From 9c7c8186379bcd50c7f4df8b55bb5b5c89b41310 Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@collabora.com>
Date: Thu, 26 Sep 2019 16:03:40 +0100
Subject: [PATCH] d/v4l2: Use more portable sysconf(_SC_PAGESIZE)

---
 src/xrt/drivers/v4l2/v4l2_driver.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/xrt/drivers/v4l2/v4l2_driver.c b/src/xrt/drivers/v4l2/v4l2_driver.c
index a123a2b47..6a046cde3 100644
--- a/src/xrt/drivers/v4l2/v4l2_driver.c
+++ b/src/xrt/drivers/v4l2/v4l2_driver.c
@@ -348,7 +348,8 @@ v4l2_setup_userptr_buffer(struct v4l2_fs *vid,
                           struct v4l2_buffer *v_buf)
 {
 	// align this to a memory page, v4l2 likes it that way
-	void *ptr = aligned_alloc(getpagesize(), v_buf->length);
+	long sz = sysconf(_SC_PAGESIZE);
+	void *ptr = aligned_alloc(sz, v_buf->length);
 	if (ptr == NULL) {
 		V_ERROR(vid, "error: Could not alloc page-aligned memory!");
 		return -1;