sd-event: reenable epoll_pwait2()

This reenables epoll_pwait2() use, i.e. undoes the effect of
39f756d3ae4765b8bf017567a12b8a4b358eaaf5.

Instead of just reverting that, this PR will change things so that we
strictly rely on glibc's new epoll_pwait2() wrapper (which was added
earlier this year), and drop our own manual fallback syscall wrapper.
That should nicely side-step any issues with correct syscall wrapping
definitions (which on some arch seem not to be easy, given the sigset_t
size final argument), by making this a glibc problem, not ours.

Given that the only benefit this delivers are time-outs more granular
than msec, it shouldn't really matter that we'll miss out on support
for this on systems with older glibcs.

1 files changed, 0 insertions, 68 deletions

diff --git a/src/basic/missing_syscall_def.h b/src/basic/missing_syscall_def.h
index 67cae7098d..402fdd00dc 100644
--- a/src/basic/missing_syscall_def.h
+++ b/src/basic/missing_syscall_def.h
@@ -246,74 +246,6 @@ assert_cc(__NR_copy_file_range == systemd_NR_copy_file_range);
 #  endif
 #endif
 
-#ifndef __IGNORE_epoll_pwait2
-#  if defined(__aarch64__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__alpha__)
-#    define systemd_NR_epoll_pwait2 551
-#  elif defined(__arc__) || defined(__tilegx__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__arm__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__i386__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__ia64__)
-#    define systemd_NR_epoll_pwait2 1465
-#  elif defined(__loongarch64)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__m68k__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(_MIPS_SIM)
-#    if _MIPS_SIM == _MIPS_SIM_ABI32
-#      define systemd_NR_epoll_pwait2 4441
-#    elif _MIPS_SIM == _MIPS_SIM_NABI32
-#      define systemd_NR_epoll_pwait2 6441
-#    elif _MIPS_SIM == _MIPS_SIM_ABI64
-#      define systemd_NR_epoll_pwait2 5441
-#    else
-#      error "Unknown MIPS ABI"
-#    endif
-#  elif defined(__hppa__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__powerpc__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__riscv)
-#    if __riscv_xlen == 32
-#      define systemd_NR_epoll_pwait2 441
-#    elif __riscv_xlen == 64
-#      define systemd_NR_epoll_pwait2 441
-#    else
-#      error "Unknown RISC-V ABI"
-#    endif
-#  elif defined(__s390__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__sparc__)
-#    define systemd_NR_epoll_pwait2 441
-#  elif defined(__x86_64__)
-#    if defined(__ILP32__)
-#      define systemd_NR_epoll_pwait2 (441 | /* __X32_SYSCALL_BIT */ 0x40000000)
-#    else
-#      define systemd_NR_epoll_pwait2 441
-#    endif
-#  elif !defined(missing_arch_template)
-#    warning "epoll_pwait2() syscall number is unknown for your architecture"
-#  endif
-
-/* may be an (invalid) negative number due to libseccomp, see PR 13319 */
-#  if defined __NR_epoll_pwait2 && __NR_epoll_pwait2 >= 0
-#    if defined systemd_NR_epoll_pwait2
-assert_cc(__NR_epoll_pwait2 == systemd_NR_epoll_pwait2);
-#    endif
-#  else
-#    if defined __NR_epoll_pwait2
-#      undef __NR_epoll_pwait2
-#    endif
-#    if defined systemd_NR_epoll_pwait2 && systemd_NR_epoll_pwait2 >= 0
-#      define __NR_epoll_pwait2 systemd_NR_epoll_pwait2
-#    endif
-#  endif
-#endif
-
 #ifndef __IGNORE_getrandom
 #  if defined(__aarch64__)
 #    define systemd_NR_getrandom 278