diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-12-22 10:17:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-12-22 10:17:16 -0800 |
| commit | 3f066e882bf1373db023ada606e0dca1af375d9b (patch) | |
| tree | cce26aaf008037df6baa11fbeb6aaf14200a9339 /arch/parisc/kernel/traps.c | |
| parent | 074004058094a07f784c8162153fa44c1e05596b (diff) | |
| parent | aacb2016063dfa6da9378d76734cd9dc1e977619 (diff) | |
Merge tag 'for-5.16/parisc-7' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc architecture fixes from Helge Deller:
- Fix a bug in the C code which calculates the relevant futex spinlock
based on the futex virtual address. In some cases a wrong spinlock
(compared to what is calculated in the assembly code path) was
choosen which then can lead to deadlocks.
- The 64-bit kernel missed to clip the LWS number in the
Light-weight-syscall path for 32-bit processes.
- Prevent CPU register dump to show stale value in IIR register on
access rights traps.
- Remove unused ARCH_DEFCONFIG entries.
* tag 'for-5.16/parisc-7' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: remove ARCH_DEFCONFIG
parisc: Fix mask used to select futex spinlock
parisc: Correct completer in lws start
parisc: Clear stale IIR value on instruction access rights trap
Diffstat (limited to 'arch/parisc/kernel/traps.c')
| -rw-r--r-- | arch/parisc/kernel/traps.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index b11fb26ce299..892b7fc8f3c4 100644 --- a/arch/parisc/kernel/traps.c +++ b/arch/parisc/kernel/traps.c @@ -730,6 +730,8 @@ void notrace handle_interruption(int code, struct pt_regs *regs) } mmap_read_unlock(current->mm); } + /* CPU could not fetch instruction, so clear stale IIR value. */ + regs->iir = 0xbaadf00d; fallthrough; case 27: /* Data memory protection ID trap */ |