m68knommu: fix syscall tracing stuck process

The return path from an exception was checking too many bits in the
thread_info->flags, and getting stuck calling do_signal(). There was
no work to do, we should only be checking the low 8 bits (as per comments
and definitions in arch/m68k/include/asm/thread_info.h).

This fixes the stuck process problem when using strace.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

diff --git a/arch/m68k/platform/coldfire/entry.S b/arch/m68k/platform/coldfire/entry.S
index 863889fc31c9c1fe2b0ad7a9b460a8627a14a56c..281e38c2b6c74976c1c5da0ee061b51ce9335a4c 100644 (file)
--- a/arch/m68k/platform/coldfire/entry.S
+++ b/arch/m68k/platform/coldfire/entry.S
@@ -136,7 +136,7 @@ Luser_return:
        movel   %sp,%d1                 /* get thread_info pointer */
        andl    #-THREAD_SIZE,%d1       /* at base of kernel stack */
        movel   %d1,%a0
-       movel   %a0@(TINFO_FLAGS),%d1   /* get thread_info->flags */
+       moveb   %a0@(TINFO_FLAGS+3),%d1 /* thread_info->flags (low 8 bits) */
        jne     Lwork_to_do             /* still work to do */
 
 Lreturn:
@@ -148,8 +148,6 @@ Lwork_to_do:
        btst    #TIF_NEED_RESCHED,%d1
        jne     reschedule
 
-       /* GERG: do we need something here for TRACEing?? */
-
 Lsignal_return:
        subql   #4,%sp                  /* dummy return address */
        SAVE_SWITCH_STACK