On 10/18/2016 12:24 AM, Guenter Roeck wrote:
Since the oldabi syscall interface was first introduced, the infrastructure
changed and the patch no longer compiles. See commit f56141e3e2d9a ("all
arches, signal: move restart_block to struct task_struct") for details.

Fixes: 1ace5d1e3d4b4 ("unicore32-oldabi: add oldabi syscall interface")
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
Should be merged with the commit introducing the problem if possible.


Additional comment: Even with this patch applied, the image does not boot with
qemu in -next. Here is a partial log:

...
Memory: 441012K/524288K available (1923K kernel code, 76K rwdata, 312K rodata, 
2212K init, 175K bss, 83276K reserved, 0K cma-reserved)^M
Virtual kernel memory layout:^M
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)^M
    vmalloc : 0xe0800000 - 0xff000000   ( 488 MB)^M
    lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)^M
    modules : 0xbf000000 - 0xc0000000   (  16 MB)^M
      .init : 0xc0408000 - 0xc0631000   (2212 kB)^M
      .text : 0xc0631000 - 0xc0811e20   (1924 kB)^M
      .data : 0xc0811e20 - 0xc0873160   ( 389 kB)^M
------------[ cut here ]------------^M
WARNING: CPU: 0 PID: 0 at mm/percpu.c:996 pcpu_alloc+0x528/0x5d4^M

The code then loops forever repeating this warning and the associated traceback.

Guenter

 arch/unicore32/kernel/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/unicore32/kernel/signal.c b/arch/unicore32/kernel/signal.c
index 78a66491b108..be75ef8c1e0c 100644
--- a/arch/unicore32/kernel/signal.c
+++ b/arch/unicore32/kernel/signal.c
@@ -115,7 +115,7 @@ asmlinkage int __sys_sigreturn(struct pt_regs *regs)
        struct sigframe __user *frame;

        /* Always make any pending restarted system calls return -EINTR */
-       current_thread_info()->restart_block.fn = do_no_restart_syscall;
+       current->restart_block.fn = do_no_restart_syscall;

        /*
         * Since we stacked the signal on a 64-bit boundary,


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