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Anton Ivanov e8f13f32f4 um: Avoid marking pages with "changed protection" 
[ Upstream commit 8892d8545f2d0342b9c550defbfb165db237044b ]

Changing protection is a very high cost operation in UML
because in addition to an extra syscall it also interrupts
mmap merge sequences generated by the tlb.

While the condition is not particularly common it is worth
avoiding.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-02-12 19:46:08 +01:00
..
alpha
arch/alpha, termios: implement BOTHER, IBSHIFT and termios2
2018-11-21 09:24:10 +01:00
arc
ARC: perf: map generic branches to correct hardware condition
2019-01-31 08:13:43 +01:00
arm
ARM: pxa: avoid section mismatch warning
2019-02-12 19:46:04 +01:00
arm64
arm64: ftrace: don't adjust the LR value
2019-02-12 19:46:01 +01:00
blackfin
pinctrl: adi2: Fix Kconfig build problem
2017-12-20 10:10:34 +01:00
c6x
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
cris
bug.h: work around GCC PR82365 in BUG()
2018-05-30 07:52:00 +02:00
frv
License cleanup: add SPDX license identifier to uapi header files with a license
2017-11-02 11:20:11 +01:00
h8300
h8300: remove extraneous __BIG_ENDIAN definition
2018-03-28 18:24:38 +02:00
hexagon
hexagon: modify ffs() and fls() to return int
2018-10-10 08:54:25 +02:00
ia64
ia64/err-inject: Use get_user_pages_fast()
2018-05-30 07:52:11 +02:00
m32r
m32r: fix endianness constraints
2018-02-28 10:19:44 +01:00
m68k
m68k: fix "bad page state" oops on ColdFire boot
2018-08-24 13:09:11 +02:00
metag
.gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore
2018-02-13 10:19:46 +01:00
microblaze
microblaze: Fix simpleImage format generation
2018-08-03 07:50:40 +02:00
mips
MIPS: ralink: Select CONFIG_CPU_MIPSR2_IRQ_VI on MT7620/8
2019-02-12 19:46:08 +01:00
mn10300
mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
2018-02-16 20:23:11 +01:00
nios2
.gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore
2018-02-13 10:19:46 +01:00
openrisc
openrisc: entry: Fix delay slot exception detection
2018-08-24 13:09:11 +02:00
parisc
parisc: Fix exported address of os_hpmc handler
2018-11-13 11:14:46 -08:00
powerpc
powerpc/fadump: Do not allow hot-remove memory from fadump reserved area.
2019-02-12 19:46:07 +01:00
s390
s390/zcrypt: improve special ap message cmd handling
2019-02-12 19:46:01 +01:00
score
License cleanup: add SPDX license identifier to uapi header files with no license
2017-11-02 11:19:54 +01:00
sh
sh: fix build failure for J2 cpu with SMP disabled
2018-06-21 04:02:54 +09:00
sparc
sparc64: Make proc_id signed.
2018-11-13 11:14:50 -08:00
tile
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
um
um: Avoid marking pages with "changed protection"
2019-02-12 19:46:08 +01:00
unicore32
kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK
2018-02-22 15:42:23 +01:00
x86
KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported
2019-02-12 19:46:07 +01:00
xtensa
xtensa: fix coprocessor part of ptrace_{get,set}xregs
2018-12-05 19:41:23 +01:00
.gitignore
…
Kconfig
compiler.h: Allow arch-specific asm/compiler.h
2018-11-04 14:52:46 +01:00