Add new device oneplus-onyx (Oneplus X) (#856)

device/device-oneplus-onyx/90-android-touch-dev.rules

@@ -0,0 +1,3 @@
+# udev rules file
+SUBSYSTEM=="input", ATTRS{name}=="synaptics-rmi", \
+ENV{ID_INPUT}="1", ENV{ID_INPUT_TOUCHSCREEN}="1"

device/device-oneplus-onyx/APKBUILD

@@ -0,0 +1,26 @@
+pkgname=device-oneplus-onyx
+pkgver=1
+pkgrel=0
+pkgdesc="OnePlus X"
+url="https://github.com/postmarketOS"
+arch="noarch"
+license="MIT"
+depends="linux-oneplus-onyx linux-firmware mkbootimg msm-fb-refresher"
+makedepends=""
+install=""
+source="deviceinfo 90-android-touch-dev.rules fb.modes"
+options="!check"
+
+package() {
+	install -Dm644 "$srcdir"/deviceinfo \
+		"$pkgdir"/etc/deviceinfo
+	install -Dm644 "$srcdir"/90-android-touch-dev.rules \
+		"$pkgdir"/etc/udev/rules.d/90-android-touch-dev.rules
+	install -Dm644 "$srcdir"/fb.modes \
+		"$pkgdir"/etc/fb.modes
+
+}
+
+sha512sums="73d7778d8e34c65b0ef04c4d0931af3280dee9ac5bb70941313d666a7ccea71a3c250db110c5203a37d1597681c0cbcbb0adba455934be3a7bdebbcb544a8f18  deviceinfo
+73963817cab7b798642f91894eb17975212a323d0e8bf8ce4f477fe33ace90b0050180877cbb605a074d07871d640c654cd581f0359532b9edb072013e6346a5  90-android-touch-dev.rules
+1452360bab1146643d8c6e0c881bfc145030cd5e3704765fc17f701dcec3f3e890a93db77e1b6afd6884d48b790e7dfc1013bbeedd619ae798baccaeab118847  fb.modes"

device/device-oneplus-onyx/deviceinfo

@@ -0,0 +1,37 @@
+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="OnePlus X"
+deviceinfo_manufacturer="OnePlus"
+deviceinfo_date=""
+deviceinfo_keyboard="false"
+deviceinfo_nonfree="????"
+deviceinfo_dtb=""
+deviceinfo_modules_initfs=""
+deviceinfo_external_disk="false"
+deviceinfo_external_disk_install="false"
+deviceinfo_flash_methods="fastboot"
+deviceinfo_arch="armhf"
+
+# Splash screen
+deviceinfo_screen_width="1080"
+deviceinfo_screen_height="1920"
+
+deviceinfo_msm_refresher="true"
+
+# Fastboot related
+deviceinfo_generate_bootimg="true"
+deviceinfo_bootimg_qcdt="true"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x01000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x00000100"
+deviceinfo_flash_offset_base="0"
+deviceinfo_flash_pagesize="2048"
+deviceinfo_kernel_cmdline="console=ttyHSL0,115200,n8 androidboot.hardware=qcom user_debug=23 msm_rtb.filter=0x3b7 ehci-hcd.park=3 androidboot.bootdevice=msm_sdcc.1"
+
+deviceinfo_dev_touchscreen="/dev/input/event1"
+
+# Weston red screen workaround (see issue #54)
+deviceinfo_weston_pixman_type="2"

device/device-oneplus-onyx/fb.modes

@@ -0,0 +1,7 @@
+mode "1080x1920-0"
+        # D: 1.109 MHz, H: 0.860 kHz, V: 0.442 Hz
+        geometry 1080 1920 1080 1920 16
+        timings 902093 70 120 4 18 19 2
+        accel false
+        rgba 8/24,8/16,8/8,8/0
+endmode

device/linux-oneplus-onyx/00_Input-lifebook-use-static-inline-instead-of-inline-i.patch

