linux_dsm_epyc7002/arch/mips
Nathan Chancellor cc1c1fe795 MIPS: Compare __SYNC_loongson3_war against 0
[ Upstream commit 8790ccf8daf1a8c53b6cb8ce0c9a109274bd3fa8 ]

When building with clang when CONFIG_CPU_LOONGSON3_WORKAROUNDS is
enabled:

 In file included from lib/errseq.c:4:
 In file included from ./include/linux/atomic.h:7:
 ./arch/mips/include/asm/atomic.h:52:1: warning: converting the result of
 '<<' to a boolean always evaluates to true
 [-Wtautological-constant-compare]
 ATOMIC_OPS(atomic64, s64)
 ^
 ./arch/mips/include/asm/atomic.h:40:9: note: expanded from macro
 'ATOMIC_OPS'
         return cmpxchg(&v->counter, o, n);
                ^
 ./arch/mips/include/asm/cmpxchg.h:194:7: note: expanded from macro
 'cmpxchg'
         if (!__SYNC_loongson3_war)
              ^
 ./arch/mips/include/asm/sync.h:147:34: note: expanded from macro
 '__SYNC_loongson3_war'
 # define __SYNC_loongson3_war   (1 << 31)
                                    ^

While it is not wrong that the result of this shift is always true in a
boolean context, it is not a problem here. Regardless, the warning is
really noisy so rather than making the shift a boolean implicitly, use
it in an equality comparison so the shift is used as an integer value.

Fixes: 4d1dbfe6cb ("MIPS: atomic: Emit Loongson3 sync workarounds within asm")
Fixes: a91f2a1dba ("MIPS: cmpxchg: Omit redundant barriers for Loongson3")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:41 +01:00
..
alchemy MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu 2020-11-17 12:53:57 +01:00
ar7 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
ath25 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
ath79 MIPS: ath79: Remove unused include <asm/mips_machine.h> 2020-07-28 10:20:44 +02:00
bcm47xx MIPS: BCM47XX: fix kconfig dependency bug for BCM47XX_BCMA 2020-12-30 11:53:09 +01:00
bcm63xx MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
bmips dma-direct: rename and cleanup __phys_to_dma 2020-09-11 09:14:43 +02:00
boot MIPS: boot: Fix unaligned access with CONFIG_MIPS_RAW_APPENDED_DTB 2021-01-19 18:27:20 +01:00
cavium-octeon MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
cobalt MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
configs MIPS: Loongson64: Select SMP in Kconfig to avoid build error 2020-10-12 11:22:40 +02:00
crypto crypto: {arm,arm64,mips}/poly1305 - remove redundant non-reduction from emit 2020-01-16 15:18:12 +08:00
dec MIPS: DEC: Restore bootmem reservation for firmware working memory area 2020-10-14 23:57:57 +02:00
fw MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
generic MIPS: Ingenic: Add system type for new Ingenic SoCs. 2020-09-27 10:57:27 +02:00
include MIPS: Compare __SYNC_loongson3_war against 0 2021-03-04 11:37:41 +01:00
ingenic MIPS: jz4740: Rename jz4740 folders to ingenic 2020-09-18 16:35:05 +02:00
jazz dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
kernel MIPS: properly stop .eh_frame generation 2021-03-04 11:37:41 +01:00
kvm KVM: MIPS: clean up redundant kvm_run parameters in assembly 2020-09-28 07:57:21 -04:00
lantiq MIPS: lantiq: Explicitly compare LTQ_EBU_PCC_ISTAT against 0 2021-03-04 11:37:38 +01:00
lib mips: lib: uncached: fix non-standard usage of variable 'sp' 2021-01-19 18:27:20 +01:00
loongson2ef MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
loongson32 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
loongson64 MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
math-emu MIPS: Use fallthrough for arch/mips 2020-05-07 11:55:47 +02:00
mm MIPS: c-r4k: Fix section mismatch for loongson2_sc_init 2021-03-04 11:37:38 +01:00
mti-malta MIPS: malta: remove mach-malta/malta-dtshim.h header file 2020-09-21 22:16:47 +02:00
net MIPS: BPF: Use sizeof_field() instead of FIELD_SIZEOF() 2020-01-10 11:33:35 -08:00
netlogic MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
oprofile mips/oprofile: Fix fallthrough placement 2020-08-22 09:23:15 +02:00
pci MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
pic32 MIPS: Only include the platform file needed 2020-05-13 00:17:18 +02:00
pistachio MIPS: Fix exception handler memcpy() 2020-05-24 09:15:54 +02:00
power mips: check for dsp presence only once before save/restore 2019-10-07 10:58:53 -07:00
ralink MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
rb532 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
sgi-ip22 MIPS: Only include the platform file needed 2020-05-13 00:17:18 +02:00
sgi-ip27 mm/sparse: cleanup the code surrounding memory_present() 2020-08-07 11:33:27 -07:00
sgi-ip30 MIPS: SGI-IP30: Move irq bits to better header files 2020-09-21 22:15:49 +02:00
sgi-ip32 MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
sibyte MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
sni MIPS: SNI: Fix spurious interrupts 2020-09-16 22:40:58 +02:00
tools MIPS: tools: Fix resource leak in elf-entry.c 2020-05-24 09:29:48 +02:00
txx9 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
vdso kbuild: explicitly specify the build id style 2020-10-09 23:57:30 +09:00
vr41xx MIPS: Fix builds for VR41xx platforms 2020-05-15 09:09:58 +02:00
Kbuild MIPS: Fix "make clean" error due to recent changes 2020-05-13 13:20:22 +02:00
Kbuild.platforms MIPS: generic: Add support for Ingenic SoCs 2020-09-18 16:33:59 +02:00
Kconfig Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-22 09:59:21 -07:00
Kconfig.debug mips: Add CPS_NS16550_WIDTH config 2020-05-22 09:12:52 +02:00
Makefile mips: Add MIPS Warrior P5600 support 2020-05-22 09:10:53 +02:00
Makefile.postlink MIPS: fix indentation of the 'RELOCS' message 2020-01-20 15:37:30 -08:00