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* Merge tag 'kbuild-v5.2' of ↵Linus Torvalds2019-05-081-65/+81
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - allow users to invoke 'make' out of the source tree - refactor scripts/mkmakefile - deprecate KBUILD_SRC, which was used to track the source tree location for O= build. - fix recordmcount.pl in case objdump output is localized - turn unresolved symbols in external modules to errors from warnings by default; pass KBUILD_MODPOST_WARN=1 to get them back to warnings - generate modules.builtin.modinfo to collect .modinfo data from built-in modules - misc Makefile cleanups * tag 'kbuild-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (21 commits) .gitignore: add more all*.config patterns moduleparam: Save information about built-in modules in separate file Remove MODULE_ALIAS() calls that take undefined macro .gitignore: add leading and trailing slashes to generated directories scripts/tags.sh: fix direct execution of scripts/tags.sh scripts: override locale from environment when running recordmcount.pl samples: kobject: allow CONFIG_SAMPLE_KOBJECT to become y samples: seccomp: turn CONFIG_SAMPLE_SECCOMP into a bool option kbuild: move Documentation to vmlinux-alldirs kbuild: move samples/ to KBUILD_VMLINUX_OBJS modpost: make KBUILD_MODPOST_WARN also configurable for external modules kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree build kbuild: remove unneeded dependency for include/config/kernel.release memory: squash drivers/memory/Makefile.asm-offsets kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build kbuild: mkmakefile: generate a simple wrapper of top Makefile kbuild: mkmakefile: do not check the generated Makefile marker kbuild: allow Kbuild to start from any directory kbuild: pass $(MAKECMDGOALS) to sub-make as is kbuild: fix warning "overriding recipe for target 'Makefile'" ...
| * moduleparam: Save information about built-in modules in separate fileAlexey Gladkov2019-05-071-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: When a kernel module is compiled as a separate module, some important information about the kernel module is available via .modinfo section of the module. In contrast, when the kernel module is compiled into the kernel, that information is not available. Information about built-in modules is necessary in the following cases: 1. When it is necessary to find out what additional parameters can be passed to the kernel at boot time. 2. When you need to know which module names and their aliases are in the kernel. This is very useful for creating an initrd image. Proposal: The proposed patch does not remove .modinfo section with module information from the vmlinux at the build time and saves it into a separate file after kernel linking. So, the kernel does not increase in size and no additional information remains in it. Information is stored in the same format as in the separate modules (null-terminated string array). Because the .modinfo section is already exported with a separate modules, we are not creating a new API. It can be easily read in the userspace: $ tr '\0' '\n' < modules.builtin.modinfo ext4.softdep=pre: crc32c ext4.license=GPL ext4.description=Fourth Extended Filesystem ext4.author=Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others ext4.alias=fs-ext4 ext4.alias=ext3 ext4.alias=fs-ext3 ext4.alias=ext2 ext4.alias=fs-ext2 md_mod.alias=block-major-9-* md_mod.alias=md md_mod.description=MD RAID framework md_mod.license=GPL md_mod.parmtype=create_on_open:bool md_mod.parmtype=start_dirty_degraded:int ... Co-Developed-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> Signed-off-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> Signed-off-by: Alexey Gladkov <gladkov.alexey@gmail.com> Acked-by: Jessica Yu <jeyu@kernel.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: move Documentation to vmlinux-alldirsMasahiro Yamada2019-05-031-4/+5
| | | | | | | | | | | | A minor code cleanup. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: move samples/ to KBUILD_VMLINUX_OBJSMasahiro Yamada2019-05-031-10/+8
