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Kernel: Remove unnecessary weak pointer from Region to owning Process

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This was previously used for a single debug logging statement during
memory purging. There are no remaining users of this weak pointer,
so let's get rid of it.
This commit is contained in:
Andreas Kling 2021-07-25 17:04:54 +02:00
parent 25a5fd870c
commit 4648bcd3d4
4 changed files with 10 additions and 21 deletions
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15
Kernel/VM/Region.cpp
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@ -52,7 +52,7 @@ Region::~Region()
MM.unregister_region(*this);
}
OwnPtr<Region> Region::clone(Process& new_owner)
OwnPtr<Region> Region::clone()
{
VERIFY(Process::current());
@ -65,7 +65,7 @@ OwnPtr<Region> Region::clone(Process& new_owner)
// Create a new region backed by the same VMObject.
auto region = Region::try_create_user_accessible(
&new_owner, m_range, m_vmobject, m_offset_in_vmobject, m_name ? m_name->try_clone() : OwnPtr<KString> {}, access(), m_cacheable ? Cacheable::Yes : Cacheable::No, m_shared);
m_range, m_vmobject, m_offset_in_vmobject, m_name ? m_name->try_clone() : OwnPtr<KString> {}, access(), m_cacheable ? Cacheable::Yes : Cacheable::No, m_shared);
if (!region) {
dbgln("Region::clone: Unable to allocate new Region");
return nullptr;
@ -86,7 +86,7 @@ OwnPtr<Region> Region::clone(Process& new_owner)
// Set up a COW region. The parent (this) region becomes COW as well!
remap();
auto clone_region = Region::try_create_user_accessible(
&new_owner, m_range, vmobject_clone.release_nonnull(), m_offset_in_vmobject, m_name ? m_name->try_clone() : OwnPtr<KString> {}, access(), m_cacheable ? Cacheable::Yes : Cacheable::No, m_shared);
m_range, vmobject_clone.release_nonnull(), m_offset_in_vmobject, m_name ? m_name->try_clone() : OwnPtr<KString> {}, access(), m_cacheable ? Cacheable::Yes : Cacheable::No, m_shared);
if (!clone_region) {
dbgln("Region::clone: Unable to allocate new Region for COW");
return nullptr;
@ -147,13 +147,11 @@ size_t Region::amount_shared() const
return bytes;
}
OwnPtr<Region> Region::try_create_user_accessible(Process* owner, Range const& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, OwnPtr<KString> name, Region::Access access, Cacheable cacheable, bool shared)
OwnPtr<Region> Region::try_create_user_accessible(Range const& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, OwnPtr<KString> name, Region::Access access, Cacheable cacheable, bool shared)
{
auto region = adopt_own_if_nonnull(new (nothrow) Region(range, move(vmobject), offset_in_vmobject, move(name), access, cacheable, shared));
if (!region)
return nullptr;
if (owner)
region->m_owner = owner->make_weak_ptr();
return region;
}
@ -463,9 +461,4 @@ PageFaultResponse Region::handle_inode_fault(size_t page_index_in_region)
return PageFaultResponse::Continue;
}
RefPtr<Process> Region::get_owner()
{
return m_owner.strong_ref();
}
}