Messages in this thread | | | Subject | Re: [PATCH] powerpc/ftrace: Enable C Version of recordmcount | From | Christophe Leroy <> | Date | Thu, 9 May 2019 13:27:57 +0200 |
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Le 08/05/2019 à 02:45, Michael Ellerman a écrit : > Christophe Leroy <christophe.leroy@c-s.fr> writes: >> Selects HAVE_C_RECORDMCOUNT to use the C version of the recordmcount >> intead of the old Perl Version of recordmcount. >> >> This should improve build time. It also seems like the old Perl Version >> misses some calls to _mcount that the C version finds. > > That would make this a bug fix possibly for stable even. > > Any more details on what the difference is, is it just some random > subset of functions or some pattern?
I have not been able to identify any pattern. Will add a few details in the 'issue' on github.
Christophe
> > cheers > >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 2711aac24621..d87de4f9da61 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -180,6 +180,7 @@ config PPC >> select HAVE_ARCH_NVRAM_OPS >> select HAVE_ARCH_SECCOMP_FILTER >> select HAVE_ARCH_TRACEHOOK >> + select HAVE_C_RECORDMCOUNT >> select HAVE_CBPF_JIT if !PPC64 >> select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) >> select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) >> -- >> 2.13.3
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