| | | | | | | | | | | | | | | | | | | | Handle samples/ like the other top-level directories to simplify the Makefile. Include include/config/auto.conf earlier to evaluate drivers-$(CONFIG_SAMPLES). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree buildMasahiro Yamada2019-04-091-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After cross-compiling the kernel, "make mrproper" should be executed with the proper ARCH= option. Otherwise, stale objects will remain under arch/$(SRCARCH)/. One bad scenario is like this: $ make ARCH=arm defconfig all # cross-compile the kernel for arm $ make mrproper # mrproper for host-arch (i.e. x86) $ make ARCH=arm O=build_dir defconfig all If you miss ARCH= for mrproper and cross-compile the kernel with O= and ARCH= options, Kbuild will happily start to build, but may fail due to stale objects in the srctree. If $(srctree)/arch/$(SRCARCH)/include/generated/ exists, let's stop the out-of-tree build. To detect this, mrproper should clean only arch/$(SRCARCH)/include/generated/. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: remove unneeded dependency for include/config/kernel.releaseMasahiro Yamada2019-04-091-1/+1
| | | | | | | | | | | | | | This is unneeded since commit 43fee2b23895 ("kbuild: do not redirect the first prerequisite for filechk"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree buildMasahiro Yamada2019-04-021-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KBUILD_SRC was conventionally used for some different purposes: [1] To remember the source tree path [2] As a flag to check if sub-make is already done [3] As a flag to check if Kbuild runs out of tree For [1], we do not need to remember it because the top Makefile can compute it by $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) [2] has been replaced with self-commenting 'sub_make_done'. For [3], we can distinguish in-tree/out-of-tree by comparing $(srctree) and '.' This commit converts [3] to prepare for the KBUILD_SRC removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: allow Kbuild to start from any directoryMasahiro Yamada2019-04-021-37/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kbuild always runs in the top of the output directory. If Make starts in the source directory with O=, it relocates the working directory to the location specified by O=. Also, users can start build from the output directory by using the Makefile generated by scripts/mkmakefile. With a little more effort, Kbuild will be able to start from any directory path. This commit allows to specify the source directory by using the -f option. For example, you can do: $ cd path/to/output/dir $ make -f path/to/source/dir/Makefile Or, for the equivalent behavior, you can do: $ make O=path/to/output/dir -f path/to/source/dir/Makefile KBUILD_SRC is now deprecated. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kieran Bingham <kbingham@kernel.org>
| * kbuild: pass $(MAKECMDGOALS) to sub-make as isMasahiro Yamada2019-04-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Manipulating $(MAKECMDGOALS) for sub-make seems odd to me. [1] 'make O=foo sub-make' is turned into 'make O=foo', which builds the default targets. It would make sense to terminate the build with: *** No rule to make target 'sub-make'. Stop. [2] 'make O=foo defconfig _all' is turned into 'make O=foo defconfig', which changes the behavior. Let's pass $(MAKECMDGOALS) as is. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: fix warning "overriding recipe for target 'Makefile'"Masahiro Yamada2019-04-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | If you do "make Makefile" with GNU Make 3.x, the following warning is displayed: $ make Makefile Makefile:165: warning: overriding recipe for target 'Makefile' Makefile:51: warning: ignoring old recipe for target 'Makefile' make[1]: Nothing to be done for 'Makefile'. make: Nothing to be done for 'Makefile'. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: move RETPOLINE flags below config-targetsMasahiro Yamada2019-04-011-9/+9
| | | | | | | | | | | | | | | | | | | | When you run a "make *config" target, the retpoline compiler flags are evaluated for nothing because the code is located above the 'ifeq ($(config-targets),1)'. Move it a bit below to avoid unneeded computation in the Kconfig stage. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2019-05-071-1/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull networking updates from David Miller: "Highlights: 1) Support AES128-CCM ciphers in kTLS, from Vakul Garg. 2) Add fib_sync_mem to control the amount of dirty memory we allow to queue up between synchronize RCU calls, from David Ahern. 3) Make flow classifier more lockless, from Vlad Buslov. 4) Add PHY downshift support to aquantia driver, from Heiner Kallweit. 5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces contention on SLAB spinlocks in heavy RPC workloads. 