From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Adrian Hunter <adrian.hunter@intel.com>,
David Ahern <dsahern@gmail.com>, Jiri Olsa <jolsa@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Wang Nan <wangnan0@huawei.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 4.9 16/29] tools include: Adopt __same_type() and __must_be_array() from the kernel
Date: Mon, 4 Jun 2018 08:58:12 +0200 [thread overview]
Message-ID: <20180604065802.791930898@linuxfoundation.org> (raw)
In-Reply-To: <20180604065802.157744637@linuxfoundation.org>
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnaldo Carvalho de Melo <acme@redhat.com>
commit f6441aff8946f7fd6ab730d7eb9eba18a9ebeba4 upstream.
Will be used to adopt the more stringent version of ARRAY_SIZE(), the
one in the kernel sources.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-d85dpvay1hoqscpezlntyd8x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/include/linux/compiler-gcc.h | 3 +++
tools/include/linux/compiler.h | 5 +++++
2 files changed, 8 insertions(+)
--- a/tools/include/linux/compiler-gcc.h
+++ b/tools/include/linux/compiler-gcc.h
@@ -16,3 +16,6 @@
#if GCC_VERSION >= 40300
# define __compiletime_error(message) __attribute__((error(message)))
#endif /* GCC_VERSION >= 40300 */
+
+/* &a[0] degrades to a pointer: a different type from an array */
+#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -17,6 +17,11 @@
# define __always_inline inline __attribute__((always_inline))
#endif
+/* Are two types/vars the same type (ignoring qualifiers)? */
+#ifndef __same_type
+# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
+#endif
+
#ifdef __ANDROID__
/*
* FIXME: Big hammer to get rid of tons of:
next prev parent reply other threads:[~2018-06-04 6:59 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-04 6:57 [PATCH 4.9 00/29] 4.9.106-stable review Greg Kroah-Hartman
2018-06-04 6:57 ` [PATCH 4.9 01/29] objtool: Improve detection of BUG() and other dead ends Greg Kroah-Hartman
2018-06-04 6:57 ` [PATCH 4.9 02/29] objtool: Move checking code to check.c Greg Kroah-Hartman
2018-06-04 6:57 ` [PATCH 4.9 03/29] tools lib: Add for_each_clear_bit macro Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 04/29] tools: add more bitmap functions Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 05/29] tools: enable endian checks for all sparse builds Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 06/29] tools include: Introduce linux/compiler-gcc.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 07/29] radix tree test suite: Remove types.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 08/29] tools include: Adopt __compiletime_error Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 09/29] tools include: Introduce atomic_cmpxchg_{relaxed,release}() Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 10/29] tools include: Add UINT_MAX def to kernel.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 11/29] tools include: Adopt kernels refcount.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 12/29] perf tools: Force fixdep compilation at the start of the build Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 13/29] perf tools: Move headers check into bash script Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 14/29] tools include uapi: Grab copies of stat.h and fcntl.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 15/29] tools include: Introduce linux/bug.h, from the kernel sources Greg Kroah-Hartman
2018-06-04 6:58 ` Greg Kroah-Hartman [this message]
2018-06-04 6:58 ` [PATCH 4.9 17/29] tools include: Move ARRAY_SIZE() to linux/kernel.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 18/29] tools include: Drop ARRAY_SIZE() definition from linux/hashtable.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 19/29] tools include: Include missing headers for fls() and types in linux/log2.h Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 20/29] objtool: sync up with the 4.14.47 version of objtool Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 21/29] objtool: Support GCC 8s cold subfunctions Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 22/29] objtool: Support GCC 8 switch tables Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 23/29] objtool: Detect RIP-relative switch table references Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 24/29] objtool: Detect RIP-relative switch table references, part 2 Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 25/29] objtool: Fix "noreturn" detection for recursive sibling calls Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 26/29] objtool, x86: Add several functions and files to the objtool whitelist Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 27/29] perf/tools: header file sync up Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 28/29] objtool: header file sync-up Greg Kroah-Hartman
2018-06-04 6:58 ` [PATCH 4.9 29/29] x86/xen: Add unwind hint annotations to xen_setup_gdt Greg Kroah-Hartman
2018-06-04 10:15 ` [PATCH 4.9 00/29] 4.9.106-stable review Guenter Roeck
2018-06-04 11:27 ` Greg Kroah-Hartman
2018-06-04 12:21 ` Greg Kroah-Hartman
2018-06-04 16:16 ` Guenter Roeck
2018-06-04 16:54 ` Guenter Roeck
2018-06-04 16:57 ` Greg Kroah-Hartman
2018-06-04 17:04 ` Guenter Roeck
2018-06-04 16:58 ` Greg Kroah-Hartman
2018-06-04 19:46 ` Shuah Khan
2018-06-05 6:14 ` Naresh Kamboju
[not found] ` <5b152b7c.1c69fb81.3f04a.096f@mx.google.com>
[not found] ` <7hr2lmjgcd.fsf@baylibre.com>
2018-06-05 10:51 ` Mark Brown
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