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| author | Nicholas Piggin <npiggin@gmail.com> | 2017-07-29 14:50:27 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-07-31 12:22:37 +0200 |
| commit | cc491f1d3583146eaee635c86b9c9227fa835c6c (patch) | |
| tree | 5b2d43d7d4bf922f96f9eb5dd7485131360c4231 /arch/powerpc/platforms/83xx | |
| parent | Merge tag 'v4.13-rc1' into fixes (diff) | |
| download | linux-cc491f1d3583146eaee635c86b9c9227fa835c6c.tar.xz linux-cc491f1d3583146eaee635c86b9c9227fa835c6c.zip | |
powerpc/64s: Fix stack setup in watchdog soft_nmi_common()
The watchdog soft-NMI exception stack setup loads a stack pointer
twice, which is an obvious error. It ends up using the system reset
interrupt (true-NMI) stack, which is also a bug because the watchdog
could be preempted by a system reset interrupt that overwrites the
NMI stack.
Change the soft-NMI to use the "emergency stack". The current kernel
stack is not used, because of the longer-term goal to prevent
asynchronous stack access using soft-disable.
Fixes: 2104180a5369 ("powerpc/64s: implement arch-specific hardlockup watchdog")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/83xx')
0 files changed, 0 insertions, 0 deletions