6) Partial GSO offload support in XFRM, from Boris Pismenny. 7) Add fast link down support to ethtool, from Heiner Kallweit. 8) Use siphash for IP ID generator, from Eric Dumazet. 9) Pull nexthops even further out from ipv4/ipv6 routes and FIB entries, from David Ahern. 10) Move skb->xmit_more into a per-cpu variable, from Florian Westphal. 11) Improve eBPF verifier speed and increase maximum program size, from Alexei Starovoitov. 12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit spinlocks. From Neil Brown. 13) Allow tunneling with GUE encap in ipvs, from Jacky Hu. 14) Improve link partner cap detection in generic PHY code, from Heiner Kallweit. 15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan Maguire. 16) Remove SKB list implementation assumptions in SCTP, your's truly. 17) Various cleanups, optimizations, and simplifications in r8169 driver. From Heiner Kallweit. 18) Add memory accounting on TX and RX path of SCTP, from Xin Long. 19) Switch PHY drivers over to use dynamic featue detection, from Heiner Kallweit. 20) Support flow steering without masking in dpaa2-eth, from Ioana Ciocoi. 21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri Pirko. 22) Increase the strict parsing of current and future netlink attributes, also export such policies to userspace. From Johannes Berg. 23) Allow DSA tag drivers to be modular, from Andrew Lunn. 24) Remove legacy DSA probing support, also from Andrew Lunn. 25) Allow ll_temac driver to be used on non-x86 platforms, from Esben Haabendal. 26) Add a generic tracepoint for TX queue timeouts to ease debugging, from Cong Wang. 27) More indirect call optimizations, from Paolo Abeni" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits) cxgb4: Fix error path in cxgb4_init_module net: phy: improve pause mode reporting in phy_print_status dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings net: macb: Change interrupt and napi enable order in open net: ll_temac: Improve error message on error IRQ net/sched: remove block pointer from common offload structure net: ethernet: support of_get_mac_address new ERR_PTR error net: usb: smsc: fix warning reported by kbuild test robot staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check net: dsa: support of_get_mac_address new ERR_PTR error net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats vrf: sit mtu should not be updated when vrf netdev is the link net: dsa: Fix error cleanup path in dsa_init_module l2tp: Fix possible NULL pointer dereference taprio: add null check on sched_nest to avoid potential null pointer dereference net: mvpp2: cls: fix less than zero check on a u32 variable net_sched: sch_fq: handle non connected flows net_sched: sch_fq: do not assume EDT packets are ordered net: hns3: use devm_kcalloc when allocating desc_cb net: hns3: some cleanup for struct hns3_enet_ring ...
| * \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-05-021-2/+2
| |\ \ | | | | | | | | | | | | | | | | | | | | Three trivial overlapping conflicts. Signed-off-by: David S. Miller <davem@davemloft.net>
| * \ \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-04-251-1/+1
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Two easy cases of overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
| * \ \ \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2019-04-171-1/+1
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflict resolution of af_smc.c from Stephen Rothwell. Signed-off-by: David S. Miller <davem@davemloft.net>
| * \ \ \ \ Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller2019-04-111-1/+2
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Daniel Borkmann says: ==================== pull-request: bpf-next 2019-04-12 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Improve BPF verifier scalability for large programs through two optimizations: i) remove verifier states that are not useful in pruning, ii) stop walking parentage chain once first LIVE_READ is seen. Combined gives approx 20x speedup. Increase limits for accepting large programs under root, and add various stress tests, from Alexei. 2) Implement global data support in BPF. This enables static global variables for .data, .rodata and .bss sections to be properly handled which allows for more natural program development. This also opens up the possibility to optimize program workflow by compiling ELFs only once and later only rewriting section data before reload, from Daniel and with test cases and libbpf refactoring from Joe. 3) Add config option to generate BTF type info for vmlinux as part of the kernel build process. DWARF debug info is converted via pahole to BTF. Latter relies on libbpf and makes use of BTF deduplication algorithm which results in 100x savings compared to DWARF data. Resulting .BTF section is typically about 2MB in size, from Andrii. 