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2018-06-05kbuild: Move last word of nconfig help to the previous linePetr Vorel1-2/+1
Signed-off-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-06-05kconfig: Add testconfig into make help outputPetr Vorel1-0/+1
Signed-off-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-06-04Merge tag 'docs-4.18' of git://git.lwn.net/linuxLinus Torvalds2-12/+397
Pull documentation updates from Jonathan Corbet: "There's been a fair amount of work in the docs tree this time around, including: - Extensive RST conversions and organizational work in the memory-management docs thanks to Mike Rapoport. - An update of Documentation/features from Andrea Parri and a script to keep it updated. - Various LICENSES updates from Thomas, along with a script to check SPDX tags. - Work to fix dangling references to documentation files; this involved a fair number of one-liner comment changes outside of Documentation/ ... and the usual list of documentation improvements, typo fixes, etc" * tag 'docs-4.18' of git://git.lwn.net/linux: (103 commits) Documentation: document hung_task_panic kernel parameter docs/admin-guide/mm: add high level concepts overview docs/vm: move ksm and transhuge from "user" to "internals" section. docs: Use the kerneldoc comments for memalloc_no*() doc: document scope NOFS, NOIO APIs docs: update kernel versions and dates in tables docs/vm: transhuge: split userspace bits to admin-guide/mm/transhuge docs/vm: transhuge: minor updates docs/vm: transhuge: change sections order Documentation: arm: clean up Marvell Berlin family info Documentation: gpio: driver: Fix a typo and some odd grammar docs: ranoops.rst: fix location of ramoops.txt scripts/documentation-file-ref-check: rewrite it in perl with auto-fix mode docs: uio-howto.rst: use a code block to solve a warning mm, THP, doc: Add document for thp_swpout/thp_swpout_fallback w1: w1_io.c: fix a kernel-doc warning Documentation/process/posting: wrap text at 80 cols docs: admin-guide: add cgroup-v2 documentation Revert "Documentation/features/vm: Remove arch support status file for 'pte_special'" Documentation: refcount-vs-atomic: Update reference to LKMM doc. ...
2018-06-01powerpc/kbuild: Use flags variables rather than overriding LD/CC/ASNicholas Piggin1-1/+17
The powerpc toolchain can compile combinations of 32/64 bit and big/little endian, so it's convenient to consider, e.g., `CC -m64 -mbig-endian` To be the C compiler for the purpose of invoking it to build target artifacts. So overriding the CC variable to include these flags works for this purpose. Unfortunately that is not compatible with the way the proposed new Kconfig macro language will work. After previous patches in this series, these flags can be carefully passed in using flags instead. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-05-29scripts: Fixed printf format mismatchnixiaoming3-3/+3
scripts/kallsyms.c: function write_src: "printf", the #1 format specifier "d" need arg type "int", but the according arg "table_cnt" has type "unsigned int" scripts/recordmcount.c: function do_file: "fprintf", the #1 format specifier "d" need arg type "int", but the according arg "(*w2)(ehdr->e_machine)" has type "unsigned int" scripts/recordmcount.h: function find_secsym_ndx: "fprintf", the #1 format specifier "d" need arg type "int", but the according arg "txtndx" has type "unsigned int" Signed-off-by: nixiaoming <nixiaoming@huawei.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: add basic helper macros to scripts/Kconfig.includeMasahiro Yamada1-0/+27
Kconfig got text processing tools like we see in Make. Add Kconfig helper macros to scripts/Kconfig.include like we collect Makefile macros in scripts/Kbuild.include. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-05-29kconfig: test: add Kconfig macro language testsMasahiro Yamada13-0/+191
Here are the test cases I used for developing the text expansion feature. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: error out if a recursive variable references itselfMasahiro Yamada1-0/+13
When using a recursively expanded variable, it is a common mistake to make circular reference. For example, Make terminates the following code: X = $(X) Y := $(X) Let's detect the circular expansion in Kconfig, too. On the other hand, a function that recurses itself is a commonly-used programming technique. So, Make does not check recursion in the reference with 'call'. For example, the following code continues running eternally: X = $(call X) Y := $(X) Kconfig allows circular expansion if one or more arguments are given, but terminates when the same function is recursively invoked 1000 times, assuming it is a programming mistake. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: add 'filename' and 'lineno' built-in variablesMasahiro Yamada1-0/+16
