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VM: Get rid of KernelPagingScope.

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Every page directory inherits the kernel page directory, so there's no need
to explicitly enter the kernel's paging scope anymore.
This commit is contained in:
Andreas Kling 2019-06-01 17:51:48 +02:00
parent 00f291b090
commit 49768524d4
Notes: sideshowbarker 2024-07-19 13:48:17 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/49768524d4c
2 changed files with 0 additions and 23 deletions
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17
Kernel/VM/MemoryManager.cpp
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@ -454,12 +454,6 @@ void MemoryManager::enter_process_paging_scope(Process& process)
asm volatile("movl %%eax, %%cr3"::"a"(process.page_directory().cr3()):"memory");
}
void MemoryManager::enter_kernel_paging_scope()
{
InterruptDisabler disabler;
asm volatile("movl %%eax, %%cr3"::"a"(kernel_page_directory().cr3()):"memory");
}
void MemoryManager::flush_entire_tlb()
{
asm volatile(
@ -666,14 +660,3 @@ ProcessPagingScope::~ProcessPagingScope()
{
MM.enter_process_paging_scope(current->process());
}
KernelPagingScope::KernelPagingScope()
{
ASSERT(current);
MM.enter_kernel_paging_scope();
}
KernelPagingScope::~KernelPagingScope()
{
MM.enter_process_paging_scope(current->process());
}

6
Kernel/VM/MemoryManager.h
View file

@ -51,7 +51,6 @@ public:
void populate_page_directory(PageDirectory&);
void enter_process_paging_scope(Process&);
void enter_kernel_paging_scope();
bool validate_user_read(const Process&, LinearAddress) const;
bool validate_user_write(const Process&, LinearAddress) const;
@ -238,8 +237,3 @@ struct ProcessPagingScope {
ProcessPagingScope(Process&);
~ProcessPagingScope();
};
struct KernelPagingScope {
KernelPagingScope();
~KernelPagingScope();
};