4) Add BPF verifier support for stack access with variable offset from helpers and add various test cases along with it, from Andrey. 5) Extend bpf_skb_adjust_room() growth BPF helper to mark inner MAC header so that L2 encapsulation can be used for tc tunnels, from Alan. 6) Add support for input __sk_buff context in BPF_PROG_TEST_RUN so that users can define a subset of allowed __sk_buff fields that get fed into the test program, from Stanislav. 7) Add bpf fs multi-dimensional array tests for BTF test suite and fix up various UBSAN warnings in bpftool, from Yonghong. 8) Generate a pkg-config file for libbpf, from Luca. 9) Dump program's BTF id in bpftool, from Prashant. 10) libbpf fix to use smaller BPF log buffer size for AF_XDP's XDP program, from Magnus. 11) kallsyms related fixes for the case when symbols are not present in BPF selftests and samples, from Daniel ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | | | kbuild: add ability to generate BTF type info for vmlinuxAndrii Nakryiko2019-04-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds new config option to trigger generation of BTF type information from DWARF debuginfo for vmlinux and kernel modules through pahole, which in turn relies on libbpf for btf_dedup() algorithm. The intent is to record compact type information of all types used inside kernel, including all the structs/unions/typedefs/etc. This enables BPF's compile-once-run-everywhere ([0]) approach, in which tracing programs that are inspecting kernel's internal data (e.g., struct task_struct) can be compiled on a system running some kernel version, but would be possible to run on other kernel versions (and configurations) without recompilation, even if the layout of structs changed and/or some of the fields were added, removed, or renamed. This is only possible if BPF loader can get kernel type info to adjust all the offsets correctly. This patch is a first time in this direction, making sure that BTF type info is part of Linux kernel image in non-loadable ELF section. BTF deduplication ([1]) algorithm typically provides 100x savings compared to DWARF data, so resulting .BTF section is not big as is typically about 2MB in size. [0] http://vger.kernel.org/lpc-bpf2018.html#session-2 [1] https://facebookmicrosites.github.io/bpf/blog/2018/11/14/btf-enhancement.html Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@fb.com> Cc: Yonghong Song <yhs@fb.com> Cc: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
* | | | | | | Merge tag 'meminit-v5.2-rc1' of ↵Linus Torvalds2019-05-071-0/+5
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull compiler-based variable initialization updates from Kees Cook: "This is effectively part of my gcc-plugins tree, but as this adds some Clang support, it felt weird to still call it "gcc-plugins". :) This consolidates Kconfig for the existing stack variable initialization (via structleak and stackleak gcc plugins) and adds Alexander Potapenko's support for Clang's new similar functionality. Summary: - Consolidate memory initialization Kconfigs (Kees) - Implement support for Clang's stack variable auto-init (Alexander)" * tag 'meminit-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: security: Implement Clang's stack initialization security: Move stackleak config to Kconfig.hardening security: Create "kernel hardening" config area
| * | | | | | | security: Implement Clang's stack initializationKees Cook2019-04-241-0/+5
| | |/ / / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_INIT_STACK_ALL turns on stack initialization based on -ftrivial-auto-var-init in Clang builds, which has greater coverage than CONFIG_GCC_PLUGINS_STRUCTLEAK_BYREF_ALL. -ftrivial-auto-var-init Clang option provides trivial initializers for uninitialized local variables, variable fields and padding. It has three possible values: pattern - uninitialized locals are filled with a fixed pattern (mostly 0xAA on 64-bit platforms, see https://reviews.llvm.org/D54604 for more details, but 0x000000AA for 32-bit pointers) likely to cause crashes when uninitialized value is used; zero (it's still debated whether this flag makes it to the official Clang release) - uninitialized locals are filled with zeroes; uninitialized (default) - uninitialized locals are left intact. This patch uses only the "pattern" mode when CONFIG_INIT_STACK_ALL is enabled. Developers have the possibility to opt-out of this feature on a per-variable basis by using __attribute__((uninitialized)), but such use should be well justified in comments. Co-developed-by: Alexander Potapenko <glider@google.com> Signed-off-by: Alexander Potapenko <glider@google.com> Signed-off-by: Kees Cook <keescook@chromium.org> Tested-by: Alexander Potapenko <glider@google.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2019-05-071-0/+4
