From 265d97d02e8ef373653c76a339869985eb3ba27a Mon Sep 17 00:00:00 2001
From: Gustavo Zacarias <gustavo@zacarias.com.ar>
Date: Tue, 10 Mar 2015 15:10:35 -0300
Subject: [PATCH] configure: add check for fallocate

We need to check for fallocate() rather than just linux/falloc.h +
FALLOC_FL_PUNCH_HOLE since in uClibc we've got both but still not
fallocate() itself since it's only implemented in newer unreleased
versions.

Status: sent upstream.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
---
 configure.ac             | 1 +
 mkfs/f2fs_format_utils.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index ae451b8..900b84a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,6 +68,7 @@ AC_TYPE_SIZE_T
 # Checks for library functions.
 AC_FUNC_GETMNTENT
 AC_CHECK_FUNCS_ONCE([
+	fallocate
 	getmntent
 	memset
 ])
diff --git a/mkfs/f2fs_format_utils.c b/mkfs/f2fs_format_utils.c
index a0f85f5..ddeafeb 100644
--- a/mkfs/f2fs_format_utils.c
+++ b/mkfs/f2fs_format_utils.c
@@ -46,7 +46,7 @@ int f2fs_trim_device()
 #if defined(WITH_BLKDISCARD) && defined(BLKDISCARD)
 	MSG(0, "Info: Discarding device\n");
 	if (S_ISREG(stat_buf.st_mode)) {
-#ifdef FALLOC_FL_PUNCH_HOLE
+#if defined(HAVE_FALLOCATE) && defined(FALLOC_FL_PUNCH_HOLE)
 		if (fallocate(config.fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
 				range[0], range[1]) < 0) {
 			MSG(0, "Info: fallocate(PUNCH_HOLE|KEEP_SIZE) is failed\n");
-- 
2.0.5