1234567891011121314151617181920212223242526272829303132333435363738394041424344 |
- From 4965d191806c9a28bffbb157228bf42270b0008e Mon Sep 17 00:00:00 2001
- From: Khem Raj <raj.khem@gmail.com>
- Date: Mon, 16 Nov 2020 11:03:31 -0800
- Subject: [PATCH] perf: Alias SYS_futex with SYS_futex_time64 on 32-bit arches
- with 64bit time_t
- 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
- Upstream-Status: Pending
- Signed-off-by: Khem Raj <raj.khem@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
|