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching Pull livepatching updates from Jiri Kosina: - livepatching kselftests improvements from Joe Lawrence and Miroslav Benes - making use of gcc's -flive-patching option when available, from Miroslav Benes - kobject handling cleanups, from Petr Mladek * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: livepatch: Remove duplicated code for early initialization livepatch: Remove custom kobject state handling livepatch: Convert error about unsupported reliable stacktrace into a warning selftests/livepatch: Add functions.sh to TEST_PROGS_EXTENDED kbuild: use -flive-patching when CONFIG_LIVEPATCH is enabled selftests/livepatch: use TEST_PROGS for test scripts
| * | | | | | | kbuild: use -flive-patching when CONFIG_LIVEPATCH is enabledMiroslav Benes2019-04-081-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GCC 9 introduces a new option, -flive-patching. It disables certain optimizations which could make a compilation unsafe for later live patching of the running kernel. The option is used only if CONFIG_LIVEPATCH is enabled and $(CC) supports it. Performance impact of the option was measured on three different Intel machines - two bigger NUMA boxes and one smaller UMA box. Kernel intensive (IO, scheduling, networking) benchmarks were selected, plus a set of HPC workloads from NAS Parallel Benchmark. The tests were done on upstream kernel 5.0-rc8 with openSUSE Leap 15.0 userspace. The majority of the tests is unaffected. The only significant exception is the scheduler section which suffers 1-3% degradation. Evaluated-by: Giovanni Gherdovich <ggherdovich@suse.cz> Signed-off-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
* | | | | | | | Linux 5.1v5.1Linus Torvalds2019-05-051-1/+1
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* | | | | | | gcc-9: silence 'address-of-packed-member' warningLinus Torvalds2019-05-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We already did this for clang, but now gcc has that warning too. Yes, yes, the address may be unaligned. And that's kind of the point. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | | Linux 5.1-rc7v5.1-rc7Linus Torvalds2019-04-281-1/+1
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* | | | | | Linux 5.1-rc6v5.1-rc6Linus Torvalds2019-04-211-1/+1
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* | | | | Linux 5.1-rc5v5.1-rc5Linus Torvalds2019-04-141-1/+1
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* | | | Linux 5.1-rc4v5.1-rc4Linus Torvalds2019-04-071-1/+1
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* | | Linux 5.1-rc3v5.1-rc3Linus Torvalds2019-03-311-1/+1
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* | | Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds2019-03-311-1/+3
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core fixes from Thomas Gleixner: "A small set of core updates: - Make the watchdog respect the selected CPU mask again. That was broken by the rework of the watchdog thread management and caused inconsistent state and NMI watchdog being unstoppable. - Ensure that the objtool build can find the libelf location. - Remove dead kcore stub code" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: watchdog: Respect watchdog cpumask on CPU hotplug objtool: Query pkg-config for libelf location proc/kcore: Remove unused kclist_add_remap()
| * | | objtool: Query pkg-config for libelf locationRolf Eike Beer2019-03-281-1/+3
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | If it is not in the default location, compilation fails at several points. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/91a25e992566a7968fedc89ec80e7f4c83ad0548.1553622500.git.jpoimboe@redhat.com
* | | Merge tag 'kbuild-fixes-v5.1' of ↵Linus Torvalds2019-03-291-20/+23
