Changes in Kbuild

80f2e4cd - MIPS: Share generic kernel code with other architecture

Fri, 16 Feb 2024 17:42:21 +0000

MIPS: Share generic kernel code with other architectureSome architectures might seek to utilize a significant portion of thegeneric kernel code while maintaining independence from the generickernel due to specific peculiarities.This patch allows for the reuse of core code, preventing unnecessaryduplication.Suggested-by: Thomas Bogendoerfer Reviewed-by: Jiaxun Yang Signed-off-by: Gregory CLEMENT Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Kbuild

0f0d2871 - arch: turn off -Werror for architectures with known warnings

Thu, 30 Nov 2023 08:07:38 +0000

arch: turn off -Werror for architectures with known warningsA couple of architectures enable -Werror for their own files regardless ofCONFIG_WERROR but also have known warnings that fail the build with-Wmissing-prototypes enabled by default:arch/alpha/lib/memcpy.c:153:8: error: no previous prototype for 'memcpy' [-Werror=missing-prototypes]arch/alpha/kernel/irq.c:96:1: error: no previous prototype for 'handle_irq' [-Werror=missing-prototypes]arch/mips/kernel/signal.c:673:17: error: no previous prototype for ‘sys_rt_sigreturn’ [-Werror=missing-prototypes]arch/mips/kernel/signal.c:636:17: error: no previous prototype for ‘sys_sigreturn’ [-Werror=missing-prototypes]arch/mips/kernel/syscall.c:51:16: error: no previous prototype for ‘sysm_pipe’ [-Werror=missing-prototypes]arch/mips/mm/fault.c:323:17: error: no previous prototype for ‘do_page_fault’ [-Werror=missing-prototypes]arch/sparc/vdso/vma.c:246:12: warning: no previous prototype for ‘init_vdso_image’ [-Wmissing-prototypes]varch/sparc/vdso/vdso32/../vclock_gettime.c:343:1: warning: no previous prototype for ‘__vdso_gettimeofday_stick’ [-Wmissing-prototypes]arch/sparc/vdso/vclock_gettime.c:343:1: warning: no previous prototype for ‘__vdso_gettimeofday_stick’ [-Wmissing-prototypes]arch/sparc/prom/p1275.c:52:6: warning: no previous prototype for ‘prom_cif_init’ [-Wmissing-prototypes]arch/sparc/prom/misc_64.c:165:5: warning: no previous prototype for ‘prom_get_mmu_ihandle’ [-Wmissing-prototypes]This appears to be an artifact from the times when this architecture codewas better maintained that most device drivers and before CONFIG_WERRORwas added. Now it just gets in the way, so remove all of these.Powerpc and x86 both still have their own Kconfig options to enable-Werror for some of their files. These architectures are bettermaintained than most and the options are easy to disable, so leave thoseuntouched.Link: https://lkml.kernel.org/r/4be73872-c1f5-4c31-8201-712c19290a22@app.fastmail.comSigned-off-by: Arnd Bergmann Reported-by: Stephen Rothwell Cc: "David S. Miller" Cc: Thomas Bogendoerfer Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/mips/Kbuild

