Unlock umask(2)

[Vitaliy Makkoveev]

sys_umask() only modifies `fd_cmask', which modification is already
protected by `fd_lock' rwlock(9).

Index: sys/kern/syscalls.master
===================================================================
RCS file: /cvs/src/sys/kern/syscalls.master,v
retrieving revision 1.223
diff -u -p -r1.223 syscalls.master
--- sys/kern/syscalls.master    24 Feb 2022 07:41:51 -0000      1.223
+++ sys/kern/syscalls.master    11 May 2022 08:14:59 -0000
@@ -146,7 +146,7 @@
                            char *buf, size_t count); }
 59     STD             { int sys_execve(const char *path, \
                            char * const *argp, char * const *envp); }
-60     STD             { mode_t sys_umask(mode_t newmask); }
+60     STD NOLOCK      { mode_t sys_umask(mode_t newmask); }
 61     STD             { int sys_chroot(const char *path); }
 62     STD             { int sys_getfsstat(struct statfs *buf, size_t bufsize, 
\
                            int flags); }