute from f to g:
|
||||
|
||||
void __cold f(void) {}
|
||||
void __copy(f) __alias("f") g(void);
|
||||
|
||||
This attribute is most useful to deal with situations where an alias
|
||||
is declared but we don't know the exact attributes the target has.
|
||||
|
||||
For instance, in the kernel, the widely used module_init/exit macros
|
||||
define the init/cleanup_module aliases, but those cannot be marked
|
||||
always as __init/__exit since they some modules do not have their
|
||||
functions marked as such.
|
||||
|
||||
Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
|
||||
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
|
||||
---
|
||||
include/linux/compiler_attributes.h | 14 ++++++++++++++
|
||||
1 file changed, 14 insertions(+)
|
||||
|
||||
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
|
||||
index 19f32b0c29af..6b318efd8a74 100644
|
||||
--- a/include/linux/compiler_attributes.h
|
||||
+++ b/include/linux/compiler_attributes.h
|
||||
@@ -34,6 +34,7 @@
|
||||
#ifndef __has_attribute
|
||||
# define __has_attribute(x) __GCC4_has_attribute_##x
|
||||
# define __GCC4_has_attribute___assume_aligned__ (__GNUC_MINOR__ >= 9)
|
||||
+# define __GCC4_has_attribute___copy__ 0
|
||||
# define __GCC4_has_attribute___designated_init__ 0
|
||||
# define __GCC4_has_attribute___externally_visible__ 1
|
||||
# define __GCC4_has_attribute___noclone__ 1
|
||||
@@ -100,6 +101,19 @@
|
||||
*/
|
||||
#define __attribute_const__ __attribute__((__const__))
|
||||
|
||||
+/*
|
||||
+ * Optional: only supported since gcc >= 9
|
||||
+ * Optional: not supported by clang
|
||||
+ * Optional: not supported by icc
|
||||
+ *
|
||||
+ * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-copy-function-attribute
|
||||
+ */
|
||||
+#if __has_attribute(__copy__)
|
||||
+# define __copy(symbol) __attribute__((__copy__(symbol)))
|
||||
+#else
|
||||
+# define __copy(symbol)
|
||||
+#endif
|
||||
+
|
||||
/*
|
||||
* Don't. Just don't. See commit 771c035372a0 ("deprecate the '__deprecated'
|
||||
* attribute warnings entirely and for good") for more information.
|
||||
|
||||
From patchwork Sat Feb 9 00:08:40 2019
|
||||
Content-Type: text/plain; charset="utf-8"
|
||||
MIME-Version: 1.0
|
||||
Content-Transfer-Encoding: 7bit
|
||||
X-Patchwork-Submitter: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
X-Patchwork-Id: 1040188
|
||||
Return-Path: <SRS0=1U6d=QQ=vger.kernel.org=linux-kernel-owner@kernel.org>
|
||||
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
|
||||
by smtp.lore.kernel.org (Postfix) with ESMTP id 32DFBC4151A
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:49 +0000 (UTC)
|
||||
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
|
||||
by mail.kernel.org (Postfix) with ESMTP id F415A2177B
|
||||
for <linux-kernel@archiver.kernel.org>; Sat, 9 Feb 2019 00:09:48 +0000 (UTC)
|
||||
Authentication-Results: mail.kernel.org;
|
||||
dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com
|
||||
header.b="fnSxCEl/"
|
||||
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
|
||||
id S1726952AbfBIAJK (ORCPT
|
||||
<rfc822;linux-kernel@archiver.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:10 -0500
|
||||
Received: from mail-wm1-f67.google.com ([209.85.128.67]:37227 "EHLO
|
||||
mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
|
||||
with ESMTP id S1726222AbfBIAJJ (ORCPT
|
||||
<rfc822;linux-kernel@vger.kernel.org>);
|
||||
Fri, 8 Feb 2019 19:09:09 -0500
|
||||
