linux-stable/arch/nios2
Al Viro 8af269e5bd nios2: add force_successful_syscall_return()
commit fd0c153daa upstream.

If we use the ancient SysV syscall ABI, we'd better have tell the
kernel how to claim that a negative return value is a success.
Use ->orig_r2 for that - it's inaccessible via ptrace, so it's
a fair game for changes and it's normally[*] non-negative on return
from syscall.  Set to -1; syscall is not going to be restart-worthy
by definition, so we won't interfere with that use either.

[*] the only exception is rt_sigreturn(), where we skip the entire
messing with r1/r2 anyway.

Fixes: 82ed08dd1b ("nios2: Exception handling")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-25 11:40:19 +02:00
..
boot nios2 update for v5.7-rc1 2020-04-11 11:38:44 -07:00
configs sysctl: Remove the sysctl system call 2019-11-26 13:03:56 -06:00
include nios2: add force_successful_syscall_return() 2022-08-25 11:40:19 +02:00
kernel nios2: add force_successful_syscall_return() 2022-08-25 11:40:19 +02:00
lib treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
mm mm: move mem_init_print_info() into mm_init() 2021-04-30 11:20:42 -07:00
platform nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST 2021-10-27 09:29:07 -05:00
Kbuild kbuild: require all architectures to have arch/$(SRCARCH)/Kbuild 2021-05-26 23:10:37 +09:00
Kconfig Tracing updates for 5.15: 2021-09-05 11:50:41 -07:00
Kconfig.debug NIOS2: fix kconfig unmet dependency warning for SERIAL_CORE_CONSOLE 2021-09-24 08:49:39 -05:00
Makefile kbuild: consolidate Devicetree dtb build rules 2018-10-02 09:23:21 -05:00