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Kernel: Mark sys$mmap as not needing the big lock

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All accesses to shared mutable data are already serialized behind the
process address space spinlock.
This commit is contained in:
Idan Horowitz 2023-04-04 14:10:50 +03:00
parent dcdcab0099
commit 3697214166
2 changed files with 2 additions and 2 deletions
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2
Kernel/API/Syscall.h
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@ -125,7 +125,7 @@ enum class NeedsBigProcessLock {
S(map_time_page, NeedsBigProcessLock::No) \
S(mkdir, NeedsBigProcessLock::No) \
S(mknod, NeedsBigProcessLock::No) \
S(mmap, NeedsBigProcessLock::Yes) \
S(mmap, NeedsBigProcessLock::No) \
S(mount, NeedsBigProcessLock::Yes) \
S(mprotect, NeedsBigProcessLock::Yes) \
S(mremap, NeedsBigProcessLock::Yes) \

2
Kernel/Syscalls/mmap.cpp
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@ -125,7 +125,7 @@ ErrorOr<void> Process::validate_inode_mmap_prot(int prot, bool readable_descript
ErrorOr<FlatPtr> Process::sys$mmap(Userspace<Syscall::SC_mmap_params const*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::stdio));
auto params = TRY(copy_typed_from_user(user_params));