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Date: Sun, 16 Jan 2022 05:41:08 +0800
From: kernel test robot <lkp@...el.com>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [ojeda-linux:doc 955/959] init/Kconfig:2084: syntax error
tree: https://github.com/ojeda/linux.git doc
head: 2fc4925b38062461996c9ae2bdf227d1383117ce
commit: cf009425efb0d9533b5bf09ebd304b938e4e5dc2 [955/959] rust: rework Rust toolchain detection
config: microblaze-buildonly-randconfig-r005-20220116
compiler: microblaze-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/ojeda/linux/commit/cf009425efb0d9533b5bf09ebd304b938e4e5dc2
git remote add ojeda-linux https://github.com/ojeda/linux.git
git fetch --no-tags ojeda-linux doc
git checkout cf009425efb0d9533b5bf09ebd304b938e4e5dc2
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=microblaze buildonly-randconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=microblaze
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
error: no override and no default toolchain set
>> init/Kconfig:2084: syntax error
init/Kconfig:2083: invalid statement
>> sh: 1: bindgen: not found
init/Kconfig:2089: syntax error
init/Kconfig:2088: invalid statement
make[2]: *** [scripts/kconfig/Makefile:77: oldconfig] Error 1
make[1]: *** [Makefile:666: oldconfig] Error 2
make: *** [Makefile:226: __sub-make] Error 2
make: Target 'oldconfig' not remade because of errors.
--
error: no override and no default toolchain set
>> init/Kconfig:2084: syntax error
init/Kconfig:2083: invalid statement
>> sh: 1: bindgen: not found
init/Kconfig:2089: syntax error
init/Kconfig:2088: invalid statement
make[2]: *** [scripts/kconfig/Makefile:77: olddefconfig] Error 1
make[1]: *** [Makefile:666: olddefconfig] Error 2
make: *** [Makefile:226: __sub-make] Error 2
make: Target 'olddefconfig' not remade because of errors.
vim +2084 init/Kconfig
1944
1945 config SLAB_MERGE_DEFAULT
1946 bool "Allow slab caches to be merged"
1947 default y
1948 help
1949 For reduced kernel memory fragmentation, slab caches can be
1950 merged when they share the same size and other characteristics.
1951 This carries a risk of kernel heap overflows being able to
1952 overwrite objects from merged caches (and more easily control
1953 cache layout), which makes such heap attacks easier to exploit
1954 by attackers. By keeping caches unmerged, these kinds of exploits
1955 can usually only damage objects in the same cache. To disable
1956 merging at runtime, "slab_nomerge" can be passed on the kernel
1957 command line.
1958
1959 config SLAB_FREELIST_RANDOM
1960 bool "Randomize slab freelist"
1961 depends on SLAB || SLUB
1962 help
1963 Randomizes the freelist order used on creating new pages. This
1964 security feature reduces the predictability of the kernel slab
1965 allocator against heap overflows.
1966
1967 config SLAB_FREELIST_HARDENED
1968 bool "Harden slab freelist metadata"
1969 depends on SLAB || SLUB
1970 help
1971 Many kernel heap attacks try to target slab cache metadata and
1972 other infrastructure. This options makes minor performance
1973 sacrifices to harden the kernel slab allocator against common
1974 freelist exploit methods. Some slab implementations have more
1975 sanity-checking than others. This option is most effective with
1976 CONFIG_SLUB.
1977
1978 config SHUFFLE_PAGE_ALLOCATOR
1979 bool "Page allocator randomization"
1980 default SLAB_FREELIST_RANDOM && ACPI_NUMA
1981 help
1982 Randomization of the page allocator improves the average
1983 utilization of a direct-mapped memory-side-cache. See section
1984 5.2.27 Heterogeneous Memory Attribute Table (HMAT) in the ACPI
1985 6.2a specification for an example of how a platform advertises
1986 the presence of a memory-side-cache. There are also incidental
1987 security benefits as it reduces the predictability of page
1988 allocations to compliment SLAB_FREELIST_RANDOM, but the
1989 default granularity of shuffling on the "MAX_ORDER - 1" i.e,
1990 10th order of pages is selected based on cache utilization
1991 benefits on x86.
