From a287567d3cd108513d337f647a3902d3b7fade34 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Sat, 30 Aug 2014 18:15:55 -0700
Subject: [PATCH] runtime: fix Linux build

Make the definition of the EpollEvent data field consistent
across architectures, adapt the other use of it in
netpoll_epoll for the new definition, and use uint64 rather
than uintptr.

LGTM=dave
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/137890043
---
 src/pkg/runtime/defs_linux_386.h | 2 +-
 src/pkg/runtime/defs_linux_arm.h | 2 +-
 src/pkg/runtime/netpoll_epoll.c  | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/pkg/runtime/defs_linux_386.h b/src/pkg/runtime/defs_linux_386.h
index d19bb7a00f..24a05d862a 100644
--- a/src/pkg/runtime/defs_linux_386.h
+++ b/src/pkg/runtime/defs_linux_386.h
@@ -204,7 +204,7 @@ struct Itimerval {
 };
 struct EpollEvent {
 	uint32	events;
-	uint64	data;
+	byte	data[8]; // to match amd64
 };
 
 
diff --git a/src/pkg/runtime/defs_linux_arm.h b/src/pkg/runtime/defs_linux_arm.h
index 61bd30d59c..50b3c919ed 100644
--- a/src/pkg/runtime/defs_linux_arm.h
+++ b/src/pkg/runtime/defs_linux_arm.h
@@ -163,6 +163,6 @@ typedef struct EpollEvent EpollEvent;
 struct EpollEvent {
 	uint32	events;
 	uint32	_pad;
-	uint64	data;
+	byte	data[8]; // to match amd64
 };
 #pragma pack off
diff --git a/src/pkg/runtime/netpoll_epoll.c b/src/pkg/runtime/netpoll_epoll.c
index 2cf9b3760d..9d6c205155 100644
--- a/src/pkg/runtime/netpoll_epoll.c
+++ b/src/pkg/runtime/netpoll_epoll.c
@@ -37,7 +37,7 @@ runtime·netpollopen(uintptr fd, PollDesc *pd)
 	int32 res;
 
 	ev.events = EPOLLIN|EPOLLOUT|EPOLLRDHUP|EPOLLET;
-	*(uintptr*)ev.data = (uintptr)pd;
+	*(uint64*)ev.data = (uint64)(uintptr)pd;
 	res = runtime·epollctl(epfd, EPOLL_CTL_ADD, (int32)fd, &ev);
 	return -res;
 }
@@ -95,7 +95,7 @@ retry:
 		if(ev->events & (EPOLLOUT|EPOLLHUP|EPOLLERR))
 			mode += 'w';
 		if(mode)
-			runtime·netpollready(&gp, (void*)ev->data, mode);
+			runtime·netpollready(&gp, (void*)(uintptr)*(uint64*)ev->data, mode);
 	}
 	if(block && gp == nil)
 		goto retry;