From 65749e0bb5e7de876ee43d3f601e32afe17e9248 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Tue, 20 Mar 2018 20:07:53 +0100 Subject: ipc: add shmget syscall wrapper Provide ksys_shmget() 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_shmget(). 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/shm.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'ipc/shm.c') diff --git a/ipc/shm.c b/ipc/shm.c index 4643865e9171..9f3cdb259a51 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -656,7 +656,7 @@ static inline int shm_more_checks(struct kern_ipc_perm *ipcp, return 0; } -SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg) +long ksys_shmget(key_t key, size_t size, int shmflg) { struct ipc_namespace *ns; static const struct ipc_ops shm_ops = { @@ -675,6 +675,11 @@ SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg) return ipcget(ns, &shm_ids(ns), &shm_ops, &shm_params); } +SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg) +{ + return ksys_shmget(key, size, shmflg); +} + static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_ds *in, int version) { switch (version) { -- cgit