make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect

... and switch i386 to HAVE_SYSCALL_WRAPPERS, killing open-coded
uses of asmlinkage_protect() in a bunch of syscalls.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 12 insertions, 53 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 51e485c..25d0108 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1629,9 +1629,6 @@ SYSCALL_DEFINE5(waitid, int, which, pid_t, upid, struct siginfo __user *,
 	}
 
 	put_pid(pid);
-
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(5, ret, which, upid, infop, options, ru);
 	return ret;
 }
 
@@ -1669,8 +1666,6 @@ SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr,
 	ret = do_wait(&wo);
 	put_pid(pid);
 
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(4, ret, upid, stat_addr, options, ru);
 	return ret;
 }
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 8d932b1..e1f34ab 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1674,10 +1674,7 @@ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
 		 int, tls_val)
 #endif
 {
-	long ret = do_fork(clone_flags, newsp, 0, parent_tidptr, child_tidptr);
-	asmlinkage_protect(5, ret, clone_flags, newsp,
-			parent_tidptr, child_tidptr, tls_val);
-	return ret;
+	return do_fork(clone_flags, newsp, 0, parent_tidptr, child_tidptr);
 }
 #endif
 
diff --git a/kernel/uid16.c b/kernel/uid16.c
index d7948eb..f6c83d7 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -18,67 +18,43 @@
 
 SYSCALL_DEFINE3(chown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
 {
-	long ret = sys_chown(filename, low2highuid(user), low2highgid(group));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(3, ret, filename, user, group);
-	return ret;
+	return sys_chown(filename, low2highuid(user), low2highgid(group));
 }
 
 SYSCALL_DEFINE3(lchown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
 {
-	long ret = sys_lchown(filename, low2highuid(user), low2highgid(group));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(3, ret, filename, user, group);
-	return ret;
+	return sys_lchown(filename, low2highuid(user), low2highgid(group));
 }
 
 SYSCALL_DEFINE3(fchown16, unsigned int, fd, old_uid_t, user, old_gid_t, group)
 {
-	long ret = sys_fchown(fd, low2highuid(user), low2highgid(group));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(3, ret, fd, user, group);
-	return ret;
+	return sys_fchown(fd, low2highuid(user), low2highgid(group));
 }
 
 SYSCALL_DEFINE2(setregid16, old_gid_t, rgid, old_gid_t, egid)
 {
-	long ret = sys_setregid(low2highgid(rgid), low2highgid(egid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(2, ret, rgid, egid);
-	return ret;
+	return sys_setregid(low2highgid(rgid), low2highgid(egid));
 }
 
 SYSCALL_DEFINE1(setgid16, old_gid_t, gid)
 {
-	long ret = sys_setgid(low2highgid(gid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(1, ret, gid);
-	return ret;
+	return sys_setgid(low2highgid(gid));
 }
 
 SYSCALL_DEFINE2(setreuid16, old_uid_t, ruid, old_uid_t, euid)
 {
-	long ret = sys_setreuid(low2highuid(ruid), low2highuid(euid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(2, ret, ruid, euid);
-	return ret;
+	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
 }
 
 SYSCALL_DEFINE1(setuid16, old_uid_t, uid)
 {
-	long ret = sys_setuid(low2highuid(uid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(1, ret, uid);
-	return ret;
+	return sys_setuid(low2highuid(uid));
 }
 
 SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid)
 {
-	long ret = sys_setresuid(low2highuid(ruid), low2highuid(euid),
+	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
 				 low2highuid(suid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(3, ret, ruid, euid, suid);
-	return ret;
 }
 
 SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruidp, old_uid_t __user *, euidp, old_uid_t __user *, suidp)
@@ -100,11 +76,8 @@ SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruidp, old_uid_t __user *, euid
 
 SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid)
 {
-	long ret = sys_setresgid(low2highgid(rgid), low2highgid(egid),
+	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
 				 low2highgid(sgid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(3, ret, rgid, egid, sgid);
-	return ret;
 }
 
 
@@ -127,18 +100,12 @@ SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgidp, old_gid_t __user *, egid
 
 SYSCALL_DEFINE1(setfsuid16, old_uid_t, uid)
 {
-	long ret = sys_setfsuid(low2highuid(uid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(1, ret, uid);
-	return ret;
+	return sys_setfsuid(low2highuid(uid));
 }
 
 SYSCALL_DEFINE1(setfsgid16, old_gid_t, gid)
 {
-	long ret = sys_setfsgid(low2highgid(gid));
-	/* avoid REGPARM breakage on x86: */
-	asmlinkage_protect(1, ret, gid);
-	return ret;
+	return sys_setfsgid(low2highgid(gid));
 }
 
 static int groups16_to_user(old_gid_t __user *grouplist,