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Kernel: Hoist VM range allocation up to sys$mmap() itself

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Instead of letting each File subclass do range allocation in their
mmap() override, do it up front in sys$mmap().

This makes us honor alignment requests for file-backed memory mappings
and simplifies the code somwhat.
This commit is contained in:
Andreas Kling
2021-01-25 14:52:36 +01:00
parent adcc1c1eff
commit ab14b0ac64
13 changed files with 26 additions and 36 deletions
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4
Kernel/FileSystem/FileDescription.cpp
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@@ -328,10 +328,10 @@ InodeMetadata FileDescription::metadata() const
return {};
}
KResultOr<Region*> FileDescription::mmap(Process& process, VirtualAddress vaddr, size_t offset, size_t size, int prot, bool shared)
KResultOr<Region*> FileDescription::mmap(Process& process, const Range& range, size_t offset, int prot, bool shared)
{
LOCKER(m_lock);
return m_file->mmap(process, *this, vaddr, offset, size, prot, shared);
return m_file->mmap(process, *this, range, offset, prot, shared);
}
KResult FileDescription::truncate(u64 length)