The special variables, $(filename) and $(lineno), are expanded to a file name and its line number being parsed, respectively. Suggested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org>
2018-05-29kconfig: add 'info', 'warning-if', and 'error-if' built-in functionsMasahiro Yamada1-0/+27
Syntax: $(info,<text>) $(warning-if,<condition>,<text>) $(error-if,<condition>,<text) The 'info' function prints a message to stdout as in Make. The 'warning-if' and 'error-if' are similar to 'warning' and 'error' in Make, but take the condition parameter. They are effective only when the <condition> part is y. Kconfig does not implement the lazy expansion as used in the 'if' 'and, 'or' functions in Make. In other words, Kconfig does not support conditional expansion. The unconditional 'error' function would always terminate the parsing, hence would be useless in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org>
2018-05-29kconfig: expand lefthand side of assignment statementMasahiro Yamada1-0/+7
Make expands the lefthand side of assignment statements. In fact, Kbuild relies on it since kernel makefiles mostly look like this: obj-$(CONFIG_FOO) += foo.o Do likewise in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: support append assignment operatorMasahiro Yamada3-3/+27
Support += operator. This appends a space and the text on the righthand side to a variable. The timing of the evaluation of the righthand side depends on the flavor of the variable. If the lefthand side was originally defined as a simple variable, the righthand side is expanded immediately. Otherwise, the expansion is deferred. Appending something to an undefined variable results in a recursive variable. To implement this, we need to remember the flavor of variables. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: support simply expanded variableMasahiro Yamada4-7/+27
The previous commit added variable and user-defined function. They work similarly in the sense that the evaluation is deferred until they are used. This commit adds another type of variable, simply expanded variable, as we see in Make. The := operator defines a simply expanded variable, expanding the righthand side immediately. This works like traditional programming language variables. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: support user-defined function and recursively expanded variableMasahiro Yamada4-4/+120
Now, we got a basic ability to test compiler capability in Kconfig. config CC_HAS_STACKPROTECTOR def_bool $(shell,($(CC) -Werror -fstack-protector -E -x c /dev/null -o /dev/null 2>/dev/null) && echo y || echo n) This works, but it is ugly to repeat this long boilerplate. We want to describe like this: config CC_HAS_STACKPROTECTOR bool default $(cc-option,-fstack-protector) It is straight-forward to add a new function, but I do not like to hard-code specialized functions like that. Hence, here is another feature, user-defined function. This works as a textual shorthand with parameterization. A user-defined function is defined by using the = operator, and can be referenced in the same way as built-in functions. A user-defined function in Make is referenced like $(call my-func,arg1,arg2), but I omitted the 'call' to make the syntax shorter. The definition of a user-defined function contains $(1), $(2), etc. in its body to reference the parameters. It is grammatically valid to pass more or fewer arguments when calling it. We already exploit this feature in our makefiles; scripts/Kbuild.include defines cc-option which takes two arguments at most, but most of the callers pass only one argument. By the way, a variable is supported as a subset of this feature since a variable is "a user-defined function with zero argument". In this context, I mean "variable" as recursively expanded variable. I will add a different flavored variable in the next commit. The code above can be written as follows: [Example Code] success = $(shell,($(1)) >/dev/null 2>&1 && echo y || echo n) cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) config CC_HAS_STACKPROTECTOR def_bool $(cc-option,-fstack-protector) [Result] $ make -s alldefconfig && tail -n 1 .config CONFIG_CC_HAS_STACKPROTECTOR=y Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: begin PARAM state only when seeing a command keywordMasahiro Yamada1-1/+1
