On Sat, 2017-04-01 at 23:40 +0100, Ben Hutchings wrote: > On Sat, 2017-04-01 at 10:43 -0700, Guenter Roeck wrote: > [snip list of MIPS failures] > > I tried to build mips:allnoconfig with the following binutils versions. > > They all fail with the same errors. > > 2.22 (from Poky version 1.3) > > 2.22 (kernel toolchain, gcc 4.6.3) > > 2.24 (kernel toolchain, gcc 4.9.0) > > 2.26.1 (buildroot toolchain, gcc 5.4.0) > > > > Bisect points to commit c4cf8e3a3e8f as the culprit. > > > > Details are available at http://kerneltests.org/builders. > > > > Unfortunately, just reverting this one patch doesn't work. > > Reverting > > > > f1ece3b9dd5e MIPS: Fix build with binutils 2.24.51+ > > f8547d2f97c8 MIPS: init upper 64b of vector registers when MSA is first used > > c4cf8e3a3e8f MIPS: save/restore MSACSR register on context switch > > > > fixes the problem, at least for an allnoconfig build with binutils 2.24. > > I've now tested with binutils 2.25 and 2.28 and added these: > > 558155a0a731 MIPS: allow msa.h to be included in assembly files > 631afc65e8f4 MIPS: Push .set mips64r* into the functions needing it > f23ce3883a30 MIPS: assume at as source/dest of MSA copy/insert instructions > a3a49810c55e MIPS: remove MSA macro recursion > e1bebbab1eae MIPS: wrap cfcmsa & ctcmsa accesses for toolchains with MSA support > > which resolve the build regressions for these versions at least. [...] Also added: 5e32033e14ca MIPS: mipsregs.h: Add write_32bit_cp1_register() d76e9b9fc5de MIPS: traps: Fix inline asm ctc1 missing .set hardfloat to address 3 remaining build failures on your build farm. Ben. -- Ben Hutchings It is impossible to make anything foolproof because fools are so ingenious.
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