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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2016-11-18 13:56:05 -0200
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-05-03 10:36:01 -0300
commitb5eede9730eccec155c2374d20d401cd032519fd (patch)
treebf36e60fe7fc710a9116fcfe8c1f2d7147e0b403 /sysdeps/unix
parent14ea415d042dcb934a021114c872f3ae7dc7a51c (diff)
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Consolidate Linux poll implementation
This patch consolidates the poll Linux syscall implementation on
sysdeps/unix/sysv/linux/poll.c.  It basically removes poll from
auto-generation list and add a default implementation that either
call __NR_poll directly (if the kernel headers defines it) or
ppoll adjusting the timeout argument (as the generic implementation).

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/generic/poll.c: Remove file.
	* sysdeps/unix/sysv/linux/poll.c: New file.
	* sysdeps/unix/sysv/linux/syscalls.list: Remove poll from
	auto-generation list.
Diffstat (limited to 'sysdeps/unix')
-rw-r--r--sysdeps/unix/sysv/linux/poll.c (renamed from sysdeps/unix/sysv/linux/generic/poll.c)8
-rw-r--r--sysdeps/unix/sysv/linux/syscalls.list1
2 files changed, 6 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/poll.c b/sysdeps/unix/sysv/linux/poll.c
index c06d383e2c..5a781ddf48 100644
--- a/sysdeps/unix/sysv/linux/generic/poll.c
+++ b/sysdeps/unix/sysv/linux/poll.c
@@ -1,6 +1,6 @@
-/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
+/* Linux poll implementation.
+   Copyright (C) 2017 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -25,6 +25,9 @@
 int
 __poll (struct pollfd *fds, nfds_t nfds, int timeout)
 {
+#ifdef __NR_poll
+  return SYSCALL_CANCEL (poll, fds, nfds, timeout);
+#else
   struct timespec timeout_ts;
   struct timespec *timeout_ts_p = NULL;
 
@@ -36,6 +39,7 @@ __poll (struct pollfd *fds, nfds_t nfds, int timeout)
     }
 
   return SYSCALL_CANCEL (ppoll, fds, nfds, timeout_ts_p, NULL, 0);
+#endif
 }
 libc_hidden_def (__poll)
 weak_alias (__poll, poll)
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 5d3c417d51..fcefefcad2 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -50,7 +50,6 @@ pause		-	pause		Ci:	__libc_pause	pause
 pipe		-	pipe		i:f	__pipe		pipe
 pipe2		-	pipe2		i:fi	__pipe2		pipe2
 pivot_root	EXTRA	pivot_root	i:ss	pivot_root
-poll		-	poll		Ci:pii	__libc_poll	__poll poll
 prctl		EXTRA	prctl		i:iiiii	__prctl		prctl
 putpmsg		-	putpmsg		i:ippii	putpmsg
 query_module	EXTRA	query_module	i:sipip	__compat_query_module	query_module@GLIBC_2.0:GLIBC_2.23