userfaultfd: activate syscall

This activates the userfaultfd syscall. [[email protected]: activate syscall fix] [[email protected]: don't enable userfaultfd on powerpc] Signed-off-by: Andrea Arcangeli <[email protected]> Acked-by: Pavel Emelyanov <[email protected]> Cc: Sanidhya Kashyap <[email protected]> Cc: [email protected] Cc: "Kirill A. Shutemov" <[email protected]> Cc: Andres Lagar-Cavilla <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Peter Feiner <[email protected]> Cc: "Dr. David Alan Gilbert" <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: "Huangpeng (Peter)" <[email protected]> Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Sep 4, 2015 · 1380fca · 1380fca
1 parent a14c151
commit 1380fca
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diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -380,3 +380,4 @@
 371	i386	recvfrom		sys_recvfrom			compat_sys_recvfrom
 372	i386	recvmsg			sys_recvmsg			compat_sys_recvmsg
 373	i386	shutdown		sys_shutdown
+374	i386	userfaultfd		sys_userfaultfd
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -329,6 +329,7 @@
 320	common	kexec_file_load		sys_kexec_file_load
 321	common	bpf			sys_bpf
 322	64	execveat		stub_execveat
+323	common	userfaultfd		sys_userfaultfd
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
@@ -810,6 +810,7 @@ asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr);
 asmlinkage long sys_eventfd(unsigned int count);
 asmlinkage long sys_eventfd2(unsigned int count, int flags);
 asmlinkage long sys_memfd_create(const char __user *uname_ptr, unsigned int flags);
+asmlinkage long sys_userfaultfd(int flags);
 asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
 asmlinkage long sys_old_readdir(unsigned int, struct old_linux_dirent __user *, unsigned int);
 asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,

diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
@@ -219,6 +219,7 @@ cond_syscall(compat_sys_timerfd_gettime);
 cond_syscall(sys_eventfd);
 cond_syscall(sys_eventfd2);
 cond_syscall(sys_memfd_create);
+cond_syscall(sys_userfaultfd);
 
 /* performance counters: */
 cond_syscall(sys_perf_event_open);