path: root/ipc/shm.c
diff options
authorDominik Brodowski <>2018-03-20 20:07:53 +0100
committerDominik Brodowski <>2018-04-02 20:15:24 +0200
commit65749e0bb5e7de876ee43d3f601e32afe17e9248 (patch)
treeb660b2e32014e8fb2a405c7d75f7dba0095e1f49 /ipc/shm.c
parent3d65661a494a11266500c2532b4f163537c379db (diff)
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 Cc: Al Viro <> Cc: Andrew Morton <> Signed-off-by: Dominik Brodowski <>
Diffstat (limited to 'ipc/shm.c')
1 files changed, 6 insertions, 1 deletions
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) {