Also make x86 sync_file_range a cancellation point.

3 files changed, 50 insertions, 3 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/Makefile b/sysdeps/unix/sysv/linux/i386/Makefile
index f52ee89f0e..fc5a524ebf 100644
--- a/sysdeps/unix/sysv/linux/i386/Makefile
+++ b/sysdeps/unix/sysv/linux/i386/Makefile
@@ -6,7 +6,10 @@ endif
 ifeq ($(subdir),elf)
 sysdep-others += lddlibc4
 install-bin += lddlibc4
+endif
 
+ifeq ($(subdir),io)
+sysdep_routines += call_sync_file_range
 endif
 
 ifeq ($(subdir),resource)
diff --git a/sysdeps/unix/sysv/linux/i386/sync_file_range.S b/sysdeps/unix/sysv/linux/i386/call_sync_file_range.S
index 8544703d56..fb0ab492cb 100644
--- a/sysdeps/unix/sysv/linux/i386/sync_file_range.S
+++ b/sysdeps/unix/sysv/linux/i386/call_sync_file_range.S
@@ -1,5 +1,5 @@
 /* Selective file content synch'ing.
-   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2007, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -23,7 +23,7 @@
 
 
 	.text
-ENTRY (sync_file_range)
+ENTRY (__call_sync_file_range)
 #ifdef __NR_sync_file_range
 	pushl	%ebx
 	cfi_adjust_cfa_offset (4)
@@ -69,4 +69,4 @@ ENTRY (sync_file_range)
 #endif
 L(pseudo_end):
 	ret
-PSEUDO_END (sync_file_range)
+PSEUDO_END (__call_sync_file_range)
diff --git a/sysdeps/unix/sysv/linux/i386/sync_file_range.c b/sysdeps/unix/sysv/linux/i386/sync_file_range.c
new file mode 100644
index 0000000000..c10e99604a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/sync_file_range.c
@@ -0,0 +1,44 @@
+/* Selective file content synch'ing.
+   Copyright (C) 2006, 2007, 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sysdep-cancel.h>
+
+
+extern int __call_sync_file_range (int fd, off64_t offset, off64_t nbytes,
+				   unsigned int flags)
+     attribute_hidden;
+
+
+int
+sync_file_range (int fd, __off64_t from, __off64_t to, unsigned int flags)
+{
+  if (SINGLE_THREAD_P)
+    return __call_sync_file_range (fd, from, to, flags);
+
+  int result;
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  result = __call_sync_file_range (fd, from, to, flags);
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}