Received: by mail-wm1-f67.google.com with SMTP id x10so824565wmg.2
|
||||
for <linux-kernel@vger.kernel.org>;
|
||||
Fri, 08 Feb 2019 16:09:08 -0800 (PST)
|
||||
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=gmail.com; s=20161025;
|
||||
h=from:to:cc:subject:date:message-id:in-reply-to:references;
|
||||
bh=yxdwW1DyOtKem0WF782kU0A9egQwo4Qvb/PrColHLsc=;
|
||||
b=fnSxCEl/bREIP3RAd8NIp5N+R5sUUw7aoHfWroXeUgHAbdmejiO7oc5wXLAEpd6Cyp
|
||||
8XcURtp1dY/UuFEsajmGDsm1LkrPE4I1ktUNwpanSsFo2g1ULWf1wKXBOWLcQz96OHCO
|
||||
6oiWOvAOyiYggXqmUIY0QmCgVEPeHbqi2NhAxrfHPw5K2iIyg6eJdlLjheNZQe4cLR//
|
||||
H3LdjPgINUDp5Y9qXSw9RThVXi/2m4QX1NSRVkcYrMqmMrksKSnIEPmCVY2DZh+IgXpd
|
||||
74G4pIpPNLg0jSx3uYpwyCYpxjFmm6YtPJU4ZuGrEPQpoSyyUFzIWYBe5q/zMDPztB2k
|
||||
K8LA==
|
||||
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||||
d=1e100.net; s=20161025;
|
||||
h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to
|
||||
:references;
|
||||
bh=yxdwW1DyOtKem0WF782kU0A9egQwo4Qvb/PrColHLsc=;
|
||||
b=qL21kr4jTNpUZHGZD8TyHhmvC5NRGgE9y5IPFZE3B5xdL0qXg0QO1v/EaOgcJOBKxl
|
||||
IBiKPeG3mVZyegERqZ97HKpql3G9ZO5wLcJTChAYGS8nR/XkJrXsK8ZXkGoG2aVcMxtO
|
||||
lFrflsQtbHrCZZbdhgoYJAYpT9oDRWzi1I8px5OugXDFY9Bbf8zl9ASW+FS2OYDNpcIp
|
||||
8SEnQoVP+ZZrhGbni/RJWmuXZjvahkEPE4hRG9AKgtH3GjUbMZNRFqmEa34kS0hyq2g8
|
||||
6W2AzI4TqAzXXpL+uMH7eBYsTO3l5/CGqq8LcnKY6yEfIgJV3ktPHv+p97VPwPTRCt/3
|
||||
ssIA==
|
||||
X-Gm-Message-State: AHQUAub5NqVrELwrJIP8cP/Vg6X05+ZcDkdfa2wGjXecLMafbzXuXQ0T
|
||||
7htXMP3NJ7Ag3oZrUsS7nlE=
|
||||
X-Google-Smtp-Source:
|
||||
AHgI3IaZloQG5Jl9/hr4QFOoadP0GpzDuRvYrquOnSQlqZ+xi9CGKN8cYjJa7a//JZ7KkKCUdA/4mw==
|
||||
X-Received: by 2002:a7b:c4cb:: with SMTP id g11mr742497wmk.149.1549670947426;
|
||||
Fri, 08 Feb 2019 16:09:07 -0800 (PST)
|
||||
Received: from localhost.localdomain (79.108.96.12.dyn.user.ono.com.
|
||||
[79.108.96.12])
|
||||
by smtp.gmail.com with ESMTPSA id
|
||||
65sm10483171wrb.62.2019.02.08.16.09.06
|
||||
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
|
||||
Fri, 08 Feb 2019 16:09:06 -0800 (PST)
|
||||
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
To: Jessica Yu <jeyu@kernel.org>
|
||||
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
|
||||
Laura Abbott <labbott@redhat.com>,
|
||||
Martin Sebor <msebor@gcc.gnu.org>,
|
||||
Arnd Bergmann <arnd@arndb.de>,
|
||||
Masahiro Yamada <yamada.masahiro@socionext.com>,
|
||||
James Morris <james.morris@microsoft.com>,
|
||||
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
|
||||
Borislav Petkov <bp@suse.de>,
|
||||
Kees Cook <keescook@chromium.org>,
|
||||
Matt Mullins <mmullins@fb.com>,
|
||||
Vincent Whitchurch <vincent.whitchurch@axis.com>,
|
||||
WANG Chao <chao.wang@ucloud.cn>, linux-kernel@vger.kernel.org
|
||||
Subject: [PATCH 3/3] include/linux/module.h: copy __init/__exit attrs to
|
||||
init/cleanup_module
|
||||
Date: Sat, 9 Feb 2019 01:08:40 +0100
|
||||
Message-Id: <20190209000840.11018-4-miguel.ojeda.sandonis@gmail.com>
|
||||
In-Reply-To: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
References: <20190209000840.11018-1-miguel.ojeda.sandonis@gmail.com>
|
||||
Sender: linux-kernel-owner@vger.kernel.org
|
||||
Precedence: bulk
|
||||
List-ID: <linux-kernel.vger.kernel.org>
|
||||
X-Mailing-List: linux-kernel@vger.kernel.org
|
||||
|
||||
The upcoming GCC 9 release extends the -Wmissing-attributes warnings
|
||||
(enabled by -Wall) to C and aliases: it warns when particular function
|
||||
attributes are missing in the aliases but not in their target.
