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linux/arch/mips
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James Hogan 6538953f1e
MIPS: mipsregs.h: Make read_c0_prid use const accessor 
Make read_c0_prid() use the new constant accessor macros so that it can
potentially be optimised or removed by the compiler. This is
particularly important under virtualisation, where even with hardware
assisted virtualisation (VZ), access to the PRid register may need to be
emulated by the hypervisor.

In particular this helps eliminate the read of the PRid register in the
rather frequently called add_interrupt_randomness() (which calls into
arch/mips/include/asm/timex.h) when the prid is unused but the read
can't be removed due to the inline asm being marked __volatile__.

Reported-by: Yann LeDu <Yann.LeDu@imgtec.com>
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Maciej W. Rozycki <macro@mips.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17923/
2018-01-09 22:26:45 +00:00
..
alchemy MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
ar7 MIPS: AR7: Ensure that serial ports are properly set up 2017-11-08 14:57:55 +00:00
ath25 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ath79 Merge branch 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-11-14 17:52:21 -08:00
bcm47xx MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
bcm63xx MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
bmips License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
boot kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
cavium-octeon MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
cobalt MIPS: Cobalt: Fix typo 2016-08-03 08:16:30 +02:00
configs MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
dec License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
emma MIPS: Avoid old-style declaration 2017-01-25 02:51:11 +01:00
fw License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
generic MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
include MIPS: mipsregs.h: Make read_c0_prid use const accessor 2018-01-09 22:26:45 +00:00
jazz License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
jz4740 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kernel AFS development 2017-11-16 11:41:22 -08:00
kvm KVM: Let KVM_SET_SIGNAL_MASK work as advertised 2017-11-27 17:53:47 +01:00
lantiq MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
lasat treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
lib License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
loongson32 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
loongson64 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
math-emu MIPS: math-emu: Mark fall throughs in switch statements with a comment 2017-12-12 17:20:20 +01:00
mm MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
mti-malta treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
net MIPS: bpf: Fix a typo in build_one_insn() 2017-11-01 00:09:17 +00:00
netlogic License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
paravirt License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
pic32 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pnx833x mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
rb532 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sgi-ip22 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
sgi-ip27 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sgi-ip32 mips: ip22/32: Convert timers to use timer_setup() 2017-11-02 15:50:36 -07:00
sibyte License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sni License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tools Update MIPS email addresses 2017-11-03 09:02:30 -07:00
txx9 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vr41xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig MIPS changes for 4.15 2017-11-15 11:36:08 -08:00
Kconfig.debug License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00