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Max Filippov 56b84e4201 xtensa: SMP: fix secondary CPU initialization 
[ Upstream commit 32a7726c4f4aadfabdb82440d84f88a5a2c8fe13 ]

- add missing memory barriers to the secondary CPU synchronization spin
  loops; add comment to the matching memory barrier in the boot_secondary
  and __cpu_die functions;
- use READ_ONCE/WRITE_ONCE to access cpu_start_id/cpu_start_ccount
  instead of reading/writing them directly;
- re-initialize cpu_running every time before starting secondary CPU to
  flush possible previous CPU startup results.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-23 08:44:25 +01:00
..
alpha alpha: Fix Eiger NR_IRQS to 128 2019-02-20 10:13:22 +01:00
arc ARC: fix __ffs return value to avoid build warnings 2019-03-23 08:44:19 +01:00
arm KVM: arm/arm64: Fix MMIO emulation data handling 2019-03-23 08:44:20 +01:00
arm64 arm64: ftrace: don't adjust the LR value 2019-02-20 10:13:07 +01:00
avr32 avr32: off by one in at32_init_pio() 2016-10-07 15:23:45 +02:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:05:00 +01:00
c6x c6x/ptrace: Remove useless PTRACE_SETREGSET implementation 2017-03-31 09:49:53 +02:00
cris mm: replace get_user_pages() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
frv futex: Remove duplicated code and fix undefined behaviour 2018-05-26 08:48:50 +02:00
h8300 h8300/ptrace: Fix incorrect register transfer count 2017-03-31 09:49:53 +02:00
hexagon hexagon: modify ffs() and fls() to return int 2018-10-10 08:52:12 +02:00
ia64 mm: replace get_user_pages() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
m32r m32r: fix __get_user() 2016-09-24 10:07:43 +02:00
m68k m68k: fix "bad page state" oops on ColdFire boot 2018-08-24 13:26:57 +02:00
metag metag/uaccess: Check access_ok in strncpy_from_user 2017-05-25 14:30:16 +02:00
microblaze microblaze: Fix simpleImage format generation 2018-08-06 16:24:39 +02:00
mips MIPS: irq: Allocate accurate order pages for irq stack 2019-03-23 08:44:23 +01:00
mn10300 mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy 2018-02-16 20:09:47 +01:00
nios2 nios2: reserve boot memory for device tree 2017-04-12 12:38:34 +02:00
openrisc kthread: fix boot hang (regression) on MIPS/OpenRISC 2018-09-19 22:48:55 +02:00
parisc parisc: Fix map_pages() to not overwrite existing pte entries 2018-11-21 09:27:30 +01:00
powerpc powerpc: Always initialize input array when calling epapr_hypercall() 2019-03-23 08:44:21 +01:00
s390 s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU 2019-02-06 19:43:05 +01:00
score score: fix copy_from_user() and friends 2016-09-24 10:07:44 +02:00
sh mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
sparc mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
tile futex: Remove duplicated code and fix undefined behaviour 2018-05-26 08:48:50 +02:00
um um: Avoid marking pages with "changed protection" 2019-02-20 10:13:13 +01:00
unicore32 pwm: Changes for v4.4-rc1 2015-11-11 09:16:10 -08:00
x86 x86/CPU/AMD: Set the CPB bit unconditionally on F17h 2019-03-23 08:44:23 +01:00
xtensa xtensa: SMP: fix secondary CPU initialization 2019-03-23 08:44:25 +01:00
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