20108e7a7c
Changes in 4.9.185
tracing: Silence GCC 9 array bounds warning
gcc-9: silence 'address-of-packed-member' warning
scsi: ufs: Avoid runtime suspend possibly being blocked forever
usb: chipidea: udc: workaround for endpoint conflict issue
IB/hfi1: Silence txreq allocation warnings
Input: uinput - add compat ioctl number translation for UI_*_FF_UPLOAD
apparmor: enforce nullbyte at end of tag string
ARC: fix build warnings with !CONFIG_KPROBES
parport: Fix mem leak in parport_register_dev_model
parisc: Fix compiler warnings in float emulation code
IB/rdmavt: Fix alloc_qpn() WARN_ON()
IB/hfi1: Insure freeze_work work_struct is canceled on shutdown
IB/{qib, hfi1, rdmavt}: Correct ibv_devinfo max_mr value
MIPS: uprobes: remove set but not used variable 'epc'
net: dsa: mv88e6xxx: avoid error message on remove from VLAN 0
net: hns: Fix loopback test failed at copper ports
sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD
net: ethernet: mediatek: Use hw_feature to judge if HWLRO is supported
net: ethernet: mediatek: Use NET_IP_ALIGN to judge if HW RX_2BYTE_OFFSET is enabled
drm/arm/hdlcd: Allow a bit of clock tolerance
scripts/checkstack.pl: Fix arm64 wrong or unknown architecture
scsi: ufs: Check that space was properly alloced in copy_query_response
s390/qeth: fix VLAN attribute in bridge_hostnotify udev event
hwmon: (pmbus/core) Treat parameters as paged if on multiple pages
nvme: Fix u32 overflow in the number of namespace list calculation
btrfs: start readahead also in seed devices
can: flexcan: fix timeout when set small bitrate
can: purge socket error queue on sock destruct
powerpc/bpf: use unsigned division instruction for 64-bit operations
ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX
Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
Bluetooth: Fix regression with minimum encryption key size alignment
cfg80211: fix memory leak of wiphy device name
mac80211: drop robust management frames from unknown TA
mac80211: Do not use stack memory with scatterlist for GMAC
IB/hfi1: Avoid hardlockup with flushlist_lock
perf ui helpline: Use strlcpy() as a shorter form of strncpy() + explicit set nul
perf help: Remove needless use of strncpy()
perf header: Fix unchecked usage of strncpy()
9p/rdma: do not disconnect on down_interruptible EAGAIN
9p: acl: fix uninitialized iattr access
9p/rdma: remove useless check in cm_event_handler
9p: p9dirent_read: check network-provided name length
net/9p: include trans_common.h to fix missing prototype warning.
fs/proc/array.c: allow reporting eip/esp for all coredumping threads
fs/binfmt_flat.c: make load_flat_shared_library() work
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
scsi: vmw_pscsi: Fix use-after-free in pvscsi_queue_lck()
x86/speculation: Allow guests to use SSBD even if host does not
NFS/flexfiles: Use the correct TCP timeout for flexfiles I/O
cpu/speculation: Warn on unsupported mitigations= parameter
af_packet: Block execution of tasks waiting for transmit to complete in AF_PACKET
net: stmmac: fixed new system time seconds value calculation
sctp: change to hold sk after auth shkey is created successfully
tipc: change to use register_pernet_device
tipc: check msg->req data len in tipc_nl_compat_bearer_disable
tun: wake up waitqueues after IFF_UP is set
team: Always enable vlan tx offload
bonding: Always enable vlan tx offload
ipv4: Use return value of inet_iif() for __raw_v4_lookup in the while loop
bpf: udp: Avoid calling reuseport's bpf_prog from udp_gro
bpf: udp: ipv6: Avoid running reuseport's bpf_prog from __udp6_lib_err
tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit_skb
Bluetooth: Fix faulty expression for minimum encryption key size check
ASoC : cs4265 : readable register too low
ASoC: soc-pcm: BE dai needs prepare when pause release after resume
spi: bitbang: Fix NULL pointer dereference in spi_unregister_master
drm/mediatek: fix unbind functions
ASoC: max98090: remove 24-bit format support if RJ is 0
usb: gadget: fusb300_udc: Fix memory leak of fusb300->ep[i]
usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC
scsi: hpsa: correct ioaccel2 chaining
scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE
mm/mlock.c: change count_mm_mlocked_page_nr return type
MIPS: math-emu: do not use bools for arithmetic
MIPS: netlogic: xlr: Remove erroneous check in nlm_fmn_send()
mfd: omap-usb-tll: Fix register offsets
ARC: fix allnoconfig build warning
bug.h: work around GCC PR82365 in BUG()
ARC: handle gcc generated __builtin_trap for older compiler
clk: sunxi: fix uninitialized access
KVM: x86: degrade WARN to pr_warn_ratelimited
drm/i915/dmc: protect against reading random memory
MIPS: Workaround GCC __builtin_unreachable reordering bug
ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME
crypto: user - prevent operating on larval algorithms
ALSA: seq: fix incorrect order of dest_client/dest_ports arguments
ALSA: firewire-lib/fireworks: fix miss detection of received MIDI messages
ALSA: line6: Fix write on zero-sized buffer
ALSA: usb-audio: fix sign unintended sign extension on left shifts
lib/mpi: Fix karactx leak in mpi_powm
drm/imx: notify drm core before sending event during crtc disable
drm/imx: only send event on crtc disable if kept disabled
btrfs: Ensure replaced device doesn't have pending chunk allocation
tty: rocket: fix incorrect forward declaration of 'rp_init()'
arm64, vdso: Define vdso_{start,end} as array
KVM: LAPIC: Fix pending interrupt in IRR blocked by software disable LAPIC
IB/hfi1: Close PSM sdma_progress sleep window
MIPS: Add missing EHB in mtc0 -> mfc0 sequence.