67d7c302 - kbuild: remove --include-dir MAKEFLAG from top Makefile

Sat, 28 Jan 2023 09:24:23 +0000

kbuild: remove --include-dir MAKEFLAG from top MakefileI added $(srctree)/ to some included Makefiles in the following commits: - 3204a7fb98a3 ("kbuild: prefix $(srctree)/ to some included Makefiles") - d82856395505 ("kbuild: do not require sub-make for separate output tree builds")They were a preparation for removing --include-dir flag.I have never thought --include-dir useful. Rather, it _is_ harmful.For example, run the following commands: $ make -s ARCH=x86 mrproper defconfig $ make ARCH=arm O=foo dtbs make[1]: Entering directory '/tmp/linux/foo' HOSTCC scripts/basic/fixdep Error: kernelrelease not valid - run 'make prepare' to update it UPD include/config/kernel.release make[1]: Leaving directory '/tmp/linux/foo'The first command configures the source tree for x86. The next commandtries to build ARM device trees in the separate foo/ directory - thismust stop because the directory foo/ has not been configured yet.However, due to --include-dir=$(abs_srctree), the top Makefile includesthe wrong include/config/auto.conf from the source tree and continuesbuilding. Kbuild traverses the directory tree, but of course it doesnot work correctly. The Error message is also pointless - 'make prepare'does not help at all for fixing the issue.This commit fixes more arch Makefile, and finally removes --include-dirfrom the top Makefile.There are more breakages under drivers/, but I do not volunteer to fixthem all. I just moved --include-dir to drivers/Makefile.With this commit, the second command will stop with a sensible message. $ make -s ARCH=x86 mrproper defconfig $ make ARCH=arm O=foo dtbs make[1]: Entering directory '/tmp/linux/foo' SYNC include/config/auto.conf.cmd *** *** The source tree is not clean, please run 'make ARCH=arm mrproper' *** in /tmp/linux *** make[2]: *** [../Makefile:646: outputmakefile] Error 1 /tmp/linux/Makefile:770: include/config/auto.conf.cmd: No such file or directory make[1]: *** [/tmp/linux/Makefile:793: include/config/auto.conf.cmd] Error 2 make[1]: Leaving directory '/tmp/linux/foo' make: *** [Makefile:226: __sub-make] Error 2Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/Kbuild

8212f898 - kbuild: use more subdir- for visiting subdirectories while cleaning

Wed, 13 Oct 2021 06:36:22 +0000

kbuild: use more subdir- for visiting subdirectories while cleaningDocumentation/kbuild/makefiles.rst suggests to use "archclean" forcleaning arch/$(SRCARCH)/boot/, but it is not a hard requirement.Since commit d92cc4d51643 ("kbuild: require all architectures to havearch/$(SRCARCH)/Kbuild"), we can use the "subdir- += boot" trick forall architectures. This can take advantage of the parallel option (-j)for "make clean".I also cleaned up the comments in arch/$(SRCARCH)/Makefile. The "archdep"target no longer exists.Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook Acked-by: Geert Uytterhoeven Acked-by: Michael Ellerman (powerpc) List of files: /linux-6.15/arch/mips/Kbuild

125be586 - MIPS: Fix "make clean" error due to recent changes

Wed, 13 May 2020 08:38:41 +0000

MIPS: Fix "make clean" error due to recent changesCommit 26bff9eb49201aeb ("MIPS: Only include the platformfile needed")moves platform-(CONFIG_XYZ) from arch/mips/xyz/Platform to arch/mips/Kbuild.platforms. This change causes an error when "make clean": ./scripts/Makefile.clean:15: arch/mips/vr41xx/Makefile: No such file or directory make[3]: *** No rule to make target `arch/mips/vr41xx/Makefile'. Stop. make[2]: *** [arch/mips/vr41xx] Error 2 make[1]: *** [_clean_arch/mips] Error 2 make: *** [sub-make] Error 2Clean-files are defined in arch/mips/Kbuild: obj- := $(platform-)Due to the movement of platform-(CONFIG_XYZ), "make clean" will enterarch/mips/vr41xx/ whether CONFIG_MACH_VR41XX is defined or not. Becausethere is no Makefile in arch/mips/vr41xx/, "make clean" fails. I don'tknow what is the best way to fix it, but it seems like we can avoid thiserror by changing the obj- definition: obj- := $(platform-y)Fixes: 26bff9eb49201aeb ("MIPS: Only include the platformfile needed")Signed-off-by: Huacai Chen Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Kbuild

96ac6d43 - treewide: Add SPDX license identifier - Kbuild

Thu, 30 May 2019 12:03:44 +0000

treewide: Add SPDX license identifier - KbuildAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0Reported-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman Reviewed-by: Kate Stewart Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/mips/Kbuild

