net: socket: replace call to sys_recv() with __sys_recvfrom()

sys_recv() merely expands the parameters to __sys_recvfrom() by NULL and NULL. Open-code this in the two places which used sys_recv() as a wrapper to __sys_recvfrom(). 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/[email protected] Cc: David S. Miller <[email protected]> Cc: [email protected] Signed-off-by: Dominik Brodowski <[email protected]>
bignaux · Apr 2, 2018 · d27e9af · d27e9af
1 parent f3bf896
commit d27e9af
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/net/compat.c b/net/compat.c
@@ -755,7 +755,8 @@ COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, uns
 
 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
 {
-	return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
+	return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, NULL,
+			      NULL);
 }
 
 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,

diff --git a/net/socket.c b/net/socket.c
@@ -2566,7 +2566,8 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
 				   (struct sockaddr __user *)a[4], a[5]);
 		break;
 	case SYS_RECV:
-		err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
+		err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
+				     NULL, NULL);
 		break;
 	case SYS_RECVFROM:
 		err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3],