Currently, any statement line starts with a keyword with TF_COMMAND flag. So, the following three lines are dead code. alloc_string(yytext, yyleng); zconflval.string = text; return T_WORD; If a T_WORD token is returned in this context, it will cause syntax error in the parser anyway. The next commit will support the assignment statement where a line starts with an arbitrary identifier. So, I want the lexer to switch to the PARAM state only when it sees a command keyword. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: add 'shell' built-in functionMasahiro Yamada1-0/+41
This accepts a single command to execute. It returns the standard output from it. [Example code] config HELLO string default "$(shell,echo hello world)" config Y def_bool $(shell,echo y) [Result] $ make -s alldefconfig && tail -n 2 .config CONFIG_HELLO="hello world" CONFIG_Y=y Caveat: Like environments, functions are expanded in the lexer. You cannot pass symbols to function arguments. This is a limitation to simplify the implementation. I want to avoid the dynamic function evaluation, which would introduce much more complexity. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: add built-in function supportMasahiro Yamada1-12/+130
This commit adds a new concept 'function' to do more text processing in Kconfig. A function call looks like this: $(function,arg1,arg2,arg3,...) This commit adds the basic infrastructure to expand functions. Change the text expansion helpers to take arguments. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: make default prompt of mainmenu less specificMasahiro Yamada2-2/+2
If "mainmenu" is not specified, "Linux Kernel Configuration" is used as a default prompt. Given that Kconfig is used in other projects than Linux, let's use a more generic prompt, "Main menu". Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29kconfig: remove sym_expand_string_value()Masahiro Yamada2-54/+0
There is no more caller of sym_expand_string_value(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org>
2018-05-29kconfig: remove string expansion for mainmenu after yyparse()Masahiro Yamada1-19/+5
Now that environments are expanded in the lexer, conf_parse() does not need to expand them explicitly. The hack introduced by commit 0724a7c32a54 ("kconfig: Don't leak main menus during parsing") can go away. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-05-29kconfig: remove string expansion in file_lookup()Masahiro Yamada1-3/+1
There are two callers of file_lookup(), but there is no more reason to expand the given path. [1] zconf_initscan() This is used to open the first Kconfig. sym_expand_string_value() has never been used in a useful way here; before opening the first Kconfig file, obviously there is no symbol to expand. If you use expand_string_value() instead, environments in KBUILD_KCONFIG would be expanded, but I do not see practical benefits for that. [2] zconf_nextfile() This is used to open the next file from 'source' statement. Symbols in the path like "arch/$SRCARCH/Kconfig" needed expanding, but it was replaced with the direct environment expansion. The environment has already been expanded before the token is passed to the parser. By the way, file_lookup() was already buggy; it expanded a given path, but it used the path before expansion for look-up: if (!strcmp(name, file->name)) { Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-05-29kconfig: reference environment variables directly and remove 'option env='Masahiro Yamada10-114/+326
To get access to environment variables, Kconfig needs to define a symbol using "option env=" syntax. It is tedious to add a symbol entry for each environment variable given that we need to define much more such as 'CC', 'AS', 'srctree' etc. to evaluate the compiler capability in Kconfig. Adding '$' for symbol references is grammatically inconsistent. Looking at the code, the symbols prefixed with 'S' are expanded by: - conf_expand_value() This is used to expand 'arch/$ARCH/defconfig' and 'defconfig_list' - sym_expand_string_value() This is used to expand strings in 'source' and 'mainmenu' All of them are fixed values independent of user configuration. So, they can be changed into the direct expansion instead of symbols. This change makes the code much cleaner. The bounce symbols 'SRCARCH', 'ARCH', 'SUBARCH', 'KERNELVERSION' are gone. sym_init() hard-coding 'UNAME_RELEASE' is also gone. 