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Kernel: Remove unused MAP_SHARED_ZERO_PAGE_LAZILY code path

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This commit is contained in:
Andreas Kling 2021-07-23 00:49:10 +02:00
parent 59007bba84
commit 64babcaa83
1 changed files with 0 additions and 9 deletions
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9
Kernel/VM/Region.cpp
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@ -431,17 +431,8 @@ PageFaultResponse Region::handle_fault(PageFault const& fault, ScopedSpinLock<Re
remap_vmobject_page(page_index_in_vmobject); remap_vmobject_page(page_index_in_vmobject);
return PageFaultResponse::Continue; return PageFaultResponse::Continue;
} }
#ifdef MAP_SHARED_ZERO_PAGE_LAZILY
if (fault.is_read()) {
page_slot = MM.shared_zero_page();
remap_vmobject_page(translate_to_vmobject_page(page_index_in_region));
return PageFaultResponse::Continue;
}
return handle_zero_fault(page_index_in_region, mm_lock);
#else
dbgln("BUG! Unexpected NP fault at {}", fault.vaddr()); dbgln("BUG! Unexpected NP fault at {}", fault.vaddr());
return PageFaultResponse::ShouldCrash; return PageFaultResponse::ShouldCrash;
#endif
} }
VERIFY(fault.type() == PageFault::Type::ProtectionViolation); VERIFY(fault.type() == PageFault::Type::ProtectionViolation);
if (fault.access() == PageFault::Access::Write && is_writable() && should_cow(page_index_in_region)) { if (fault.access() == PageFault::Access::Write && is_writable() && should_cow(page_index_in_region)) {