From 14f0c9317546e69e289efc6e24217ce20d550a5a Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Wed, 20 Sep 2023 22:41:48 +0200
Subject: [PATCH] kernel: Allow mapping the framebuffer even if its size is not
 page-aligned

---
 kernel/src/fs/devices/FramebufferDevice.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/src/fs/devices/FramebufferDevice.cpp b/kernel/src/fs/devices/FramebufferDevice.cpp
index 39f19f44..7617b914 100644
--- a/kernel/src/fs/devices/FramebufferDevice.cpp
+++ b/kernel/src/fs/devices/FramebufferDevice.cpp
@@ -4,6 +4,7 @@
 #include "video/Framebuffer.h"
 #include <bits/ioctl-defs.h>
 #include <luna/CString.h>
+#include <luna/Alignment.h>
 
 Result<void> FramebufferDevice::create()
 {
@@ -27,7 +28,7 @@ Result<usize> FramebufferDevice::write(const u8* buf, usize offset, usize length
 
 Result<u64> FramebufferDevice::query_shared_memory(off_t offset, usize count)
 {
-    if (offset + (count * ARCH_PAGE_SIZE) > Framebuffer::size()) return err(EINVAL);
+    if (offset + (count * ARCH_PAGE_SIZE) > align_up<ARCH_PAGE_SIZE>((u64)Framebuffer::size())) return err(EINVAL);
 
     if (!m_shmid.has_value())
     {