From c53bba03921d0377280c80557b984c12b8a72f64 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Thu, 5 Jan 2023 21:50:06 +0100
Subject: [PATCH] MemoryManager: Add an unmap_weak_and_free_vm() helper
 function

This function mirrors unmap_owned_and_free_vm(), but using weak unmapping (does not free the underlying physical memory)
---
 kernel/src/memory/MemoryManager.cpp | 9 +++++++++
 kernel/src/memory/MemoryManager.h   | 1 +
 2 files changed, 10 insertions(+)

diff --git a/kernel/src/memory/MemoryManager.cpp b/kernel/src/memory/MemoryManager.cpp
index 93447a5d..75014bae 100644
--- a/kernel/src/memory/MemoryManager.cpp
+++ b/kernel/src/memory/MemoryManager.cpp
@@ -309,6 +309,15 @@ namespace MemoryManager
         return {};
     }
 
+    Result<void> unmap_weak_and_free_vm(u64 virt, usize count)
+    {
+        CHECK_PAGE_ALIGNED(virt);
+
+        KernelVM::free_several_pages(virt, count);
+
+        return unmap_weak(virt, count);
+    }
+
     Result<void> remap_unaligned(u64 address, usize count, int flags)
     {
         if (!is_aligned<ARCH_PAGE_SIZE>(address)) count++;
diff --git a/kernel/src/memory/MemoryManager.h b/kernel/src/memory/MemoryManager.h
index 13a02a8a..d22ed45c 100644
--- a/kernel/src/memory/MemoryManager.h
+++ b/kernel/src/memory/MemoryManager.h
@@ -30,6 +30,7 @@ namespace MemoryManager
     Result<void> unmap_owned(u64 virt, usize count);
     Result<void> unmap_owned_and_free_vm(u64 virt, usize count);
     Result<void> unmap_weak(u64 virt, usize count);
+    Result<void> unmap_weak_and_free_vm(u64 virt, usize count);
 
     usize free();
     usize used();