|
||||
|
||||
In particular, it triggers for all the init/cleanup_module
|
||||
aliases in the kernel (defined by the module_init/exit macros),
|
||||
ending up being very noisy.
|
||||
|
||||
These aliases point to the __init/__exit functions of a module,
|
||||
which are defined as __cold (among other attributes). However,
|
||||
the aliases themselves do not have the __cold attribute.
|
||||
|
||||
Since the compiler behaves differently when compiling a __cold
|
||||
function as well as when compiling paths leading to calls
|
||||
to __cold functions, the warning is trying to point out
|
||||
the possibly-forgotten attribute in the alias.
|
||||
|
||||
In order to keep the warning enabled, we decided to silence
|
||||
this case. Ideally, we would mark the aliases directly
|
||||
as __init/__exit. However, there are currently around 132 modules
|
||||
in the kernel which are missing __init/__exit in their init/cleanup
|
||||
functions (either because they are missing, or for other reasons,
|
||||
e.g. the functions being called from somewhere else); and
|
||||
a section mismatch is a hard error.
|
||||
|
||||
A conservative alternative was to mark the aliases as __cold only.
|
||||
However, since we would like to eventually enforce __init/__exit
|
||||
to be always marked, we chose to use the new __copy function
|
||||
attribute (introduced by GCC 9 as well to deal with this).
|
||||
With it, we copy the attributes used by the target functions
|
||||
into the aliases. This way, functions that were not marked
|
||||
as __init/__exit won't have their aliases marked either,
|
||||
and therefore there won't be a section mismatch.
|
||||
|
||||
Note that the warning would go away marking either the extern
|
||||
declaration, the definition, or both. However, we only mark
|
||||
the definition of the alias, since we do not want callers
|
||||
(which only see the declaration) to be compiled as if the function
|
||||
was __cold (and therefore the paths leading to those calls
|
||||
would be assumed to be unlikely).
|
||||
|
||||
Link: https://lore.kernel.org/lkml/20190123173707.GA16603@gmail.com/
|
||||
Link: https://lore.kernel.org/lkml/20190206175627.GA20399@gmail.com/
|
||||
Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
|
||||
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
|
||||
---
|
||||
include/linux/module.h | 4 ++--
|
||||
1 file changed, 2 insertions(+), 2 deletions(-)
|
||||
|
||||
diff --git a/include/linux/module.h b/include/linux/module.h
|
||||
index 8fa38d3e7538..f5bc4c046461 100644
|
||||
--- a/include/linux/module.h
|
||||
+++ b/include/linux/module.h
|
||||
@@ -129,13 +129,13 @@ extern void cleanup_module(void);
|
||||
#define module_init(initfn) \
|
||||
static inline initcall_t __maybe_unused __inittest(void) \
|
||||
{ return initfn; } \
|
||||
- int init_module(void) __attribute__((alias(#initfn)));
|
||||
+ int init_module(void) __copy(initfn) __attribute__((alias(#initfn)));
|
||||
|
||||
/* This is only required if you want to be unloadable. */
|
||||
#define module_exit(exitfn) \
|
||||
static inline exitcall_t __maybe_unused __exittest(void) \
|
||||
{ return exitfn; } \
|
||||
- void cleanup_module(void) __attribute__((alias(#exitfn)));
|
||||
+ void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn)));
|
||||
|
||||
#endif
|
||||
|
||||
@ -164,18 +164,18 @@ index 100ce4a4aff6..62361b647a75 100644
|
||||
|
||||
#ifdef CONFIG_EFI
|
||||
/*
|