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Remove harmful -Oz option of Clang - Get back the original behavior (no recursion for in-tree build) for GNU Make 4.x - Some minor fixes for coccinelle patches - Do not overwrite .gitignore in the output directory in case it is version-controlled - Fix missed record-mcount bug for dynamic ftrace - Fix endianness bug in modversions for relative CRC - Cater to '^H' key code in Kconfig ncurses programs * tag 'kbuild-fixes-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig/[mn]conf: handle backspace (^H) key kbuild: modversions: Fix relative CRC byte order interpretation scripts: coccinelle: Fix description of badty.cocci kbuild: strip whitespace in cmd_record_mcount findstring kbuild: do not overwrite .gitignore in output directory kbuild: skip parsing pre sub-make code for recursion coccinelle: put_device: reduce false positives kbuild: skip sub-make for in-tree build with GNU Make 4.x Revert "kbuild: use -Oz instead of -Os when using clang"
| * | kbuild: do not overwrite .gitignore in output directoryMasahiro Yamada2019-03-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 3a51ff344204 ("kbuild: gitignore output directory") seemed to bother people who version-control output directories. Andre Przywara says: "Unfortunately this breaks my setup, because I keep a totally separate git repository in my build directories to track (various versions of) .config. So .gitignore there is carefully crafted to ignore most build artefacts, but not .config, for instance." Link: https://lkml.org/lkml/2019/3/22/1819 Reported-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com>
| * | kbuild: skip parsing pre sub-make code for recursionMasahiro Yamada2019-03-281-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When Make recurses to the top Makefile with sub-make-done unset, the code block surrounded by 'ifneq ($(sub-make-done),1) ... endif' is parsed multiple times. This happens for in-tree building of include/config/auto.conf, *-pkg, etc. with GNU Make 4.x. This is a slight regression by commit 688931a5ad4e ("kbuild: skip sub-make for in-tree build with GNU Make 4.x") in terms of performance since that code block contains one $(shell ...) invocation. Fix it by exporting the variable irrespective of sub-make being run. I renamed it because GNU Make cannot properly export variables containing hyphens. This is probably a bug of GNU Make, and the issue in Kbuild had already been reported by commit 2bfbe7881ee0 ("kbuild: Do not use hyphen in exported variable name"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: skip sub-make for in-tree build with GNU Make 4.xMasahiro Yamada2019-03-211-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 2b50f7ab6368 ("kbuild: add workaround for Debian make-kpkg") annoyed people who want to wrap the top Makefile with GNUmakefile to customize it for their use. On second thought, we do not need to run the sub-make for in-tree build with Make 4.x because the 'MAKEFLAGS += -rR' issue only happens on GNU Make 3.x. With this commit, people will get back their workflow, and the Debian make-kpkg will still work. Fixes: 2b50f7ab6368 ("kbuild: add workaround for Debian make-kpkg") Reported-by: Andreas Schwab <schwab@suse.de> Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Andreas Schwab <schwab@suse.de> Tested-by: David Howells <dhowells@redhat.com>
| * | Revert "kbuild: use -Oz instead of -Os when using clang"Matthias Kaehlcke2019-03-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The clang option -Oz enables *aggressive* optimization for size, which doesn't necessarily result in smaller images, but can have negative impact on performance. Switch back to the less aggressive -Os. This reverts commit 6748cb3c299de1ffbe56733647b01dbcc398c419. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | | Linux 5.1-rc2v5.1-rc2Linus Torvalds2019-03-241-1/+1
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* | Linux 5.1-rc1v5.1-rc1Linus Torvalds2019-03-171-2/+2