@@ -0,0 +1,46 @@
+From bd447b61c49fc26f0299587db3e6d66da49dc529 Mon Sep 17 00:00:00 2001
+From: Chen Gang <gang.chen.5i5j@gmail.com>
+Date: Sun, 9 Nov 2014 13:31:11 -0800
+Subject: [PATCH] Input: lifebook - use "static inline" instead of "inline" in
+ lifebook.h
+
+For functions defined in header files we should use static inline rather
+than inline, which breaks under the latest upstream gcc (which is really
+gcc issue, but static inline is better suited regardless).
+
+The related error (with allmodconfig under tile):
+
+    MODPOST 4002 modules
+  ERROR: "lifebook_detect" [drivers/input/mouse/psmouse.ko] undefined!
+
+Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
+Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+---
+ drivers/input/mouse/lifebook.h | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/input/mouse/lifebook.h b/drivers/input/mouse/lifebook.h
+index 4c4326c6f504..0baf02a70a99 100644
+--- a/drivers/input/mouse/lifebook.h
++++ b/drivers/input/mouse/lifebook.h
+@@ -16,14 +16,14 @@ void lifebook_module_init(void);
+ int lifebook_detect(struct psmouse *psmouse, bool set_properties);
+ int lifebook_init(struct psmouse *psmouse);
+ #else
+-inline void lifebook_module_init(void)
++static inline void lifebook_module_init(void)
+ {
+ }
+-inline int lifebook_detect(struct psmouse *psmouse, bool set_properties)
++static inline int lifebook_detect(struct psmouse *psmouse, bool set_properties)
+ {
+ 	return -ENOSYS;
+ }
+-inline int lifebook_init(struct psmouse *psmouse)
++static inline int lifebook_init(struct psmouse *psmouse)
+ {
+ 	return -ENOSYS;
+ }
+-- 
+2.14.1
+

device/linux-oneplus-onyx/00_Input-sentelic-use-static-inline-instead-of-inline.patch

@@ -0,0 +1,36 @@
+From bde304575f3ecaa9570a9329196dffaadf3adafa Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 22 May 2015 09:56:29 -0700
+Subject: [PATCH] Input: sentelic - use "static inline" instead of "inline"
+
+gcc-5 defaults to gnu11 which used c99 inline semantics in c99 'inline' is
+not externally visible unlike gnu89, therefore we use 'static inline' which
+has same semantics between gnu89 and c99
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+---
+ drivers/input/mouse/sentelic.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/input/mouse/sentelic.h b/drivers/input/mouse/sentelic.h
+index aa697ece405b..42df9e3beae8 100644
+--- a/drivers/input/mouse/sentelic.h
++++ b/drivers/input/mouse/sentelic.h
+@@ -123,11 +123,11 @@ struct fsp_data {
+ extern int fsp_detect(struct psmouse *psmouse, bool set_properties);
+ extern int fsp_init(struct psmouse *psmouse);
+ #else
+-inline int fsp_detect(struct psmouse *psmouse, bool set_properties)
++static inline int fsp_detect(struct psmouse *psmouse, bool set_properties)
+ {
+ 	return -ENOSYS;
+ }
+-inline int fsp_init(struct psmouse *psmouse)
++static inline int fsp_init(struct psmouse *psmouse)
+ {
+ 	return -ENOSYS;
+ }
+-- 
+2.14.1
+

