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4dee90d7b5
kernel_optimize_test/arch/mips
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Paul Burton 4dee90d7b5
MIPS: genex: Don't reload address unnecessarily 
In ejtag_debug_handler() we must reload the address of
ejtag_debug_buffer_spinlock if an sc fails, since the address in k0 will
have been clobbered by the result of the sc instruction. In the case
where we simply load a non-zero value (ie. there's contention for the
lock) the address will not be clobbered & we can simply branch back to
repeat the load from memory without reloading the address into k0.

The primary motivation for this change is that it moves the target of
the bnez instruction to an instruction within the LL/SC loop (the LL
itself), which we know contains no other memory accesses & therefore
isn't affected by Loongson3 LL/SC errata.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-kernel@vger.kernel.org
2019-10-07 09:43:10 -07:00
..
alchemy treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182 2019-05-30 11:29:20 -07:00
ar7 The main MIPS changes for a pretty light v5.3 cycle, including: 2019-07-17 09:42:03 -07:00
ath25
ath79 The main MIPS changes for a pretty light v5.3 cycle, including: 2019-07-17 09:42:03 -07:00
bcm47xx MIPS: BCM47XX: Add support for Netgear R6200 V1 2019-07-25 22:10:05 -07:00
bcm63xx MIPS: fix some more fall through errors in arch/mips 2019-07-16 12:40:16 +01:00
bmips docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
boot MIPS: ralink: Add GARDENA smart Gateway MT7688 board 2019-10-07 09:41:35 -07:00
cavium-octeon Main MIPS changes for v5.4: 2019-09-22 09:30:30 -07:00
cobalt treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
configs Main MIPS changes for v5.4: 2019-09-22 09:30:30 -07:00
crypto
dec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
emma treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
fw MIPS: fw/arc: Remove unused addr variable 2019-10-04 11:46:22 -07:00
generic treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
include MIPS: barrier: Make __smp_mb__before_atomic() a no-op for Loongson3 2019-10-07 09:43:08 -07:00
jazz dma-mapping: explicitly wire up ->mmap and ->get_sgtable 2019-09-04 11:13:18 +02:00
jz4740 Merge branch 'ingenic-tcu-v5.4' into mips-next 2019-08-08 15:33:16 -07:00
kernel MIPS: genex: Don't reload address unnecessarily 2019-10-07 09:43:10 -07:00
kvm Bugfixes (arm and x86) and cleanups. 2019-08-09 15:46:29 -07:00
lantiq MIPS: lantiq: update the clock alias' for the mainline PCIe PHY driver 2019-08-24 15:13:22 +01:00
lasat treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182 2019-05-30 11:29:20 -07:00
lib MIPS: bitops: Use BIT_WORD() & BITS_PER_LONG 2019-10-07 09:42:55 -07:00
loongson32 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
loongson64 MIPS: barrier: Remove loongson_llsc_mb() 2019-10-07 09:43:06 -07:00
math-emu treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 454 2019-06-19 17:09:09 +02:00
mm mips: use generic mmap top-down layout and brk randomization 2019-09-24 15:54:12 -07:00
mti-malta MIPS: malta: Drop prom_free_prom_memory 2019-08-23 14:47:13 +01:00
net treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
netlogic MIPS: xlp: Drop boot_mem_map 2019-08-23 14:47:21 +01:00
oprofile MIPS: OProfile: Mark expected switch fall-throughs 2019-07-30 09:40:17 -07:00
paravirt
pci MIPS: SGI-IP27: get rid of compact node ids 2019-10-07 09:37:59 -07:00
pic32 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
pistachio A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
pmcs-msp71xx MIPS: pmcs-msp71xx: Remove unused addr variable 2019-10-03 15:47:17 -07:00
pnx833x A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
power treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 305 2019-06-05 17:37:04 +02:00
ralink MIPS: ralink: deactivate PCI support for SOC_MT7621 2019-09-06 08:45:03 -07:00
rb532 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 182 2019-05-30 11:29:20 -07:00
sgi-ip22 MIPS: ip22: Drop addr_is_ram 2019-08-23 14:47:18 +01:00
sgi-ip27 MIPS: SGI-IP27: get rid of compact node ids 2019-10-07 09:37:59 -07:00
sgi-ip32 Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2019-07-08 21:48:15 -07:00
sibyte treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
sni treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 210 2019-05-30 11:29:53 -07:00
tools treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
txx9 A batch of MIPS fixes: 2019-06-08 13:09:31 -07:00
vdso MIPS: VDSO: Fix build for binutils < 2.25 2019-10-02 14:07:32 -07:00
vr41xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
Kbuild treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kbuild.platforms treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kconfig MIPS: r4k-bugs64: Limit R4k bug checks to affected systems 2019-10-07 09:38:53 -07:00
Kconfig.debug
Makefile MIPS: Remove unused R8000 CPU support 2019-07-23 14:33:51 -07:00
Makefile.postlink