mn10300: get rid of calling do_notify_resume() when returning to kernel mode
authorAl Viro <viro@zeniv.linux.org.uk>
Mon, 30 Apr 2012 23:49:23 +0000 (19:49 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Mon, 1 Oct 2012 13:58:09 +0000 (09:58 -0400)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
arch/mn10300/kernel/entry.S
arch/mn10300/kernel/signal.c

index 7dee5f6..0c631d3 100644 (file)
@@ -108,6 +108,10 @@ restore_all:
 ###############################################################################
        ALIGN
 syscall_exit_work:
+       mov     (REG_EPSW,fp),d0
+       and     EPSW_nSL,d0
+       beq     resume_kernel           # returning to supervisor mode
+
        btst    _TIF_SYSCALL_TRACE,d2
        beq     work_pending
        LOCAL_IRQ_ENABLE                # could let syscall_trace_exit() call
index 4d584ae..b2c0ac7 100644 (file)
@@ -475,11 +475,6 @@ static void do_signal(struct pt_regs *regs)
        siginfo_t info;
        int signr;
 
-       /* we want the common case to go fast, which is why we may in certain
-        * cases get here from kernel mode */
-       if (!user_mode(regs))
-               return;
-
        signr = get_signal_to_deliver(&info, &ka, regs, NULL);
        if (signr > 0) {
                if (handle_signal(signr, &info, &ka, regs) == 0) {