device/linux-oneplus-onyx/00_dontpanic.patch

@@ -0,0 +1,74 @@
+diff --git a/arch/arm/mach-msm/restart.c b/arch/arm/mach-msm/restart.c
+index ab211fb0009..61ac4160949 100755
+--- a/arch/arm/mach-msm/restart.c
++++ b/arch/arm/mach-msm/restart.c
+@@ -452,7 +452,9 @@ void msm_restart(char mode, const char *cmd)
+         mdelay(1000);
+     }*/
+ #endif /* VENDOR_EDIT*/
+-
++	pr_info("%s : flush console and then delay 1s waiting log printing", __func__);
++	arm_machine_flush_console();
++	mdelay(1000);
+ 	if (!use_restart_v2()) {
+ 		__raw_writel(0, msm_tmr0_base + WDT0_EN);
+ 		if (!(machine_is_msm8x60_fusion() ||
+diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
+index 2e1f3adbbe8..9a81afad423 100644
+--- a/drivers/input/keyboard/gpio_keys.c
++++ b/drivers/input/keyboard/gpio_keys.c
+@@ -30,10 +30,10 @@
+ #include <linux/of_gpio.h>
+ #include <linux/spinlock.h>
+ 
+-#ifdef VENDOR_EDIT
++//#ifdef VENDOR_EDIT
+ //hefaxi@filesystems, 2015/07/03, add for force dump function
+-#include <linux/oem_force_dump.h>
+-#endif
++//#include <linux/oem_force_dump.h>
++//#endif
+ 
+ struct gpio_button_data {
+ 	const struct gpio_keys_button *button;
+@@ -338,7 +338,7 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
+ 
+ #ifdef VENDOR_EDIT
+ //hefaxi@filesystems, 2015/07/03, add for force dump function
+-    oem_check_force_dump_key(button->code,state);
++    //oem_check_force_dump_key(button->code,state);
+ #endif
+ 
+ 	if (type == EV_ABS) {
+diff --git a/drivers/platform/msm/qpnp-power-on.c b/drivers/platform/msm/qpnp-power-on.c
+index c6aae05a514..1de7f84fd01 100755
+--- a/drivers/platform/msm/qpnp-power-on.c
++++ b/drivers/platform/msm/qpnp-power-on.c
+@@ -24,10 +24,10 @@
+ #include <linux/log2.h>
+ #include <linux/qpnp/power-on.h>
+ 
+-#ifdef VENDOR_EDIT
++//#ifdef VENDOR_EDIT
+ //hefaxi@filesystems, 2015/07/03, add for force dump function
+-#include <linux/oem_force_dump.h>
+-#endif
++//#include <linux/oem_force_dump.h>
++//#endif
+ 
+ #define PMIC_VER_8941           0x01
+ #define PMIC_VERSION_REG        0x0105
+@@ -438,10 +438,10 @@ qpnp_pon_input_dispatch(struct qpnp_pon *pon, u32 pon_type)
+ 					(pon_rt_sts & pon_rt_bit));
+ 	input_sync(pon->pon_input);
+ 
+-#ifdef VENDOR_EDIT
++//#ifdef VENDOR_EDIT
+ //hefaxi@filesystems, 2015/07/03, add for force dump function
+-    oem_check_force_dump_key(cfg->key_code,(pon_rt_sts & pon_rt_bit));
+-#endif
++    //oem_check_force_dump_key(cfg->key_code,(pon_rt_sts & pon_rt_bit));
++//#endif
+ 	return 0;
+ }
+ 

device/linux-oneplus-onyx/00_fix_return_address.patch

@@ -0,0 +1,49 @@
+From aeea3592a13bf12861943e44fc48f1f270941f8d Mon Sep 17 00:00:00 2001
+From: Behan Webster <behanw@converseincode.com>
+Date: Wed, 24 Sep 2014 01:06:46 +0100
+Subject: [PATCH] ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h
+
+With compilers which follow the C99 standard (like modern versions of gcc and
+clang), "extern inline" does the wrong thing (emits code for an externally
+linkable version of the inline function). In this case using static inline
+and removing the NULL version of return_address in return_address.c does
+the right thing.
+
+Signed-off-by: Behan Webster <behanw@converseincode.com>
+Reviewed-by: Mark Charlebois <charlebm@gmail.com>
+Acked-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ arch/arm/include/asm/ftrace.h    | 2 +-
+ arch/arm/kernel/return_address.c | 5 -----
+ 2 files changed, 1 insertion(+), 6 deletions(-)
+
+diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
+index 39eb16b0066f2..bfe2a2f5a644e 100644
+--- a/arch/arm/include/asm/ftrace.h
++++ b/arch/arm/include/asm/ftrace.h
+@@ -45,7 +45,7 @@ void *return_address(unsigned int);
+ 
+ #else
+ 
+-extern inline void *return_address(unsigned int level)
++static inline void *return_address(unsigned int level)
+ {
+ 	return NULL;
+ }
+diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
+index fafedd86885dd..f6aa84d5b93c9 100644
+--- a/arch/arm/kernel/return_address.c
++++ b/arch/arm/kernel/return_address.c
+@@ -63,11 +63,6 @@ void *return_address(unsigned int level)
+ #warning "TODO: return_address should use unwind tables"
+ #endif
+ 
+-void *return_address(unsigned int level)
+-{
+-	return NULL;
+-}
+-
+ #endif /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) / else */
+ 
+ EXPORT_SYMBOL_GPL(return_address);

