RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 13:07:46 +00:00
Code Issues Activity Actions

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

Browse source 
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 14:00:38 +03:00
parent cb62ffbb8a
commit 0e564240a6
2 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Kernel/API/Syscall.h
View file

@ -121,7 +121,7 @@ enum class NeedsBigProcessLock {
S(link, NeedsBigProcessLock::No) \
S(listen, NeedsBigProcessLock::No) \
S(lseek, NeedsBigProcessLock::No) \
S(madvise, NeedsBigProcessLock::Yes) \
S(madvise, NeedsBigProcessLock::No) \
S(map_time_page, NeedsBigProcessLock::Yes) \
S(mkdir, NeedsBigProcessLock::No) \
S(mknod, NeedsBigProcessLock::No) \

2
Kernel/Syscalls/mmap.cpp
View file

@ -407,7 +407,7 @@ ErrorOr<FlatPtr> Process::sys$mprotect(Userspace<void*> addr, size_t size, int p
ErrorOr<FlatPtr> Process::sys$madvise(Userspace<void*> address, size_t size, int advice)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::stdio));
auto range_to_madvise = TRY(Memory::expand_range_to_page_boundaries(address.ptr(), size));