dmaengine: imx-sdma: remove BD_INTR for channel0
arm64: kaslr: keep modules inside module region when KASAN is enabled
Linux 4.9.185
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/*
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* Copyright (C) 2004, 2007 Maciej W. Rozycki
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_COMPILER_H
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#define _ASM_COMPILER_H
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/*
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* With GCC 4.5 onwards we can use __builtin_unreachable to indicate to the
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* compiler that a particular code path will never be hit. This allows it to be
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* optimised out of the generated binary.
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*
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* Unfortunately at least GCC 4.6.3 through 7.3.0 inclusive suffer from a bug
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* that can lead to instructions from beyond an unreachable statement being
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* incorrectly reordered into earlier delay slots if the unreachable statement
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* is the only content of a case in a switch statement. This can lead to
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* seemingly random behaviour, such as invalid memory accesses from incorrectly
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* reordered loads or stores. See this potential GCC fix for details:
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*
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* https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00360.html
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*
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* It is unclear whether GCC 8 onwards suffer from the same issue - nothing
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* relevant is mentioned in GCC 8 release notes and nothing obviously relevant
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* stands out in GCC commit logs, but these newer GCC versions generate very
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* different code for the testcase which doesn't exhibit the bug.
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*
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* GCC also handles stack allocation suboptimally when calling noreturn
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* functions or calling __builtin_unreachable():
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*
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* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
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*
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* We work around both of these issues by placing a volatile asm statement,
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* which GCC is prevented from reordering past, prior to __builtin_unreachable
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* calls.
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*
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* The .insn statement is required to ensure that any branches to the
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* statement, which sadly must be kept due to the asm statement, are known to
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* be branches to code and satisfy linker requirements for microMIPS kernels.
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*/
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#undef barrier_before_unreachable
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#define barrier_before_unreachable() asm volatile(".insn")
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define GCC_IMM_ASM() "n"
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#define GCC_REG_ACCUM "$0"
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#else
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#define GCC_IMM_ASM() "rn"
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#define GCC_REG_ACCUM "accum"
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#endif
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#ifdef CONFIG_CPU_MIPSR6
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/* All MIPS R6 toolchains support the ZC constrain */
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#define GCC_OFF_SMALL_ASM() "ZC"
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#else
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#ifndef CONFIG_CPU_MICROMIPS
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#define GCC_OFF_SMALL_ASM() "R"
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#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
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#define GCC_OFF_SMALL_ASM() "ZC"
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#else
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#error "microMIPS compilation unsupported with GCC older than 4.9"
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#endif /* CONFIG_CPU_MICROMIPS */
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#endif /* CONFIG_CPU_MIPSR6 */
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#ifdef CONFIG_CPU_MIPSR6
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#define MIPS_ISA_LEVEL "mips64r6"
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#define MIPS_ISA_ARCH_LEVEL MIPS_ISA_LEVEL
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#define MIPS_ISA_LEVEL_RAW mips64r6
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#define MIPS_ISA_ARCH_LEVEL_RAW MIPS_ISA_LEVEL_RAW
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#else
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/* MIPS64 is a superset of MIPS32 */
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#define MIPS_ISA_LEVEL "mips64r2"
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#define MIPS_ISA_ARCH_LEVEL "arch=r4000"
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#define MIPS_ISA_LEVEL_RAW mips64r2
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#define MIPS_ISA_ARCH_LEVEL_RAW MIPS_ISA_LEVEL_RAW
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#endif /* CONFIG_CPU_MIPSR6 */
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#endif /* _ASM_COMPILER_H */
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