Will Deacon 20a004e7b0 arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables ... In many cases, page tables can be accessed concurrently by either another CPU (due to things like fast gup) or by the hardware page table walker itself, which may set access/dirty bits. In such cases, it is important to use READ_ONCE/WRITE_ONCE when accessing page table entries so that entries cannot be torn, merged or subject to apparent loss of coherence due to compiler transformations. Whilst there are some scenarios where this cannot happen (e.g. pinned kernel mappings for the linear region), the overhead of using READ_ONCE /WRITE_ONCE everywhere is minimal and makes the code an awful lot easier to reason about. This patch consistently uses these macros in the arch code, as well as explicitly namespacing pointers to page table entries from the entries themselves by using adopting a 'p' suffix for the former (as is sometimes used elsewhere in the kernel source). Tested-by: Yury Norov <ynorov@caviumnetworks.com> Tested-by: Richard Ruigrok <rruigrok@codeaurora.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2018-02-16 18:13:57 +00:00
..
probes	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vdso	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
.gitignore
acpi_numa.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
acpi_parking_protocol.c	arm64: fix endianness annotation in acpi_parking_protocol.c	2017-06-29 11:33:15 +01:00
acpi.c	More ACPI updates for v4.16-rc1	2018-02-09 09:44:25 -08:00
alternative.c	arm64: alternatives: use tpidr_el2 on VHE hosts	2018-01-13 10:44:33 +00:00
arm64ksyms.c	arm64: uaccess: Mask __user pointers for __arch_{clear, copy_*}_user	2018-02-06 22:53:40 +00:00
armv8_deprecated.c	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
asm-offsets.c	KVM: arm64: Handle RAS SErrors from EL2 on guest exit	2018-01-16 15:09:36 +00:00
bpi.S	arm64: Kill PSCI_GET_VERSION as a variant-2 workaround	2018-02-06 22:54:18 +00:00
cacheinfo.c
cpu_errata.c	arm64: Add missing Falkor part number for branch predictor hardening	2018-02-12 11:28:45 +00:00
cpu_ops.c	arm64: cpu_ops: Add missing 'const' qualifiers	2017-12-01 13:05:08 +00:00
cpu-reset.h
cpu-reset.S	arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives	2018-02-06 22:53:27 +00:00
cpufeature.c	2nd set of arm64 updates for 4.16:	2018-02-08 10:44:25 -08:00
cpuidle.c	ARM64 / cpuidle: Use new cpuidle macro for entering retention state	2018-01-02 13:50:34 +00:00
cpuinfo.c	arm64: v8.4: Support for new floating point multiplication instructions	2018-01-05 11:29:48 +00:00
crash_dump.c
debug-monitors.c	signal: Don't use structure initializers for struct siginfo	2018-01-22 19:07:08 -06:00
efi-entry.S	arm64: Add software workaround for Falkor erratum 1041	2018-02-06 22:53:13 +00:00
efi-header.S
efi.c	arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables	2018-02-16 18:13:57 +00:00
entry32.S
entry-fpsimd.S	arm64/sve: Low-level SVE architectural state manipulation functions	2017-11-03 15:24:14 +00:00
entry-ftrace.S	arm64: Fix static use of function graph	2017-11-03 12:05:23 +00:00
entry.S	2nd set of arm64 updates for 4.16:	2018-02-08 10:44:25 -08:00
fpsimd.c	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-01-30 14:18:52 -08:00
ftrace.c	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
head.S	arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives	2018-02-06 22:53:27 +00:00
hibernate-asm.S	arm64: assembler: Change order of macro arguments in phys_to_ttbr	2018-02-06 22:53:21 +00:00
hibernate.c	arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables	2018-02-16 18:13:57 +00:00
hw_breakpoint.c	arm64: hw_breakpoint: Use linux/uaccess.h instead of asm/uaccess.h	2017-12-12 11:53:26 +00:00
hyp-stub.S
image.h
insn.c	arm64 updates for 4.13:	2017-07-05 17:09:27 -07:00
io.c	arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io	2017-10-24 16:23:07 +01:00
irq.c	arm64: Add vmap_stack header file	2018-01-13 10:45:03 +00:00
jump_label.c
kaslr.c	arm64: kaslr: Adjust the offset to avoid Image across alignment boundary	2017-08-22 18:15:42 +01:00
kgdb.c
kuser32.S
machine_kexec.c	arm64: explicitly mask all exceptions	2017-11-02 15:55:40 +00:00
Makefile	arm64: kernel: Add arch-specific SDEI entry code and CPU masking	2018-01-13 10:45:17 +00:00
module-plts.c	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
module.c	arm64: fix endianness annotation for reloc_insn_movw() & reloc_insn_imm()	2017-06-29 11:09:39 +01:00
module.lds	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
paravirt.c
pci.c	PCI: Add a generic weak pcibios_align_resource()	2017-08-02 14:53:16 -05:00
perf_callchain.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
perf_event.c	bitmap: replace bitmap_{from,to}_u32array	2018-02-06 18:32:44 -08:00
perf_regs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
process.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
psci.c
ptrace.c	signal/ptrace: Add force_sig_ptrace_errno_trap and use it where needed	2018-01-22 19:07:11 -06:00
reloc_test_core.c
reloc_test_syms.S
relocate_kernel.S	arm64: Add software workaround for Falkor erratum 1041	2018-02-06 22:53:13 +00:00
return_address.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
sdei.c	arm64: sdei: Add trampoline code for remapping the kernel	2018-01-14 18:49:50 +00:00
setup.c	arm64: Move the async/fiq helpers to explicitly set process context flags	2017-11-02 15:55:41 +00:00
signal32.c	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-01-30 14:18:52 -08:00
signal.c	arm64: fpsimd: Fix state leakage when migrating after sigreturn	2018-01-16 14:39:50 +00:00
sleep.S	arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives	2018-02-06 22:53:27 +00:00
smccc-call.S
smp_spin_table.c
smp.c	arm64: kernel: Add arch-specific SDEI entry code and CPU masking	2018-01-13 10:45:17 +00:00
stacktrace.c	arm64: stacktrace: avoid listing stacktrace functions in stacktrace	2017-09-13 18:53:16 -07:00
suspend.c	arm64: uaccess: Add PAN helper	2018-01-13 10:45:10 +00:00
sys32.c
sys_compat.c
sys.c
time.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
topology.c	arm64: Use of_cpu_node_to_id helper for CPU topology parsing	2018-01-02 16:43:12 +00:00
trace-events-emulation.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
traps.c	arm64: kernel: Survive corrected RAS errors notified by SError	2018-01-16 15:06:28 +00:00
vdso.c	arm64/vdso: Support mremap() for vDSO	2017-08-09 12:16:28 +01:00
vmlinux.lds.S	arm64: Extend early page table code to allow for larger kernels	2018-01-14 18:49:52 +00:00