device/linux-oneplus-onyx/00_mt_width_major_params.patch

@@ -0,0 +1,12 @@
+diff --git a/drivers/input/touchscreen/synaptics_driver_s3508.c b/drivers/input/touchscreen/synaptics_driver_s3508.c
+index dfc8927b656..8ed66423ef6 100644
+--- a/drivers/input/touchscreen/synaptics_driver_s3508.c
++++ b/drivers/input/touchscreen/synaptics_driver_s3508.c
+@@ -3475,6 +3475,7 @@ static int	synaptics_input_init(struct synaptics_ts_data *ts)
+ #endif
+ 
+ 	/* For multi touch */
++	input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 16, 0, 0);
+ 	input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ 		input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
+ 		input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);

device/linux-oneplus-onyx/02_gpu-msm-fix-gcc5-compile.patch

@@ -0,0 +1,33 @@
+source:
+https://github.com/ShinySide/HispAsian_Lollipop_G6/commit/b7756b6fc4bb728722b14d2dfdbaf1dc843812e9
+
+* These need to be static to avoid these errors:
+
+drivers/built-in.o: In function `.LANCHOR1':
+msm_iommu_sec.c:(.data+0x9298): undefined reference to `kgsl_iommu_sync_lock'
+msm_iommu_sec.c:(.data+0x929c): undefined reference to `kgsl_iommu_sync_unlock'
+Makefile:877: recipe for target '.tmp_vmlinux1' failed
+make: *** [.tmp_vmlinux1] Error 1
+
+Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
+
+--- a/drivers/gpu/msm/kgsl_iommu.c
++++ b/drivers/gpu/msm/kgsl_iommu.c
+@@ -1010,7 +1010,7 @@ static int kgsl_iommu_init_sync_lock(struct kgsl_mmu *mmu)
+  *
+  * Return - int - number of commands.
+  */
+-inline unsigned int kgsl_iommu_sync_lock(struct kgsl_mmu *mmu,
++static inline unsigned int kgsl_iommu_sync_lock(struct kgsl_mmu *mmu,
+ 						unsigned int *cmds)
+ {
+ 	struct kgsl_device *device = mmu->device;
+@@ -1080,7 +1080,7 @@ inline unsigned int kgsl_iommu_sync_lock(struct kgsl_mmu *mmu,
+  *
+  * Return - int - number of commands.
+  */
+-inline unsigned int kgsl_iommu_sync_unlock(struct kgsl_mmu *mmu,
++static inline unsigned int kgsl_iommu_sync_unlock(struct kgsl_mmu *mmu,
+ 					unsigned int *cmds)
+ {
+ 	struct kgsl_device *device = mmu->device;

