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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-20 19:53:58 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:22 +0200
commit69894718a515fef7ff633cf354fcd7ed73a88891 (patch)
tree1330521d67fa886f829af4d8e5a6677b826eaaf4 /ipc/sem.c
parentipc: add semtimedop syscall/compat_syscall wrappers (diff)
downloadlinux-dev-69894718a515fef7ff633cf354fcd7ed73a88891.tar.xz
linux-dev-69894718a515fef7ff633cf354fcd7ed73a88891.zip
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>
Diffstat (limited to 'ipc/sem.c')
-rw-r--r--ipc/sem.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index e21ceb8b4af1..2e5f7ec7a7db 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -556,7 +556,7 @@ static inline int sem_more_checks(struct kern_ipc_perm *ipcp,
return 0;
}
-SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
+long ksys_semget(key_t key, int nsems, int semflg)
{
struct ipc_namespace *ns;
static const struct ipc_ops sem_ops = {
@@ -578,6 +578,11 @@ SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
return ipcget(ns, &sem_ids(ns), &sem_ops, &sem_params);
}
+SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
+{
+ return ksys_semget(key, nsems, semflg);
+}
+
/**
* perform_atomic_semop[_slow] - Attempt to perform semaphore
* operations on a given array.