linux

iv/linux

History

John David Anglin c6a13329a4 parisc: Avoid calling faulthandler_disabled() twice

[ Upstream commit 9e9d4b460f23bab61672eae397417d03917d116c ]

In handle_interruption(), we call faulthandler_disabled() to check whether the
fault handler is not disabled. If the fault handler is disabled, we immediately
call do_page_fault(). It then calls faulthandler_disabled(). If disabled,
do_page_fault() attempts to fixup the exception by jumping to no_context:

no_context:

        if (!user_mode(regs) && fixup_exception(regs)) {
                return;
        }

        parisc_terminate("Bad Address (null pointer deref?)", regs, code, address);

Apart from the error messages, the two blocks of code perform the same
function.

We can avoid two calls to faulthandler_disabled() by a simple revision
to the code in handle_interruption().

Note: I didn't try to fix the formatting of this code block.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-01-27 09:04:28 +01:00

boot

parisc: Fix build of compressed kernel even with debug enabled

2019-08-06 19:06:55 +02:00

configs

net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros.

2017-09-04 13:25:20 +02:00

include

parisc: Use absolute_pointer() to define PAGE0

2021-10-06 15:31:17 +02:00

kernel

parisc: Avoid calling faulthandler_disabled() twice