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| author | Idan Horowitz <idan.horowitz@gmail.com> | 2023-04-04 14:16:24 +0300 |
|---|---|---|
| committer | Idan Horowitz <idan.horowitz@gmail.com> | 2023-04-06 20:30:03 +0300 |
| commit | 3f89a1b1314a080b5f3a3c9555b22a81efc80513 (patch) | |
| tree | 7312e62b10c2f6ad0be19f32ce694f23707185a3 /Kernel | |
| parent | 1dae6a2e4a9b5579a1720ca95458115845bb75cf (diff) | |
| download | serenity-3f89a1b1314a080b5f3a3c9555b22a81efc80513.zip | |
Kernel: Mark sys$msync as not needing the big lock
All accesses to shared mutable data are already serialized behind the
process address space spinlock.
Diffstat (limited to 'Kernel')
| -rw-r--r-- | Kernel/API/Syscall.h | 2 | ||||
| -rw-r--r-- | Kernel/Syscalls/mmap.cpp | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h index ccbaf63212..1ab7d2d41c 100644 --- a/Kernel/API/Syscall.h +++ b/Kernel/API/Syscall.h @@ -129,7 +129,7 @@ enum class NeedsBigProcessLock { S(mount, NeedsBigProcessLock::Yes) \ S(mprotect, NeedsBigProcessLock::No) \ S(mremap, NeedsBigProcessLock::No) \ - S(msync, NeedsBigProcessLock::Yes) \ + S(msync, NeedsBigProcessLock::No) \ S(munmap, NeedsBigProcessLock::No) \ S(open, NeedsBigProcessLock::No) \ S(perf_event, NeedsBigProcessLock::Yes) \ diff --git a/Kernel/Syscalls/mmap.cpp b/Kernel/Syscalls/mmap.cpp index b38521176a..16cba676ee 100644 --- a/Kernel/Syscalls/mmap.cpp +++ b/Kernel/Syscalls/mmap.cpp @@ -606,6 +606,7 @@ ErrorOr<FlatPtr> Process::sys$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; |