x86/entry/entry_32: Route int3 through common_exception

int3 is not using the common_exception path for purely historical reasons,
but there is no reason to keep it the only exception which is different.

Make it use common_exception so the upcoming changes to autogenerate the
entry stubs do not have to special case int3.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200225220217.042369808@linutronix.de

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index a8b4438..0753f48 100644 (file)
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1683,14 +1683,8 @@ SYM_CODE_END(nmi)
 SYM_CODE_START(int3)
        ASM_CLAC
        pushl   $-1                             # mark this as an int
-
-       SAVE_ALL switch_stacks=1
-       ENCODE_FRAME_POINTER
-       TRACE_IRQS_OFF
-       xorl    %edx, %edx                      # zero error code
-       movl    %esp, %eax                      # pt_regs pointer
-       call    do_int3
-       jmp     ret_from_exception
+       pushl   $do_int3
+       jmp     common_exception
 SYM_CODE_END(int3)
 
 SYM_CODE_START(general_protection)