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* | kbuild: force all architectures except um to include mandatory-yMasahiro Yamada2019-03-171-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes the common Kbuild.asm file. Factor out the duplicated include directives to scripts/Makefile.asm-generic so that no architecture would opt out of the mandatory-y mechanism. um is not forced to include mandatory-y since it is a very exceptional case which does not support UAPI. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | kbuild: Make NOSTDINC_FLAGS a simply expanded variableDouglas Anderson2019-03-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During a simple no-op (nothing changed) build I saw 39 invocations of the C compiler with the argument "-print-file-name=include". We don't need to call the C compiler 39 times for this--one time will suffice. Let's change NOSTDINC_FLAGS to a simply expanded variable to avoid this since there doesn't appear to be any reason it should be recursively expanded. On my build this shaved ~400 ms off my "no-op" build. Note that the recursive expansion seems to date back to the (really old) commit e8f5bdb02ce0 ("[PATCH] Makefile include path ordering"). It's a little unclear to me if the point of that patch was to switch the variable to be recursively expanded (which it did) or to avoid directly assigning to NOSTDINC_FLAGS (AKA to switch to +=) because someone else (out of tree?) was setting it. I presume later since if the only goal was to switch to recursive expansion the patch would have just removed the ":". Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | kbuild: add workaround for Debian make-kpkgMasahiro Yamada2019-03-141-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 3812b8c5c5d5 ("kbuild: make -r/-R effective in top Makefile for old Make versions"), make-kpkg is not working. make-kpkg directly includes the top Makefile of Linux kernel, and appends some debian_* targets. /usr/share/kernel-package/ruleset/kernel_version.mk: # Include the kernel makefile override dot-config := 1 include Makefile dot-config := 1 I did not know the kernel Makefile was used in that way, and it is hard to guarantee the behavior when the kernel Makefile is included by another Makefile from a different project. It looks like Debian Stretch stopped providing make-kpkg. Maybe it is obsolete and being replaced with 'make deb-pkg' etc. but still widely used. This commit adds a workaround; if the top Makefile is included by another Makefile, skip sub-make in order to make the main part visible. 'MAKEFLAGS += -rR' does not become effective for GNU Make < 4.0, but Debian/Ubuntu is already using newer versions. The effect of this commit: Debian 8 (Jessie) : Fixed Debian 9 (Stretch) : make-kpkg (kernel-package) is not provided Ubuntu 14.04 LTS : NOT Fixed Ubuntu 16.04 LTS : Fixed Ubuntu 18.04 LTS : Fixed This commit cannot fix Ubuntu 14.04 because it installs GNU Make 3.81, but its support will end in Apr 2019, which is before the Linux v5.1 release. I added warning so that nobody would try to include the top Makefile. Fixes: 3812b8c5c5d5 ("kbuild: make -r/-R effective in top Makefile for old Make versions") Reported-by: Liz Zhang <lizzha@microsoft.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Lili Deng <v-lide@microsoft.com> Cc: Manoj Srivastava <srivasta@debian.org>
* | Merge tag 'kbuild-v5.1' of ↵Linus Torvalds2019-03-101-114/+105
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - do not generate unneeded top-level built-in.a - let git ignore O= directory entirely - optimize scripts/kallsyms slightly - exclude DWARF info from *.s regardless of config options - fix GCC toolchain search path for Clang to prepare ld.lld support - do not generate modules.order when CONFIG_MODULES is disabled - simplify single target rules and remove VPATH for external module build - allow to add optional flags to dpkg-buildpackage when building deb-pkg - move some compiler option tests from Makefile to Kconfig - various Makefile cleanups * tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits) kbuild: remove scripts/basic/% build target kbuild: use -Werror=implicit-... instead of -Werror-implicit-... kbuild: clean up scripts/gcc-version.sh kbuild: remove cc-version macro kbuild: update comment block of scripts/clang-version.sh kbuild: remove commented-out INITRD_COMPRESS kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig kbuild: [bin]deb-pkg: add DPKG_FLAGS variable kbuild: move ".config not found!" message from Kconfig to Makefile kbuild: invoke syncconfig if include/config/auto.conf.cmd is missing kbuild: simplify single target rules kbuild: remove empty rules for makefiles kbuild: make -r/-R effective in top Makefile for old Make versions kbuild: move tools_silent to a more relevant place kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig kbuild: refactor cc-cross-prefix implementation kbuild: hardcode genksyms path and remove GENKSYMS variable scripts/gdb: refactor rules for symlink creation kbuild: create symlink to vmlinux-gdb.py in scripts_gdb target scripts/gdb: do not descend into scripts/gdb from scripts ...
