From 078faac9e8b6c8124bc012bbf97cca59caf6d4ea Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Tue, 20 Mar 2018 21:25:57 +0100 Subject: ipc: add msgrcv syscall/compat_syscall wrappers Provide ksys_msgrcv() and compat_ksys_msgrcv() 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_msgrcv() and compat_sys_msgrcv(). 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 Cc: Andrew Morton Signed-off-by: Dominik Brodowski --- ipc/syscall.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'ipc/syscall.c') diff --git a/ipc/syscall.c b/ipc/syscall.c index aa29b0802e26..0228c7afd882 100644 --- a/ipc/syscall.c +++ b/ipc/syscall.c @@ -59,11 +59,11 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second, (struct ipc_kludge __user *) ptr, sizeof(tmp))) return -EFAULT; - return sys_msgrcv(first, tmp.msgp, second, + return ksys_msgrcv(first, tmp.msgp, second, tmp.msgtyp, third); } default: - return sys_msgrcv(first, + return ksys_msgrcv(first, (struct msgbuf __user *) ptr, second, fifth, third); } @@ -156,10 +156,10 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, return -EINVAL; if (copy_from_user(&ipck, uptr, sizeof(ipck))) return -EFAULT; - return compat_sys_msgrcv(first, ipck.msgp, second, + return compat_ksys_msgrcv(first, ipck.msgp, second, ipck.msgtyp, third); } - return compat_sys_msgrcv(first, ptr, second, fifth, third); + return compat_ksys_msgrcv(first, ptr, second, fifth, third); } case MSGGET: return ksys_msgget(first, second); -- cgit v1.2.3-59-g8ed1b