'UNAME_RELEASE' should be replaced with an environment variable. ARCH_DEFCONFIG is a normal symbol, so it should be simply referenced without '$' prefix. The new syntax is addicted by Make. The variable reference needs parentheses, like $(FOO), but you can omit them for single-letter variables, like $F. Yet, in Makefiles, people tend to use the parenthetical form for consistency / clarification. At this moment, only the environment variable is supported, but I will extend the concept of 'variable' later on. The variables are expanded in the lexer so we can simplify the token handling on the parser side. For example, the following code works. [Example code] config MY_TOOLCHAIN_LIST string default "My tools: CC=$(CC), AS=$(AS), CPP=$(CPP)" [Result] $ make -s alldefconfig && tail -n 1 .config CONFIG_MY_TOOLCHAIN_LIST="My tools: CC=gcc, AS=as, CPP=gcc -E" Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org>
2018-05-29kbuild: remove kbuild cacheMasahiro Yamada1-87/+14
The kbuild cache was introduced to remember the result of shell commands, some of which are expensive to compute, such as $(call cc-option,...). However, this turned out not so clever as I had first expected. Actually, it is problematic. For example, "$(CC) -print-file-name" is cached. If the compiler is updated, the stale search path causes build error, which is difficult to figure out. Another problem scenario is cache files could be touched while install targets are running under the root permission. We can patch them if desired, but the build infrastructure is getting uglier and uglier. Now, we are going to move compiler flag tests to the configuration phase. If this is completed, the result of compiler tests will be naturally cached in the .config file. We will not have performance issues of incremental building since this testing only happens at Kconfig time. To start this work with a cleaner code base, remove the kbuild cache first. Revert the following commits: Commit 9a234a2e3843 ("kbuild: create directory for make cache only when necessary") Commit e17c400ae194 ("kbuild: shrink .cache.mk when it exceeds 1000 lines") Commit 4e56207130ed ("kbuild: Cache a few more calls to the compiler") Commit 3298b690b21c ("kbuild: Add a cache for generated variables") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.org>
2018-05-28trace: Use -mcount-record for dynamic ftraceAndi Kleen1-0/+6
gcc 5 supports a new -mcount-record option to generate ftrace tables directly. This avoids the need to run record_mcount manually. Use this option when available. So far doesn't use -mcount-nop, which also exists now. This is needed to make ftrace work with LTO because the normal record-mcount script doesn't run over the link time output. It should also improve build times slightly in the general case. Link: http://lkml.kernel.org/r/20171127213423.27218-12-andi@firstfloor.org Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-05-28kconfig: drop localization supportSam Ravnborg21-610/+258
The localization support is broken and appears unused. There is no google hits on the update-po-config target. And there is no recent (5 years) activity related to the localization. So lets just drop this as it is no longer used. Suggested-by: Ulf Magnusson <ulfalizer@gmail.com> Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-28kconfig: refactor ncurses package checks for building mconf and nconfMasahiro Yamada5-128/+113
The mconf (or its infrastructure, lxdiaglog) depends on the ncurses. Move and rename check-lxdialog.sh to mconf-cfg.sh to make it work in the same way as for qconf and gconf. This commit fixes some more weirdnesses. The nconf also needs ncurses packages. HOSTLOADLIBES_nconf is set to the libraries needed for nconf, but the cflags is not explicitly set. Actually, nconf relies on the check-lxdialog.sh for the proper cflags: HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) \ -DLOCALE The code above passes the ncurses flags to all objects, even for conf, qconf, gconf. Let's pass the ncurses flags only to mconf and nconf. Currently, the presence of ncurses is not checked for nconf. Let's show a prompt like the mconf case. According to Randy's report, the shell scripts still need to carry the fallback code in case the pkg-config fails to find the ncurses packages. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-28kconfig: refactor GTK+ package checks for building gconfMasahiro Yamada2-34/+32
Refactor the package checks for gconf in the same way as for qconf. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-28kconfig: refactor Qt package checks for building qconfMasahiro Yamada2-45/+53
