AK: Make Bitmap use size_t for its size

Also rework its API's to return Optional<size_t> instead of int with -1
as the error value.

2 files changed, 2 insertions, 2 deletions

diff --git a/Kernel/VM/InodeVMObject.cpp b/Kernel/VM/InodeVMObject.cpp
index 8d14b4d3c0..7311fe8886 100644
--- a/Kernel/VM/InodeVMObject.cpp
+++ b/Kernel/VM/InodeVMObject.cpp
@@ -78,7 +78,7 @@ size_t InodeVMObject::amount_clean() const
 size_t InodeVMObject::amount_dirty() const
 {
     size_t count = 0;
-    for (int i = 0; i < m_dirty_pages.size(); ++i) {
+    for (size_t i = 0; i < m_dirty_pages.size(); ++i) {
         if (m_dirty_pages.get(i))
             ++count;
     }
diff --git a/Kernel/VM/Region.cpp b/Kernel/VM/Region.cpp
index 2c02c045d3..5f399acc72 100644
--- a/Kernel/VM/Region.cpp
+++ b/Kernel/VM/Region.cpp
@@ -164,7 +164,7 @@ u32 Region::cow_pages() const
     if (!m_cow_map)
         return 0;
     u32 count = 0;
-    for (int i = 0; i < m_cow_map->size(); ++i)
+    for (size_t i = 0; i < m_cow_map->size(); ++i)
         count += m_cow_map->get(i);
     return count;
 }