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Ian Munsie 2cd55c68c0 cxl: Fix build failure due to -Wunused-variable behaviour change 
A recent change in gcc caused this build failure:

/var/lib/jenkins/workspace/gcc_kernel_build/linux/drivers/misc/cxl/cxl.h:72:27:
error: ‘CXL_PSL_DLCNTL’ defined but not used [-Werror=unused-const-variable]
 static const cxl_p1_reg_t CXL_PSL_DLCNTL  = {0x0060};

Because of this gcc commit:

Commit 1bca8cbd0c68366f07277f98ce6963e10c2aa617 by mark
PR28901 -Wunused-variable ignores unused const initialised variables in C
12 years ago it was decided that -Wunused-variable shouldn't warn about
static const variables because some code used const static char rcsid[]
strings which were never used but wanted in the code anyway. But as the
bug points out this hides some real bugs. These days the usage of
rcsids is not very popular anymore. So this patch changes the default
to warn about unused static const variables in C with
-Wunused-variable. And it adds a new option -Wno-unused-const-variable
to turn this warning off. For C++ this new warning is off by default,
since const variables can be used as #defines in C++. New testcases for
the new defaults in C and C++ are included testing the new warning and
suppressing it with an unused attribute or using
-Wno-unused-const-variable. gcc/ChangeLog

The cxl driver uses static consts in place of #defines in some cases
for type safety, so this change causes the driver to fail to build on
new copilers as these constants are not all used in every file that
imports the header. Suppress the warning for this driver to return to
the old behaviour of -Wunused-variable.

Reported-by: Anton Blanchard <anton@au1.ibm.com>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2015-09-15 19:33:51 +10:00
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accessibility
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acpi Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
amba
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android
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ata Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
atm
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auxdisplay
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base Merge branch 'akpm' (patches from Andrew) 2015-09-05 14:27:38 -07:00
bcma
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block Merge branch 'for-4.3/drivers' of git://git.kernel.dk/linux-block 2015-09-02 13:14:58 -07:00
bluetooth Bluetooth: hci_bcm: Fix crash on suspend 2015-08-28 21:09:14 +02:00
bus MIPS: Remove "weak" from mips_cdmm_phys_base() declaration 2015-09-03 12:07:39 +02:00
cdrom
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char Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
clk This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00
clocksource - New Device Support 2015-09-04 11:35:03 -07:00
connector
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cpufreq Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
cpuidle Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
crypto Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
dca
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devfreq
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dio
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dma dmaengine updates for 4.3-rc1 2015-09-04 11:10:18 -07:00
dma-buf
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edac Minor stuff: AMD MCE decoding correction and xgene_edac cleanup. 2015-09-01 18:34:22 -07:00
eisa
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extcon regulator: Updates for v4.3 2015-08-31 15:49:19 -07:00
firewire
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firmware Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
fmc
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gpio Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
gpu Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
hsi
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hv
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hwmon hwmon: (fam15h_power) Add ratio of Tsample to the PTSC period 2015-08-27 07:53:19 -07:00
hwspinlock
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hwtracing/coresight
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i2c - New Device Support 2015-09-04 11:35:03 -07:00
ide
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idle
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iio This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-08-21 11:44:04 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
iommu Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
ipack
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irqchip Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-09-03 08:08:17 -07:00
leds - Stop using LP855X Platform Data to control regulators 2015-09-04 11:40:40 -07:00
lguest
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macintosh powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2015-09-05 18:11:04 -07:00
mcb
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md md updates for 4.3 2015-09-05 17:52:22 -07:00
media media updates for v4.3-rc1 2015-09-05 18:21:14 -07:00
memory powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
memstick
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message mptfusion: prevent some memory corruption 2015-08-26 07:11:45 -07:00
mfd Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-09-04 15:49:32 -07:00
misc cxl: Fix build failure due to -Wunused-variable behaviour change 2015-09-15 19:33:51 +10:00
mmc Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
mtd powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
net Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
nfc This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
ntb
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nubus
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nvdimm Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block 2015-09-02 13:10:25 -07:00
nvmem
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of arm64 updates for 4.3: 2015-09-04 07:18:09 -07:00
oprofile
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parisc Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
parport
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pci Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
pcmcia pcmcia: soc_common: remove skt_dev_info's clk pointer 2015-09-03 16:01:03 +01:00
perf
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phy This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
pinctrl This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00
platform Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
pnp
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power Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
powercap powercap / RAPL: disable the 2nd power limit properly 2015-08-29 01:46:40 +02:00
pps
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ps3
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ptp
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pwm
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rapidio
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ras
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regulator Merge remote-tracking branch 'regulator/topic/tps6586x' into regulator-next 2015-08-30 14:40:29 +01:00
remoteproc
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reset
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rpmsg
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rtc - New Device Support 2015-09-04 11:35:03 -07:00
s390 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-03 15:46:07 -07:00
sbus
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scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-09-03 08:08:17 -07:00
sfi
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sh
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sn
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soc ARM: SoC driver updates for v4.3 2015-09-01 13:00:04 -07:00
spi Merge remote-tracking branches 'spi/topic/ti-qspi', 'spi/topic/xcomm' and 'spi/topic/xlp' into spi-next 2015-08-31 14:45:45 +01:00
spmi Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 14:33:35 -07:00
ssb
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staging media updates for v4.3-rc1 2015-09-05 18:21:14 -07:00
target Merge branch 'for-4.3/sg' of git://git.kernel.dk/linux-block 2015-09-02 13:22:38 -07:00
tc
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thermal Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 08:40:25 -07:00
thunderbolt
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tty Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
uio
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usb Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-09-01 18:46:42 -07:00
uwb
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vfio
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vhost
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video Merge branch 'akpm' (patches from Andrew) 2015-09-05 14:27:38 -07:00
virt
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virtio
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vlynq
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vme
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w1 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-09-01 18:46:42 -07:00
watchdog - New Device Support 2015-09-04 11:35:03 -07:00
xen Power management and ACPI material for v4.3-rc1 2015-09-01 19:45:46 -07:00
zorro
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Kconfig Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
Makefile This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00