systemd/0372-terminal-fix-tile-offset-calculation.patch

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2014-10-04 02:43:52 +00:00
From b4170aed36e667e52ce4a353bda1964e3872ab34 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Tue, 23 Sep 2014 13:38:09 +0200
Subject: [PATCH] terminal: fix tile-offset calculation
Binary operators with two pointers as arguments always operate on
object-size, not bytes. That is, "int *a, *b", (a - b) calculates the
number of integers between b and a, not the number of bytes.
Fix our cache-offset calculation to not use sizeof() with full-ptr
arithmetic.
---
src/libsystemd-terminal/grdev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/libsystemd-terminal/grdev.c b/src/libsystemd-terminal/grdev.c
index c5ea524c69..80a71beeb9 100644
--- a/src/libsystemd-terminal/grdev.c
+++ b/src/libsystemd-terminal/grdev.c
@@ -345,7 +345,7 @@ const grdev_display_target *grdev_display_next_target(grdev_display *display, co
assert(cache->pipe->tile->display == display);
assert(display->pipes >= cache);
- idx = (cache - display->pipes) / sizeof(*cache) + 1;
+ idx = cache - display->pipes + 1;
} else {
idx = 0;
}