||||
@@ -1169,6 +1177,8 @@ extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
|
||||
@@ -1198,6 +1206,8 @@ static inline bool efi_enabled(int feature)
|
||||
extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
|
||||
|
||||
extern bool efi_is_table_address(unsigned long phys_addr);
|
||||
|
||||
extern int efi_apply_persistent_mem_reservations(void);
|
||||
+
|
||||
+extern void __init efi_set_secure_boot(enum efi_secureboot_mode mode);
|
||||
#else
|
||||
static inline bool efi_enabled(int feature)
|
||||
{
|
||||
@@ -1192,6 +1202,8 @@ static inline int efi_apply_persistent_mem_reservations(void)
|
||||
@@ -1216,6 +1226,8 @@ static inline bool efi_is_table_address(unsigned long phys_addr)
|
||||
{
|
||||
return 0;
|
||||
return false;
|
||||
}
|
||||
+
|
||||
+static inline void efi_set_secure_boot(enum efi_secureboot_mode mode) {}
|
||||
|
||||
13
kernel.spec
13
kernel.spec
@ -69,9 +69,9 @@ Summary: The Linux kernel
|
||||
# Work around for major version bump
|
||||
%define upstream_sublevel 0
|
||||
# The rc snapshot level
|
||||
%global rcrev 6
|
||||
%global rcrev 7
|
||||
# The git snapshot level
|
||||
%define gitrev 1
|
||||
%define gitrev 0
|
||||
# Set rpm version accordingly
|
||||
%define rpmversion 5.%{upstream_sublevel}.0
|
||||
%endif
|
||||
@ -124,7 +124,7 @@ Summary: The Linux kernel
|
||||
# Set debugbuildsenabled to 1 for production (build separate debug kernels)
|
||||
# and 0 for rawhide (all kernels are debug kernels).
|
||||
# See also 'make debug' and 'make release'.
|
||||
%define debugbuildsenabled 0
|
||||
%define debugbuildsenabled 1
|
||||
|
||||
# Kernel headers are being split out into a separate package
|
||||
%if 0%{?fedora}
|
||||
@ -428,7 +428,7 @@ BuildRequires: binutils-%{_build_arch}-linux-gnu, gcc-%{_build_arch}-linux-gnu
|
||||
%endif
|
||||
|
||||
# Source0: https://www.kernel.org/pub/linux/kernel/v5.x/linux-%{kversion}.tar.xz
|
||||
Source0: https://git.kernel.org/torvalds/t/linux-5.0-rc6.tar.gz
|
||||
Source0: https://git.kernel.org/torvalds/t/linux-5.0-rc7.tar.gz
|
||||
|
||||
Source11: x509.genkey
|
||||
Source12: remove-binary-diff.pl
|
||||
@ -602,7 +602,6 @@ Patch501: input-rmi4-remove-the-need-for-artifical-IRQ.patch
|
||||
Patch504: efi-use-32-bit-alignment-for-efi_guid_t.patch
|
||||
|
||||
# gcc9 fixes
|
||||
Patch505: Clean-the-new-GCC-9--Wmissing-attributes-warnings.patch
|
||||
Patch506: 0001-s390-jump_label-Correct-asm-contraint.patch
|
||||
Patch507: 0001-Drop-that-for-now.patch
|
||||
|
||||
@ -1887,6 +1886,10 @@ fi
|
||||
#
|
||||
#
|
||||
%changelog
|
||||
* Mon Feb 18 2019 Laura Abbott <labbott@redhat.com> - 5.0.0-0.rc7.git0.1
|
||||
- Linux v5.0-rc7
|
||||
- Disable debugging options.
|
||||
|
||||
* Wed Feb 13 2019 Laura Abbott <labbott@redhat.com> - 5.0.0-0.rc6.git1.1
|
||||
- Linux v5.0-rc6-42-g1f947a7a011f
|
||||
|
||||
|
||||
3
sources
3
sources
@ -1,2 +1 @@
|
||||
SHA512 (linux-5.0-rc6.tar.gz) = de3d6acf9282cfa831e87994df9c2cc855b43cd2638a6417888098e3ce54384780e67c8de0ca6a9163950808012bc4de28740e61c00d3337506d76da840d6ff5
|
||||
SHA512 (patch-5.0-rc6-git1.xz) = be4d6c6b19d529e93585750286d07e32a555db09fc481b4d39f2b59bf34ba1df504bdb6b89a67522a66741b099bd5a5d99742ec167d6e706f07963cefbc7cbbc
|
||||
SHA512 (linux-5.0-rc7.tar.gz) = 4458043fcaf85cbbe5155a46267bebb505575e954babe4525c0a3e5d3515f97d2774487f71617792490eb01d83ae710fd33c454ac636978d6fcd3c1e77dad2f7
|
||||
|
||||
Loading…
Reference in New Issue
Block a user