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Kernel: Use RefPtr instead of LockRefPtr for PhysicalPage

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I believe this to be safe, as the main thing that LockRefPtr provides
over RefPtr is safe copying from a shared LockRefPtr instance. I've
inspected the uses of RefPtr<PhysicalPage> and it seems they're all
guarded by external locking. Some of it is less obvious, but this is
an area where we're making continuous headway.
This commit is contained in:
Andreas Kling 2022-08-24 15:56:26 +02:00
parent 5a804b9a1d
commit 2c72d495a3
33 changed files with 141 additions and 138 deletions
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12
Kernel/Memory/Region.cpp
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@ -202,7 +202,7 @@ ErrorOr<void> Region::set_should_cow(size_t page_index, bool cow)
return {};
}
bool Region::map_individual_page_impl(size_t page_index, LockRefPtr<PhysicalPage> page)
bool Region::map_individual_page_impl(size_t page_index, RefPtr<PhysicalPage> page)
{
VERIFY(m_page_directory->get_lock().is_locked_by_current_processor());
@ -240,7 +240,7 @@ bool Region::map_individual_page_impl(size_t page_index, LockRefPtr<PhysicalPage
bool Region::map_individual_page_impl(size_t page_index)
{
LockRefPtr<PhysicalPage> page;
RefPtr<PhysicalPage> page;
{
SpinlockLocker vmobject_locker(vmobject().m_lock);
page = physical_page(page_index);
@ -249,7 +249,7 @@ bool Region::map_individual_page_impl(size_t page_index)
return map_individual_page_impl(page_index, page);
}
bool Region::remap_vmobject_page(size_t page_index, NonnullLockRefPtr<PhysicalPage> physical_page)
bool Region::remap_vmobject_page(size_t page_index, NonnullRefPtr<PhysicalPage> physical_page)
{
SpinlockLocker page_lock(m_page_directory->get_lock());
@ -408,7 +408,7 @@ PageFaultResponse Region::handle_zero_fault(size_t page_index_in_region, Physica
if (current_thread != nullptr)
current_thread->did_zero_fault();
LockRefPtr<PhysicalPage> new_physical_page;
RefPtr<PhysicalPage> new_physical_page;
if (page_in_slot_at_time_of_fault.is_lazy_committed_page()) {
VERIFY(m_vmobject->is_anonymous());
@ -543,14 +543,14 @@ PageFaultResponse Region::handle_inode_fault(size_t page_index_in_region)
return PageFaultResponse::Continue;
}
LockRefPtr<PhysicalPage> Region::physical_page(size_t index) const
RefPtr<PhysicalPage> Region::physical_page(size_t index) const
{
SpinlockLocker vmobject_locker(vmobject().m_lock);
VERIFY(index < page_count());
return vmobject().physical_pages()[first_page_index() + index];
}
LockRefPtr<PhysicalPage>& Region::physical_page_slot(size_t index)
RefPtr<PhysicalPage>& Region::physical_page_slot(size_t index)
{
VERIFY(vmobject().m_lock.is_locked_by_current_processor());
VERIFY(index < page_count());