device/linux-oneplus-onyx/APKBUILD

@@ -0,0 +1,134 @@
+#****
+# This kernel doesn't work properly!
+# The kernel will panic whenever you attempt to use the framebuffer (and probably other things).
+# Note that this seems to be a gcc6/pmOS toolchain issue - as applying 00_mt_width_major_params.patch and using 
+# config-oneplus-onyx.armhf with this kernel source in the Lineage toolchain will build & work fine.
+# See https://github.com/postmarketOS/pmbootstrap/issues/848.
+#****
+
+
+# APKBUILD based on linux-oneplus-bacon aport (devices are closely related). Changes:
+# - add extra patches to support GCC 6
+# - Add 00_dontpanic.patch to prevent device from entering a download mode upon panic (reboot instead). CONFIG_MSM_DLOAD_MODE was also disabled.
+# - 00_mt_width_major_params.patch - Fixes touchscreen being rejected by libinput/weston because of params not being set.
+# - 
+#
+# Kernel config based on: arch/arm/configs/lineageos_onyx_defconfig
+# Changes:
+# - Enable devtempfs
+# - Disable MSM 3d graphics driver (MSM_KGSL).
+# - Enable Virtual Terminal
+# - Disable ANDROID_PARANOID_NETWORK
+# - Enable SYSVIPC.
+
+_vendor=oneplus
+_flavor=oneplus-onyx
+_version="c83d4835d228f8330da7e33846eec33c64608349"
+_config="config-${_flavor}.armhf"
+
+pkgname=linux-${_flavor}
+pkgver=3.4.0
+case $pkgver in
+	*.*.*) _kernver=${pkgver%.*};;
+	*.*) _kernver=$pkgver;;
+esac
+pkgrel=0
+arch="armhf"
+pkgdesc="LineageOS 14.1 kernel for OnePlus X (onyx)"
+url="https://github.com/LineageOS/android_kernel_oneplus_onyx"
+depends="postmarketos-mkinitfs"
+makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev python2 xz dtbtool"
+options="!strip !check !tracedeps"
+install=
+source="
+	$pkgname-$_version.tar.gz::https://github.com/LineageOS/android_kernel_oneplus_onyx/archive/${_version}.tar.gz
+	${_config}
+	compiler-gcc6.h
+	00_dontpanic.patch
+	00_fix_return_address.patch
+	00_mt_width_major_params.patch
+	00_Input-sentelic-use-static-inline-instead-of-inline.patch
+	00_Input-lifebook-use-static-inline-instead-of-inline-i.patch
+	02_gpu-msm-fix-gcc5-compile.patch
+"
+subpackages=""
+license="GPL2"
+
+_abi_release=${pkgver}
+_carch="arm"
+HOSTCC="${CC:-gcc}"
+HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
+
+ksrcdir="$srcdir/android_kernel_oneplus_onyx-${_version}"
+
+prepare() {
+	local _patch_failed=
+	cd "$ksrcdir"
+
+	# first apply patches in specified order
+	for i in $source; do
+		case $i in
+		*.patch)
+			msg "Applying $i..."
+			if ! patch -s -p1 -N -i "$srcdir"/$i; then
+				echo $i >>failed
+				_patch_failed=1
+			fi
+			;;
+		esac
+	done
+
+	if ! [ -z "$_patch_failed" ]; then
+		error "The following patches failed:"
+		cat failed
+		return 1
+	fi
+
+	# gcc6 support
+	cp -v "$srcdir"/compiler-gcc6.h "$ksrcdir"/include/linux/
+	mkdir -p "$srcdir"/build
+	cp "$srcdir"/$_config "$srcdir"/build/.config
+
+	echo "--[ silentoldconfig ]--"
+	yes "" | make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
+		oldconfig
+}
+
+# this is so we can do `abuild menuconfig` to reconfigure kernel
+menuconfig() {
+	cd "$srcdir"/build
+
+	echo "--[ menuconfig ]--"
+	make ARCH="$_carch" menuconfig
+	cp .config "$startdir"/$_config
+}
+
+build() {
+	cd "$srcdir"/build
+	unset LDFLAGS
+	make ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1))-Alpine" CONFIG_NO_ERROR_ON_MISMATCH=y
+
+}
+
+package() {
+	install -Dm644 "$srcdir"/build/arch/arm/boot/zImage-dtb \
+		"$pkgdir"/boot/vmlinuz-$_flavor
+
+	install -D "$srcdir"/build/include/config/kernel.release \
+		"$pkgdir"/usr/share/kernel/$_flavor/kernel.release
+
+	cd "$srcdir"/build
+	unset LDFLAGS
+
+}
+
+sha512sums="32557bab4b1526179fcd2303c836dfcf65afcd3172cf1c158cfa13d3a6bd958d55845d4f555510fe85885fc10e93efbbc405a9a741d4f5e2ce15466093159e24  linux-oneplus-onyx-c83d4835d228f8330da7e33846eec33c64608349.tar.gz
+dfd6ae95d814e11713e95e4eec50e25e33477c892fbd84394d8239aae127cdad9e275183ab642f80ba7b0aca975e11c6c2582607a22c0bcfb0aa63db4ec7a838  config-oneplus-onyx.armhf
+22031601ef1c5655232096d06c36ede0d7d92fa5e09e27d7a739f9be1021eb400e9811405fd51a0eee8a71faddaf46cfac7b33d8c161f4c7e1a2b7c495840dce  compiler-gcc6.h
+4930be0f01cb771c63c9464ec34fb738e9ebe3872a626841908eb026adc29aba19799d5d1374730e8130a0d755796d08c9002d1369c3a94b44ee5117a16ac586  00_dontpanic.patch
+ea1d3b5a234fa565e3c1a792de48f4fc4e6023d281d303c8e319c7ef28edc5739ab0e4dea0139a41f0a5c7d03e27921ccaa214fd0ac5c72245a094ce60128864  00_fix_return_address.patch
+35f4ef7f1c7fbda31224741126416c805736bd0ea6157eb1048ba53cdf68ea2221776686cd5b956bff91e6a64bef809a52db3d3152f5c3cfe11ded9a5caec98d  00_mt_width_major_params.patch
+2d77d90b501aa8afbf81629e73fc0a2055b373942975f58277e43f398d0835b3dbbff4a1118137ec82873ba90a254fea87c1d73ba7708578f1779bd0b4c6ff2d  00_Input-sentelic-use-static-inline-instead-of-inline.patch
+5c49f6ff6773a7dc3067d2b1359648fe7a9f758b6c068d6fa69d9aaf24a291ba8022c960317d926aabc11d020a71b20c4e81a6fcf9b21ef66d9b6d065bae23e9  00_Input-lifebook-use-static-inline-instead-of-inline-i.patch
+7be03a9e78b7ac330a54b1f00509caa0621a95c0c55901878ad757f9dd69cc05ba2c8b5ea987063ae1224f92c4d090d515fa5d369e7755181a4871b0d0f82881  02_gpu-msm-fix-gcc5-compile.patch"

