RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-20 13:25:08 +00:00
Code Issues Activity Actions

Kernel: Don't require AnonymousFiles to be mmap'd completely

Browse source 
AnonymousFile always allocates in multiples of a page size when created
with anon_create. This is especially an issue if we use AnonymousFile
shared memory to store a shared data structure that isn't exactly a
multiple of a page in size. Therefore, we can just allow mmaps of
AnonymousFile to map only an initial part of the shared memory.

This makes SharedSingleProducerCircularQueue work when it's introduced
later.
This commit is contained in:
kleines Filmröllchen 2022-04-05 14:24:53 +02:00 • committed by Linus Groh
parent 65b338ad04
commit b0a2572577
1 changed files with 0 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

3
Kernel/FileSystem/AnonymousFile.cpp
View file

@ -22,9 +22,6 @@ ErrorOr<Memory::Region*> AnonymousFile::mmap(Process& process, OpenFileDescripti
if (offset != 0)
return EINVAL;
if (range.size() != m_vmobject->size())
return EINVAL;
return process.address_space().allocate_region_with_vmobject(range, m_vmobject, offset, {}, prot, shared);
}