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Kernel: Mark sys$msync 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 14:16:24 +03:00
parent 1dae6a2e4a
commit 3f89a1b131
2 changed files with 2 additions and 1 deletions
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2
Kernel/API/Syscall.h
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@ -129,7 +129,7 @@ enum class NeedsBigProcessLock {
S(mount, NeedsBigProcessLock::Yes) \
S(mprotect, NeedsBigProcessLock::No) \
S(mremap, NeedsBigProcessLock::No) \
S(msync, NeedsBigProcessLock::Yes) \
S(msync, NeedsBigProcessLock::No) \
S(munmap, NeedsBigProcessLock::No) \
S(open, NeedsBigProcessLock::No) \
S(perf_event, NeedsBigProcessLock::Yes) \

1
Kernel/Syscalls/mmap.cpp
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@ -606,6 +606,7 @@ ErrorOr<FlatPtr> Process::sys$annotate_mapping(Userspace<void*> address, int fla
ErrorOr<FlatPtr> Process::sys$msync(Userspace<void*> address, size_t size, int flags)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
if ((flags & (MS_SYNC | MS_ASYNC | MS_INVALIDATE)) != flags)
return EINVAL;