5373633c - MIPS: Disable Werror when W= is set

Fri, 17 Mar 2017 01:06:12 +0000

MIPS: Disable Werror when W= is setUsing any value for W= will lead to a ton of warnings which are turnedinto fatal errors because MIPS adds -Werror to arch/mips/*.Signed-off-by: Florian Fainelli Cc: linux-mips@linux-mips.orgCc: james.hogan@imgtec.comPatchwork: https://patchwork.linux-mips.org/patch/15785/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

ebb5e78c - MIPS: Initial implementation of a VDSO

Wed, 21 Oct 2015 08:54:38 +0000

MIPS: Initial implementation of a VDSOAdd an initial implementation of a proper (i.e. an ELF shared library)VDSO. With this commit it does not export any symbols, it only replacesthe current signal return trampoline page. A later commit will add userimplementations of gettimeofday()/clock_gettime().To support both new toolchains and old ones which don't generate ABIflags section, we define its content manually and then use a tool(genvdso) to patch up the section to have the correct name and type.genvdso also extracts symbol offsets ({,rt_}sigreturn) needed by thekernel, and generates a C file containing a "struct mips_vdso_image"containing both the VDSO data and these offsets. This C file iscompiled into the kernel.On 64-bit kernels we require a different VDSO for each supported ABI,so we may build up to 3 different VDSOs. The VDSO to use is selected bythe mips_abi structure.A kernel/user shared data page is created and mapped below the VDSOimage. This is currently empty, but will be used by the user timefunction implementations which are added later.[markos.chandras@imgtec.com:- Add more comments- Move abi detection in genvdso.h since it's the get_symbol functionthat needs it.- Add an R6 specific way to calculate the base address of VDSO in orderto avoid the branch instruction which affects performance.- Do not patch .gnu.attributes since it's not needed for dynamic linking.- Simplify Makefile a little bit.- checkpatch fixes- Restrict VDSO support for binutils < 2.25 for pre-R6- Include atomic64.h for O32 variant on MIPS64]Signed-off-by: Alex Smith Signed-off-by: Markos Chandras Cc: Matthew Fortune Cc: linux-mips@linux-mips.orgPatchwork: https://patchwork.linux-mips.org/patch/11337/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

c6610de3 - MIPS: net: Add BPF JIT

Tue, 08 Apr 2014 11:47:14 +0000

MIPS: net: Add BPF JITThis adds initial support for BPF-JIT on MIPSTested on mips32 LE/BE and mips64 BE/n64 usingdhcp, ping and various tcpdump filters.Benchmarking:Assuming the remote MIPS target uses 192.168.154.181as its IP address, and the local host uses 192.168.154.136,the following results can be obtained using the followingtcpdump filter (catches no frames) and a simple'time ping -f -c 1000000' command.[root@(none) ~]# tcpdump -p -n -s 0 -i eth0 net 10.0.0.0/24 -d(000) ldh [12](001) jeq #0x800 jt 2 jf 8(002) ld [26](003) and #0xffffff00(004) jeq #0xa000000 jt 16 jf 5(005) ld [30](006) and #0xffffff00(007) jeq #0xa000000 jt 16 jf 17(008) jeq #0x806 jt 10 jf 9(009) jeq #0x8035 jt 10 jf 17(010) ld [28](011) and #0xffffff00(012) jeq #0xa000000 jt 16 jf 13(013) ld [38](014) and #0xffffff00(015) jeq #0xa000000 jt 16 jf 17(016) ret #65535- BPF-JIT Disabledreal 1m38.005suser 0m1.510ssys 0m6.710s- BPF-JIT Enabledreal 1m35.215suser 0m1.200ssys 0m4.140s[ralf@linux-mips.org: Resolved conflict.]Signed-off-by: Markos Chandras List of files: /linux-6.15/arch/mips/Kbuild

593d33fe - MIPS: math-emu: Move various objects into an ar library.

