From a78ee9ed2f828e1960f366bf7ab204e7f19924c7 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 9 Jul 2017 10:38:28 -0400
Subject: [PATCH] shmat(2): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
ipc/compat.c | 16 ----------------
ipc/shm.c | 19 +++++++++++++++++++
2 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/ipc/compat.c b/ipc/compat.c
index 0586687c3e319..871d07da0a529 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -80,22 +80,6 @@ void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
to->seq = from->seq;
}
-#ifndef COMPAT_SHMLBA
-#define COMPAT_SHMLBA SHMLBA
-#endif
-
-COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
-{
- unsigned long ret;
- long err;
-
- err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
- if (err)
- return err;
- force_successful_syscall_return();
- return (long)ret;
-}
-
COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
unsigned, nsops,
const struct compat_timespec __user *, timeout)
diff --git a/ipc/shm.c b/ipc/shm.c
index 2e31545035a64..342024de3b9d2 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1439,6 +1439,25 @@ SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg)
return (long)ret;
}
+#ifdef CONFIG_COMPAT
+
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+
+COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
+{
+ unsigned long ret;
+ long err;
+
+ err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
+ if (err)
+ return err;
+ force_successful_syscall_return();
+ return (long)ret;
+}
+#endif
+
/*
* detach and kill segment if marked destroyed.
* The work is done in shm_close.
--
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