From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sven Schnelle <svens@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Sasha Levin <sashal@kernel.org>,
gor@linux.ibm.com, agordeev@linux.ibm.com,
linux-s390@vger.kernel.org
Subject: [PATCH AUTOSEL 5.17 08/21] s390: disable -Warray-bounds
Date: Tue, 10 May 2022 11:43:27 -0400 [thread overview]
Message-ID: <20220510154340.153400-8-sashal@kernel.org> (raw)
In-Reply-To: <20220510154340.153400-1-sashal@kernel.org>
From: Sven Schnelle <svens@linux.ibm.com>
[ Upstream commit 8b202ee218395319aec1ef44f72043e1fbaccdd6 ]
gcc-12 shows a lot of array bound warnings on s390. This is caused
by the S390_lowcore macro which uses a hardcoded address of 0.
Wrapping that with absolute_pointer() works, but gcc no longer knows
that a 12 bit displacement is sufficient to access lowcore. So it
emits instructions like 'lghi %r1,0; l %rx,xxx(%r1)' instead of a
single load/store instruction. As s390 stores variables often
read/written in lowcore, this is considered problematic. Therefore
disable -Warray-bounds on s390 for gcc-12 for the time being, until
there is a better solution.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/yt9dzgkelelc.fsf@linux.ibm.com
Link: https://lore.kernel.org/r/20220422134308.1613610-1-svens@linux.ibm.com
Link: https://lore.kernel.org/r/20220425121742.3222133-1-svens@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/Makefile | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 609e3697324b..6e42252214dd 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -30,6 +30,16 @@ KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
+
+ifdef CONFIG_CC_IS_GCC
+ ifeq ($(call cc-ifversion, -ge, 1200, y), y)
+ ifeq ($(call cc-ifversion, -lt, 1300, y), y)
+ KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
+ KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds)
+ endif
+ endif
+endif
+
UTS_MACHINE := s390x
STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384)
CHECKFLAGS += -D__s390__ -D__s390x__
--
2.35.1
next prev parent reply other threads:[~2022-05-10 15:45 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 15:43 [PATCH AUTOSEL 5.17 01/21] hwmon: (asus_wmi_sensors) Fix CROSSHAIR VI HERO name Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 02/21] hwmon: (f71882fg) Fix negative temperature Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 03/21] RDMA/irdma: Fix deadlock in irdma_cleanup_cm_core() Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 04/21] iommu: arm-smmu: disable large page mappings for Nvidia arm-smmu Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 05/21] ASoC: max98090: Reject invalid values in custom control put() Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 06/21] ASoC: max98090: Generate notifications on changes for custom control Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 07/21] ASoC: ops: Validate input values in snd_soc_put_volsw_range() Sasha Levin
2022-05-10 15:43 ` Sasha Levin [this message]
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 09/21] ASoC: SOF: Fix NULL pointer exception in sof_pci_probe callback Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 10/21] io_uring: assign non-fixed early for async work Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 11/21] net: emaclite: Don't advertise 1000BASE-T and do auto negotiation Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 12/21] net: sfp: Add tx-fault workaround for Huawei MA5671A SFP ONT Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 13/21] secure_seq: use the 64 bits of the siphash for port offset calculation Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 14/21] tcp: use different parts of the port_offset for index and offset Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 15/21] tcp: resalt the secret every 10 seconds Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 16/21] tcp: add small random increments to the source port Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 17/21] tcp: dynamically allocate the perturb table used by source ports Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 18/21] tcp: increase source port perturb table to 2^16 Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 19/21] tcp: drop the hash_32() part from the index calculation Sasha Levin
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 20/21] block: Do not call folio_next() on an unreferenced folio Sasha Levin
2022-05-10 17:29 ` Matthew Wilcox
2022-05-10 15:43 ` [PATCH AUTOSEL 5.17 21/21] Revert "parisc: Fix patch code locking and flushing" Sasha Levin
2022-05-10 15:49 ` Helge Deller
2022-05-14 16:24 ` Sasha Levin
2022-05-14 16:47 ` John David Anglin
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