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Max Filippov bac4cadeb7 xtensa: fix a7 clobbering in coprocessor context load/store 
commit 839769c35477d4acc2369e45000ca7b0b6af39a7 upstream.

Fast coprocessor exception handler saves a3..a6, but coprocessor context
load/store code uses a4..a7 as temporaries, potentially clobbering a7.
'Potentially' because coprocessor state load/store macros may not use
all four temporary registers (and neither FPU nor HiFi macros do).
Use a3..a6 as intended.

Cc: stable@vger.kernel.org
Fixes: c658eac628aa ("[XTENSA] Add support for configurable registers and coprocessors")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-27 14:38:59 +02:00
..
alpha
rtc: Check return value from mc146818_get_time()
2022-04-13 20:59:14 +02:00
arc
uaccess: fix type mismatch warnings from access_ok()
2022-04-08 14:24:01 +02:00
arm
ARM: vexpress/spc: Avoid negative array index when !SMP
2022-04-27 14:38:55 +02:00
arm64
arm64: dts: imx: Fix imx8*-var-som touchscreen property sizes
2022-04-27 14:38:55 +02:00
csky
uaccess: fix type mismatch warnings from access_ok()
2022-04-08 14:24:01 +02:00
h8300
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
hexagon
uaccess: fix integer overflow on access_ok()
2022-03-28 09:58:45 +02:00
ia64
PCI/sysfs: Find shadow ROM before static attribute initialization
2022-02-01 17:27:05 +01:00
m68k
m68k: coldfire/device.c: only build for MCF_EDMA when h/w macros are defined
2022-04-08 14:23:20 +02:00
microblaze
uaccess: fix nios2 and microblaze get_user_8()
2022-04-08 14:23:18 +02:00
mips
MIPS: ingenic: correct unit node address
2022-04-13 20:59:09 +02:00
nds32
nds32: fix access_ok() checks in get/put_user
2022-03-28 09:58:46 +02:00
nios2
uaccess: fix type mismatch warnings from access_ok()
2022-04-08 14:24:01 +02:00
openrisc
openrisc: Add clone3 ABI wrapper
2022-01-27 11:04:10 +01:00
parisc
parisc: Fix patch code locking and flushing
2022-04-13 20:59:14 +02:00
powerpc
powerpc/perf: Fix power10 event alternatives
2022-04-27 14:38:59 +02:00
riscv
riscv: Fixed misaligned memory access. Fixed pointer comparison.
2022-04-13 20:59:09 +02:00
s390
s390/extable: fix exception table sorting
2022-03-08 19:12:48 +01:00
sh
Documentation, arch: Remove leftovers from CIFS_WEAK_PW_HASH
2022-01-27 11:05:21 +01:00
sparc
uaccess: fix type mismatch warnings from access_ok()
2022-04-08 14:24:01 +02:00
um
um: fix and optimize xor select template for CONFIG64 and timetravel mode
2022-04-13 20:58:59 +02:00
x86
stat: fix inconsistency between struct stat and struct compat_stat
2022-04-27 14:38:57 +02:00
xtensa
xtensa: fix a7 clobbering in coprocessor context load/store
2022-04-27 14:38:59 +02:00
.gitignore
…
Kconfig
stack: Constrain and fix stack offset randomization with Clang builds
2022-04-08 14:23:06 +02:00