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    Subject[PATCH 3.17 054/141] xtensa: re-wire umount syscall to sys_oldumount
    Date
    3.17-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Max Filippov <jcmvbkbc@gmail.com>

    commit 2651cc6974d47fc43bef1cd8cd26966e4f5ba306 upstream.

    Userspace actually passes single parameter (path name) to the umount
    syscall, so new umount just fails. Fix it by requesting old umount
    syscall implementation and re-wiring umount to it.

    Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/xtensa/include/uapi/asm/unistd.h | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/arch/xtensa/include/uapi/asm/unistd.h
    +++ b/arch/xtensa/include/uapi/asm/unistd.h
    @@ -384,7 +384,8 @@ __SYSCALL(174, sys_chroot, 1)
    #define __NR_pivot_root 175
    __SYSCALL(175, sys_pivot_root, 2)
    #define __NR_umount 176
    -__SYSCALL(176, sys_umount, 2)
    +__SYSCALL(176, sys_oldumount, 1)
    +#define __ARCH_WANT_SYS_OLDUMOUNT
    #define __NR_swapoff 177
    __SYSCALL(177, sys_swapoff, 1)
    #define __NR_sync 178



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