Thu, 24 Apr 2014 23:52:46 +0000

MIPS: math-emu: Move various objects into an ar library.ieee754d.o contains only debug code and dp_sqrt.o and sp_sqrt.o containcode which for MIPS I/II/III systems we don't want to link. Again thesavings can be considerable for some systems:$ mips-linux-size --totals ieee754d.o dp_sqrt.o sp_sqrt.o text data bss dec hex filename 1624 0 0 1624 658 ieee754d.o 2016 0 0 2016 7e0 dp_sqrt.o 736 0 0 736 2e0 sp_sqrt.o 4376 0 0 4376 1118 (TOTALS)Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

2235a54d - KVM/MIPS32: Infrastructure/build files.

Thu, 22 Nov 2012 02:33:59 +0000

KVM/MIPS32: Infrastructure/build files.- Add the KVM option to MIPS build files.- Add default config files for KVM host/guest kernels.- Change the link address for the Malta KVM Guest kernel to UM (0x40100000).- Add KVM Kconfig file with KVM/MIPS specific optionsSigned-off-by: Sanjay Lal Cc: kvm@vger.kernel.orgCc: linux-mips@linux-mips.orgSigned-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

ad4b2b62 - MIPS: Repair Kbuild make clean breakage.

Tue, 19 Oct 2010 00:51:26 +0000

MIPS: Repair Kbuild make clean breakage.When running make clean, Kbuild doesn't process the .config file, so nothinggenerates a platform-y variable. We can get it to descend into the platformdirectories by setting $(obj-).The dec Platform file was unconditionally setting platform-, obliteratingits previous contents and preventing some directories from being cleaned.This is change to an append operation '+=' to allow cavium-octeon to becleaned.Signed-off-by: David Daney Cc: Sam Ravnborg Patchwork: https://patchwork.linux-mips.org/patch/1718/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

5d25b01c - MIPS: Introduce support for Platform definitions

Sun, 30 May 2010 14:27:10 +0000

MIPS: Introduce support for Platform definitionsMove platform specific definitions to the platfrom directories.Each platform shall do the following:1) include an entry in arch/mips/Kbuild.platforms2) add relevant definitions to arch/mips//PlatformThis commits changes ar7 to the new scheme as an example.Introducing a platform speecific Platfrom file has following advantages:1) decentralization of platfrom definitions2) simplification af arch/mips/Makefile3) force all platfrom to build with -Werror (done in arch/mips/Kbuild)[Ralf: Remove forgotten -Werror from AR7 Makefile]Signed-off-by: Sam Ravnborg To: linux-mips To: Wu Zhangjin Patchwork: https://patchwork.linux-mips.org/patch/1302/Patchwork: http://patchwork.linux-mips.org/patch/1308/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

66f9ba10 - MIPS: Add -Werror to arch/mips/Kbuild

Sun, 30 May 2010 14:26:40 +0000

MIPS: Add -Werror to arch/mips/KbuildAdding subdirs-ccflags-y := -Werror to arch/mips/Kbuildlet us in one go cover all files with -Werror.In addition this allows us to remove theindividual -Werror definition in various Makefile.Adding the definition to Kbuild as a recursiveoption help us not to forget to do so.With this change we now compile arch/mips/kernel/cpufreq with -WerrorOne drawback:When specifying a subdirectory covered by the Kbuild file like this: make arch/mips/kernel/then kbuild fails to pick up the -Werror definition.Signed-off-by: Sam Ravnborg To: linux-mips To: Wu Zhangjin Patchwork: https://patchwork.linux-mips.org/patch/1301/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild

9aeb404b - MIPS: Introduce arch/mips/Kbuild

Sun, 30 May 2010 11:27:22 +0000

MIPS: Introduce arch/mips/KbuildSigned-off-by: Sam Ravnborg To: linux-mips To: Wu Zhangjin Patchwork: https://patchwork.linux-mips.org/patch/1300/Signed-off-by: Ralf Baechle List of files: /linux-6.15/arch/mips/Kbuild