device/linux-oneplus-onyx/compiler-gcc6.h

@@ -0,0 +1,69 @@
+// SOURCE:
+// https://github.com/NextThingCo/CHIP-u-boot/issues/10#issuecomment-287515505
+
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
+#endif
+
+#define __used				__attribute__((__used__))
+#define __must_check			__attribute__((warn_unused_result))
+#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
+//#error "gcc6"
+/* Mark functions as cold. gcc will assume any path leading to a call
+   to them will be unlikely.  This means a lot of manual unlikely()s
+   are unnecessary now for any paths leading to the usual suspects
+   like BUG(), printk(), panic() etc. [but let's keep them for now for
+   older compilers]
+
+   Early snapshots of gcc 4.3 don't support this and we can't detect this
+   in the preprocessor, but we can live with this because they're unreleased.
+   Maketime probing would be overkill here.
+
+   gcc also has a __attribute__((__hot__)) to move hot functions into
+   a special section, but I don't see any sense in this right now in
+   the kernel context */
+#define __cold			__attribute__((__cold__))
+
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+#ifndef __CHECKER__
+# define __compiletime_warning(message) __attribute__((warning(message)))
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* __CHECKER__ */
+
+/*
+ * Mark a position in code as unreachable.  This can be used to
+ * suppress control flow warnings after asm blocks that transfer
+ * control elsewhere.
+ *
+ * Early snapshots of gcc 4.5 don't support this and we can't detect
+ * this in the preprocessor, but we can live with this because they're
+ * unreleased.  Really, we need to have autoconf for the kernel.
+ */
+#define unreachable() __builtin_unreachable()
+
+/* Mark a function definition as prohibited from being cloned. */
+#define __noclone	__attribute__((__noclone__))
+
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+
+/*
+ * GCC 'asm goto' miscompiles certain code sequences:
+ *
+ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
+ *
+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
+ *
+ * (asm goto is automatically volatile - the naming reflects this.)
+ */
+#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
+
+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
+#define __HAVE_BUILTIN_BSWAP32__
+#define __HAVE_BUILTIN_BSWAP64__
+#define __HAVE_BUILTIN_BSWAP16__
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+