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| author | Idan Horowitz <idan.horowitz@gmail.com> | 2023-04-04 14:15:17 +0300 |
|---|---|---|
| committer | Idan Horowitz <idan.horowitz@gmail.com> | 2023-04-06 20:30:03 +0300 |
| commit | 1dae6a2e4a9b5579a1720ca95458115845bb75cf (patch) | |
| tree | 6d7680baaa15811455e6a60531032e4103119704 | |
| parent | db10f201c8dfe9bd1f398a24d417480ec3dd9df6 (diff) | |
| download | serenity-1dae6a2e4a9b5579a1720ca95458115845bb75cf.zip | |
Kernel: Mark sys$mremap as not needing the big lock
All accesses to shared mutable data are already serialized behind the
process address space spinlock.
| -rw-r--r-- | Kernel/API/Syscall.h | 2 | ||||
| -rw-r--r-- | Kernel/Syscalls/mmap.cpp | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h index 246bcf08ad..ccbaf63212 100644 --- a/Kernel/API/Syscall.h +++ b/Kernel/API/Syscall.h @@ -128,7 +128,7 @@ enum class NeedsBigProcessLock { S(mmap, NeedsBigProcessLock::No) \ S(mount, NeedsBigProcessLock::Yes) \ S(mprotect, NeedsBigProcessLock::No) \ - S(mremap, NeedsBigProcessLock::Yes) \ + S(mremap, NeedsBigProcessLock::No) \ S(msync, NeedsBigProcessLock::Yes) \ S(munmap, NeedsBigProcessLock::No) \ S(open, NeedsBigProcessLock::No) \ diff --git a/Kernel/Syscalls/mmap.cpp b/Kernel/Syscalls/mmap.cpp index 42e56d2edd..b38521176a 100644 --- a/Kernel/Syscalls/mmap.cpp +++ b/Kernel/Syscalls/mmap.cpp @@ -480,7 +480,7 @@ ErrorOr<FlatPtr> Process::sys$munmap(Userspace<void*> addr, size_t size) ErrorOr<FlatPtr> Process::sys$mremap(Userspace<Syscall::SC_mremap_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)); |