On Mon, Nov 16, 2020 at 2:07 PM Khem Raj <raj.k...@gmail.com> wrote: > glibc does not define SYS_futex for 32bit architectures using 64bit > time_t e.g. riscv32, therefore perf fails to compile as it does not find > SYS_futex in C library headers, define it to SYS_futex_time64 when it > exists >
I've queued this on linux-yocto. But which versions were you interested in ? I did -dev and 5.8. Bruce > > Upstream-Status: Pending > Signed-off-by: Khem Raj <raj.k...@gmail.com> > --- > tools/perf/bench/futex.h | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h > index 31b53cc7d5bc..33f3f3230ae1 100644 > --- a/tools/perf/bench/futex.h > +++ b/tools/perf/bench/futex.h > @@ -13,6 +13,19 @@ > #include <sys/types.h> > #include <linux/futex.h> > > +/** > + * SYS_futex is expected from system C library, > + * in glibc (/usr/include/bits/syscall.h defines it in terms of of > NR_futex) > + * some newer 32bit architectures e.g. RISCV32 is using 64bit time_t from > + * get go unlike other 32bit architectures in glibc, therefore it wont > have > + * NR_futex defined but just NR_futex_time64 this aliases it to NR_futex > + * so that SYS_futex is then defined for rv32 > +*/ > + > +#if !defined(SYS_futex) && defined(SYS_futex_time64) > +#define SYS_futex SYS_futex_time64 > +#endif > + > /** > * futex() - SYS_futex syscall wrapper > * @uaddr: address of first futex > -- > 2.29.2 > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II
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