| * | kbuild: remove scripts/basic/% build targetMasahiro Yamada2019-03-051-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This build rule was introduced by commit cd05e6bdc600 ("[PATCH] kbuild: fix split-include dependency") to handle the dependency of scripts/basic/split-include. Now, fixdep is the only tool in scripts/basic/, and this rule is no longer used. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: use -Werror=implicit-... instead of -Werror-implicit-...Luc Van Oostenryck2019-03-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flag '-Werror-implicit-function-declaration', present in GCC 2.95, stopped to be documented in GCC 4.3, replaced by the more generic '-Werror=...' form. So, use the equivalent '-Werror=implicit-function-declaration' instead. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: remove commented-out INITRD_COMPRESSMasahiro Yamada2019-03-041-13/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | This code has been commented out since commit b7000adef17a ("Don't set the INITRD_COMPRESS environment variable automatically"). Clean it up now. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to KconfigMasahiro Yamada2019-02-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_DEBUG_INFO_SPLIT and CONFIG_DEBUG_INFO_DWARF4 enable extra dwarf options if supported. You never know if they are really enabled since Makefile may silently turn them off. The actual behavior will match to the kernel configuration by testing those compiler flags in the Kconfig stage. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: move ".config not found!" message from Kconfig to MakefileMasahiro Yamada2019-02-271-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you run "make" in a pristine source tree, currently Kbuild will start to build Kconfig to let it show the error message. It would be more straightforward to check it in Makefile and let it fail immediately. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: invoke syncconfig if include/config/auto.conf.cmd is missingMasahiro Yamada2019-02-271-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If include/config/auto.conf.cmd is lost for some reasons, it is not self-healing, so the top Makefile misses to run syncconfig. Move include/config/auto.conf.cmd to the target side. I used a pattern rule instead of a normal rule here although it is a bit gross. If the rule were written with a normal rule like this, include/config/auto.conf \ include/config/auto.conf.cmd \ include/config/tristate.conf: $(KCONFIG_CONFIG) $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig ... syncconfig would be executed per target. Using a pattern rule makes sure that syncconfig is executed just once because Make assumes the recipe will create all of the targets. Here is a quote from the GNU Make manual [1]: "Pattern rules may have more than one target. Unlike normal rules, this does not act as many different rules with the same prerequisites and recipe. If a pattern rule has multiple targets, make knows that the rule's recipe is responsible for making all of the targets. The recipe is executed only once to make all the targets. When searching for a pattern rule to match a target, the target patterns of a rule other than the one that matches the target in need of a rule are incidental: make worries only about giving a recipe and prerequisites to the file presently in question. However, when this file's recipe is run, the other targets are marked as having been updated themselves." [1]: https://www.gnu.org/software/make/manual/html_node/Pattern-Intro.html Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: simplify single target rulesMasahiro Yamada2019-02-271-29/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dependency will be checked anyway after Kbuild descends into a sub-directory. Skip object/source dependency checks in top Makefile. VPATH can be simpler since the top Makefile no longer checks the presence of the source file, which is located in in the external module directory. One good thing is, it can compile an object from a generated source file. $ make crypto/rsapubkey.asn1.o ... ASN.1 crypto/rsapubkey.asn1.c CC crypto/rsapubkey.asn1.o Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: remove empty rules for makefilesMasahiro Yamada2019-02-271-8/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The previous commit made 'MAKEFLAGS += -rR' effective in the top Makefile regardless of O= option, GNU Make versions. The top Makefile does not need to cancel implicit rules for makefiles. There is still one place where an empty rule is useful. Since -rR is effective only after sub-make, GNU Make would try implicit rules to update the top Makefile. Although it is not a big overhead, cancel it just in case. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | kbuild: make -r/-R effective in top Makefile for old Make versionsMasahiro Yamada2019-02-271-22/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding -rR to MAKEFLAGS is important because we do not want to be bothered by built-in implicit rules or variables. One problem that used to exist in older GNU Make versions is MAKEFLAGS += -rR ... does not become effective in the current Makefile. When you are building with O= option, it becomes effective in the top Makefile since it recurses via 'sub-make' target. Otherwise, the top Makefile tries implicit rules. That is why we explicitly add empty rules for Makefiles, but we often miss to do that. In fact, adding -d option to older GNU Make versions shows it is trying a bunch of implicit pattern rules. Considering target file `scripts/Makefile.kcov'. Looking for an implicit rule for `scripts/Makefile.kcov'. Trying pattern rule with stem `Makefile.kcov'. Trying implicit prerequisite `scripts/Makefile.kcov.o'. Trying pattern rule with stem `Makefile.kcov'. Trying implicit prerequisite `scripts/Makefile.kcov.c'. Trying pattern rule with stem `Makefile.kcov'. Trying implicit prerequisite `scripts/Makefile.kcov.cc'. Trying pattern rule with stem `Makefile.kcov'. Trying implicit prerequisite `scripts/Makefile.kcov.C'. ... This issue was fixed by GNU Make commit 58dae243526b ("[Savannah #20501] Handle adding -r/-R to MAKEFLAGS in the makefile"). So, it is no longer a problem if you use GNU Make 4.0 or later. However, older versions are still widely used. So, I decided to patch the kernel Makefile to invoke sub-make regardless of O= option. This will allow further cleanups. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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