Revert "runtime: move epoll syscalls to runtime/internal/syscall"

This reverts CL 421994.

Reason for revert: breaks runtime.TestCheckPtr2

For #53824
For #51087

Change-Id: I044ea4d6efdffe0a4b7fb0d2bb3717d9f391fc59
Reviewed-on: https://go-review.googlesource.com/c/go/+/437295
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>

1 files changed, 1 insertions, 28 deletions

diff --git a/src/runtime/internal/syscall/syscall_linux.go b/src/runtime/internal/syscall/syscall_linux.go
index a103d318c4..7f268e8fba 100644
--- a/src/runtime/internal/syscall/syscall_linux.go
+++ b/src/runtime/internal/syscall/syscall_linux.go
@@ -6,7 +6,7 @@
 package syscall
 
 import (
-	"unsafe"
+	_ "unsafe" // for go:linkname
 )
 
 // TODO(https://go.dev/issue/51087): This package is incomplete and currently
@@ -37,30 +37,3 @@ func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
 func syscall_RawSyscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr) {
 	return Syscall6(num, a1, a2, a3, a4, a5, a6)
 }
-
-func EpollCreate1(flags int32) (fd int32, errno uintptr) {
-	r1, _, e := Syscall6(SYS_EPOLL_CREATE1, uintptr(flags), 0, 0, 0, 0, 0)
-	return int32(r1), e
-}
-
-var _zero uintptr
-
-func EpollWait(epfd int32, events []EpollEvent, maxev, waitms int32) (n int32, errno uintptr) {
-	var ev unsafe.Pointer
-	if len(events) > 0 {
-		ev = unsafe.Pointer(&events[0])
-	} else {
-		ev = unsafe.Pointer(&_zero)
-	}
-	r1, _, e := Syscall6(SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(ev), uintptr(maxev), uintptr(waitms), 0, 0)
-	return int32(r1), e
-}
-
-func EpollCtl(epfd, op, fd int32, event *EpollEvent) (errno uintptr) {
-	_, _, e := Syscall6(SYS_EPOLL_CTL, uintptr(epfd), uintptr(op), uintptr(fd), uintptr(unsafe.Pointer(event)), 0, 0)
-	return e
-}
-
-func CloseOnExec(fd int32) {
-	Syscall6(SYS_FCNTL, uintptr(fd), F_SETFD, FD_CLOEXEC, 0, 0, 0)
-}