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Kernel: Mark sys$lseek() as not needing the big lock

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This syscall doesn't access any data that was implicitly protected by
the big lock.
This commit is contained in:
Andreas Kling 2022-03-08 16:39:58 +01:00
parent 09e644f0ba
commit 7b3642d08c
2 changed files with 2 additions and 2 deletions
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2
Kernel/API/Syscall.h
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@ -111,7 +111,7 @@ enum class NeedsBigProcessLock {
S(killpg, NeedsBigProcessLock::Yes) \ S(killpg, NeedsBigProcessLock::Yes) \
S(link, NeedsBigProcessLock::Yes) \ S(link, NeedsBigProcessLock::Yes) \
S(listen, NeedsBigProcessLock::Yes) \ S(listen, NeedsBigProcessLock::Yes) \
S(lseek, NeedsBigProcessLock::Yes) \ S(lseek, NeedsBigProcessLock::No) \
S(madvise, NeedsBigProcessLock::Yes) \ S(madvise, NeedsBigProcessLock::Yes) \
S(map_time_page, NeedsBigProcessLock::Yes) \ S(map_time_page, NeedsBigProcessLock::Yes) \
S(mkdir, NeedsBigProcessLock::Yes) \ S(mkdir, NeedsBigProcessLock::Yes) \

2
Kernel/Syscalls/lseek.cpp
View file

@ -11,7 +11,7 @@ namespace Kernel {
ErrorOr<FlatPtr> Process::sys$lseek(int fd, Userspace<off_t*> userspace_offset, int whence) ErrorOr<FlatPtr> Process::sys$lseek(int fd, Userspace<off_t*> userspace_offset, int whence)
{ {
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::stdio)); TRY(require_promise(Pledge::stdio));
auto description = TRY(open_file_description(fd)); auto description = TRY(open_file_description(fd));
off_t offset; off_t offset;