Currently, the necessary package checks for building qconf is surrounded by ifeq ($(MAKECMDGOALS),xconfig) ... endif. Then, Make will restart when .tmp_qtcheck is generated. To simplify the Makefile, move the scripting to a separate file, and use filechk. The shell script is executed everytime xconfig is run, but it is not a costly script. In the old code, 'pkg-config --exists' only checked Qt5Core / QtCore, but the set of necessary packages should be checked. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-28kbuild: do not display CHK for filechkMasahiro Yamada1-1/+0
filechk displays two short logs; CHK for creating a temporary file, and UPD for really updating the target. IMHO, the build system can be quiet when the target file has not been updated. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
Lots of easy overlapping changes in the confict resolutions here. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-25checkpatch: fix macro argument precedence testJoe Perches1-1/+1
checkpatch's macro argument precedence test is broken so fix it. Link: http://lkml.kernel.org/r/5dd900e9197febc1995604bb33c23c136d8b33ce.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-05-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller1-4/+4
Alexei Starovoitov says: ==================== pull-request: bpf-next 2018-05-24 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Björn Töpel cleans up AF_XDP (removes rebind, explicit cache alignment from uapi, etc). 2) David Ahern adds mtu checks to bpf_ipv{4,6}_fib_lookup() helpers. 3) Jesper Dangaard Brouer adds bulking support to ndo_xdp_xmit. 4) Jiong Wang adds support for indirect and arithmetic shifts to NFP 5) Martin KaFai Lau cleans up BTF uapi and makes the btf_header extensible. 6) Mathieu Xhonneux adds an End.BPF action to seg6local with BPF helpers allowing to edit/grow/shrink a SRH and apply on a packet generic SRv6 actions. 7) Sandipan Das adds support for bpf2bpf function calls in ppc64 JIT. 8) Yonghong Song adds BPF_TASK_FD_QUERY command for introspection of tracing events. 9) other misc fixes from Gustavo A. R. Silva, Sirio Balmelli, John Fastabend, and Magnus Karlsson ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-22scripts/tags.sh: use `find` for $ALLSOURCE_ARCHS generationJoey Pabalinas1-10/+1
The current code includes 'Kconfig' in ALLSOURCE_ARCHS, but it should not (Kconfig is not an architecture). Replace this with a find-generated string and directly assign it to $ALLSOURCE_ARCHS. The find_all_archs() function is no longer needed for a one-liner with obvious semantics, so inline the arch generation into the surrounding conditional. Signed-off-by: Joey Pabalinas <joeypabalinas@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-22coccinelle: deref_null: improve performanceJulia Lawall1-20/+20
Move rules looking for some special cases of safe dereferences before the collection of NULL-tested values. The special cases are fairly rare, but somewhat costly to find, because isomorphisms create many variants of the rules. There is thus no need to search for them over and over for each NULL tested expression. Collecting them just once is sufficient and more efficient. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-22coccinelle: mini_lock: improve performanceJulia Lawall1-2/+4
Replace <+... ...+> by ... when any. <+... ...+> is slow, and in some obscure cases involving backward jumps it doesn't force the unlock to actually come after the end of the if. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+4
S390 bpf_jit.S is removed in net-next and had changes in 'net', since that code isn't used any more take the removal. TLS data structures split the TX and RX components in 'net-next', put the new struct members from the bug fix in 'net' into the RX part. The 'net-next' tree had some reworking of how the ERSPAN code works in the GRE tunneling code, overlapping with a one-line headroom calculation fix in 'net'. Overlapping changes in __sock_map_ctx_update_elem(), keep the bits that read the prog members via READ_ONCE() into local variables before using them. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18Merge drm-fixes-for-v4.17-rc6-urgent into drm-nextDave Airlie8-18/+13
Need to backmerge some nouveau fixes to reduce the nouveau -next conflicts a lot. Signed-off-by: Dave Airlie <airlied@redhat.com>
2018-05-17bpf: change eBPF helper doc parsing script to allow for smaller indentQuentin Monnet1-4/+4