1992
1993 While the randomization improves cache utilization it may
1994 negatively impact workloads on platforms without a cache. For
1995 this reason, by default, the randomization is enabled only
1996 after runtime detection of a direct-mapped memory-side-cache.
1997 Otherwise, the randomization may be force enabled with the
1998 'page_alloc.shuffle' kernel command line parameter.
1999
2000 Say Y if unsure.
2001
2002 config SLUB_CPU_PARTIAL
2003 default y
2004 depends on SLUB && SMP
2005 bool "SLUB per cpu partial cache"
2006 help
2007 Per cpu partial caches accelerate objects allocation and freeing
2008 that is local to a processor at the price of more indeterminism
2009 in the latency of the free. On overflow these caches will be cleared
2010 which requires the taking of locks that may cause latency spikes.
2011 Typically one would choose no for a realtime system.
2012
2013 config MMAP_ALLOW_UNINITIALIZED
2014 bool "Allow mmapped anonymous memory to be uninitialized"
2015 depends on EXPERT && !MMU
2016 default n
2017 help
2018 Normally, and according to the Linux spec, anonymous memory obtained
2019 from mmap() has its contents cleared before it is passed to
2020 userspace. Enabling this config option allows you to request that
2021 mmap() skip that if it is given an MAP_UNINITIALIZED flag, thus
2022 providing a huge performance boost. If this option is not enabled,
2023 then the flag will be ignored.
2024
2025 This is taken advantage of by uClibc's malloc(), and also by
2026 ELF-FDPIC binfmt's brk and stack allocator.
2027
2028 Because of the obvious security issues, this option should only be
2029 enabled on embedded devices where you control what is run in
2030 userspace. Since that isn't generally a problem on no-MMU systems,
2031 it is normally safe to say Y here.
2032
2033 See Documentation/admin-guide/mm/nommu-mmap.rst for more information.
2034
2035 config SYSTEM_DATA_VERIFICATION
2036 def_bool n
2037 select SYSTEM_TRUSTED_KEYRING
2038 select KEYS
2039 select CRYPTO
2040 select CRYPTO_RSA
2041 select ASYMMETRIC_KEY_TYPE
2042 select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
2043 select ASN1
2044 select OID_REGISTRY
2045 select X509_CERTIFICATE_PARSER
2046 select PKCS7_MESSAGE_PARSER
2047 help
2048 Provide PKCS#7 message verification using the contents of the system
2049 trusted keyring to provide public keys. This then can be used for
2050 module verification, kexec image verification and firmware blob
2051 verification.
2052
2053 config PROFILING
2054 bool "Profiling support"
2055 help
2056 Say Y here to enable the extended profiling support mechanisms used
2057 by profilers.
2058
2059 config RUST
2060 bool "Rust support"
2061 depends on RUST_IS_AVAILABLE
2062 depends on ARM64 || CPU_32v6 || CPU_32v6K || (PPC64 && CPU_LITTLE_ENDIAN) || X86_64 || RISCV
2063 depends on !COMPILE_TEST
2064 depends on !MODVERSIONS
2065 depends on !GCC_PLUGIN_RANDSTRUCT
2066 default n
2067 help
2068 Enables Rust support in the kernel.
2069
2070 This allows other Rust-related options, like drivers written in Rust,
2071 to be selected.
2072
2073 It is also required to be able to load external kernel modules
2074 written in Rust.
2075
2076 See Documentation/rust/ for more information.
2077
2078 If unsure, say N.
2079
2080 config RUSTC_VERSION_TEXT
2081 depends on RUST
2082 string
2083 default $(shell,$(RUSTC) --version)
> 2084
---
0-DAY CI Kernel Test Service, Intel Corporation
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