ipc: add semget syscall wrapper

Provide ksys_semget() wrapper to avoid in-kernel calls to this syscall.
The ksys_ prefix denotes that this function is meant as a drop-in
replacement for the syscall. In particular, it uses the same calling
convention as sys_semget().

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/ipc/syscall.c b/ipc/syscall.c
index 84d6a7691baa..21fcdf0b4836 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -35,7 +35,7 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
                                        (const struct timespec __user *)fifth);
 
         case SEMGET:
-                return sys_semget(first, second, third);
+                return ksys_semget(first, second, third);
         case SEMCTL: {
                 unsigned long arg;
                 if (!ptr)
@@ -132,7 +132,7 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
                 return compat_ksys_semtimedop(first, compat_ptr(ptr), second,
                                                 compat_ptr(fifth));
         case SEMGET:
-                return sys_semget(first, second, third);
+                return ksys_semget(first, second, third);
         case SEMCTL:
                 if (!ptr)
                         return -EINVAL;