commit 80b8585b07feede94a742c4cdb80ab607a8813b3
author Wu Zhangjin <wuzhangjin@gmail.com> Sat Oct 10 19:19:49 2009 +0800
committer Ralf Baechle <ralf@linux-mips.org> Mon Nov 02 12:00:02 2009 +0100
tree bce54a378a08e8fec975e024ca8b598a14343903
parent a22d621c80fb08f668ae3bfe62aeaae64b0b2b89

MIPS: 64-bit: Fix o32 lookup_dcookie syscall

An o32 aplication passes a 64-bit value in a pair of registers; a 64-bit
kernel expects a 64-bit argument in a single register.

Signed-off-by: Chen Jie <chenj@lemote.com>
Signed-off-by: Hu Hongbing <huhb@lemote.com>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/linux32.c

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6242bc6..b77fefa 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -428,3 +428,9 @@
 	return do_fork(clone_flags, newsp, &regs, 0,
 	               parent_tidptr, child_tidptr);
 }
+
+asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
+	size_t len)
+{
+	return sys_lookup_dcookie(merge_64(a0, a1), buf, len);
+}

arch/mips/kernel/scall64-o32.S

diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 9bbf977..ba0dde6 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -450,7 +450,7 @@
 	PTR	sys_io_submit
 	PTR	sys_io_cancel			/* 4245 */
 	PTR	sys_exit_group
-	PTR	sys_lookup_dcookie
+	PTR	sys32_lookup_dcookie
 	PTR	sys_epoll_create
 	PTR	sys_epoll_ctl
 	PTR	sys_epoll_wait			/* 4250 */