Documentation for eBPF helpers can be parsed from bpf.h and eventually turned into a man page. Commit 6f96674dbd8c ("bpf: relax constraints on formatting for eBPF helper documentation") changed the script used to parse it, in order to allow for different indent style and to ease the work for writing documentation for future helpers. The script currently considers that the first tab can be replaced by 6 to 8 spaces. But the documentation for bpf_fib_lookup() uses a mix of tabs (for the "Description" part) and of spaces ("Return" part), and only has 5 space long indent for the latter. We probably do not want to change the values accepted by the script each time a new helper gets a new indent style. However, it is worth noting that with those 5 spaces, the "Description" and "Return" part *look* aligned in the generated patch and in `git show`, so it is likely other helper authors will use the same length. Therefore, allow for helper documentation to use 5 spaces only for the first indent level. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-17modpost: constify *modname function argument where possibleMasahiro Yamada1-2/+2
Neither find_module() nor read_symbols() does change *modname. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-17modpost: remove redundant is_vmlinux() testMasahiro Yamada1-2/+1
The second test of is_vmlinux() is redundant. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-17modpost: use strstarts() helper more widelyMasahiro Yamada1-21/+18
Currently, strstarts() is only used in export_from_secname(). Use it more widely to improve the code readability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-17modpost: pass struct elf_info pointer to get_modinfo()Masahiro Yamada1-13/+12
get_(next_)modinfo takes a pointer and length pair of the .modinfo section. Instead, pass struct elf_info pointer to reduce the number of function arguments. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-17checkpatch: remove VMLINUX_SYMBOL() checkMasahiro Yamada1-10/+0
Now that VMLINUX_SYMBOL() is no-op and being removed, let's stop checking VMLINUX_SYMBOL(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17kbuild: remove CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIXMasahiro Yamada2-9/+1
CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX. Clean up the rest of scripts, and remove the Kconfig entry. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17depmod.sh: remove symbol prefix supportMasahiro Yamada1-22/+3
CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX, hence the last argument of scripts/depmod.sh can be removed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17kallsyms: remove symbol prefix supportMasahiro Yamada2-40/+11
CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX, hence the --symbol-prefix option is unnecessary. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17genksyms: remove symbol prefix supportMasahiro Yamada2-10/+3
CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX, hence the -s (--symbol-prefix) option is unnecessary. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17modpost: remove symbol prefix supportMasahiro Yamada1-20/+10
CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX, hence VMLINUX_SYMBOL_STR(foo) can be simplify replaced with "foo". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
2018-05-17kbuild: deb-pkg improve maintainer address generationRiku Voipio1-14/+13
There is multiple issues with the genaration of maintainer string It uses DEBEMAIL and EMAIL enviroment variables, which may contain angle brackets, creating invalid maintainer strings. The documented KBUILD_BUILD_USER and KBUILD_BUILD_HOST variables are not used. Undocumented and uncommon NAME variable is used. Refactor the Maintainer string to: - use EMAIL or DEBEMAIL directly if they are in form "name <user@host>" - use KBUILD_BUILD_USER and KBUILD_BUILD_HOST if set before falling back to autodetection - no longer use NAME variable or the useless Anonymous string The logic is switched from multiline if/then/fi statements to compact shell variable substition commands. Reported-by: Mathieu Malaterre <malat@debian.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-14kbuild: disable new dtc graph and unit-address warningsRob Herring1-0/+3
dtc gained some new warnings for OF graphs and unique unit addresses, but they are currently much too noisy. So turn off 'graph_child_address', 'graph_port', and 'unique_unit_address' warnings by default. They can be enabled by building dtbs with W=1. Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org>