diff options
| author |   James Hogan <james.hogan@imgtec.com> | 2017-05-31 16:19:48 +0100 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2017-06-28 12:22:40 +0200 |
| commit | 49955d84cd9ccdca5a16a495e448e1a06fad9e49 (patch) | |
| tree | 6079d40979a3343c3d93e69e665e7f06176f8676 /arch/mips/kernel/scall64-n32.S | |
| parent | MIPS: Fix mips_atomic_set() retry condition (diff) | |
| download | linux-dev-49955d84cd9ccdca5a16a495e448e1a06fad9e49.tar.xz linux-dev-49955d84cd9ccdca5a16a495e448e1a06fad9e49.zip | |
MIPS: Save static registers before sysmips
The MIPS sysmips system call handler may return directly from the
MIPS_ATOMIC_SET case (mips_atomic_set()) to syscall_exit. This path
restores the static (callee saved) registers, however they won't have
been saved on entry to the system call.
Use the save_static_function() macro to create a __sys_sysmips wrapper
function which saves the static registers before calling sys_sysmips, so
that the correct static register state is restored by syscall_exit.
Fixes: f1e39a4a616c ("MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16149/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/scall64-n32.S')
| -rw-r--r-- | arch/mips/kernel/scall64-n32.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 90bad2d1b2d3..cbf190ef9e8a 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -302,7 +302,7 @@ EXPORT(sysn32_call_table) PTR compat_sys_sched_getaffinity PTR sys_cacheflush PTR sys_cachectl - PTR sys_sysmips + PTR __sys_sysmips PTR compat_sys_io_setup /* 6200 */ PTR sys_io_destroy PTR compat_sys_io_getevents |