ipc: add shmctl syscall/compat_syscall wrappers
Provide ksys_shmctl() and compat_ksys_shmctl() wrappers to avoid in-kernel
calls to these syscalls. The ksys_ prefix denotes that these functions are
meant as a drop-in replacement for the syscalls. In particular, they use
the same calling convention as sys_shmctl() and compat_sys_shmctl().
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>
diff --git a/ipc/syscall.c b/ipc/syscall.c
index b3aa715..34bbabc 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -94,7 +94,7 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
case SHMGET:
return ksys_shmget(first, second, third);
case SHMCTL:
- return sys_shmctl(first, second,
+ return ksys_shmctl(first, second,
(struct shmid_ds __user *) ptr);
default:
return -ENOSYS;
@@ -182,7 +182,7 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
case SHMGET:
return ksys_shmget(first, (unsigned int)second, third);
case SHMCTL:
- return compat_sys_shmctl(first, second, compat_ptr(ptr));
+ return compat_ksys_shmctl(first, second, compat_ptr(ptr));
}
return -ENOSYS;