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| author | Philipp Rudo <prudo@linux.ibm.com> | 2020-04-06 14:47:48 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-10 10:30:09 +0200 |
| commit | bbe15f16e5c5cb24c855efd6102c1074740da514 (patch) | |
| tree | e6e6167a6045feaccc290a6fdd599bea2854ef19 /scripts | |
| parent | 6c662c519277d9d94f4d146b7c05e67a426b91a7 (diff) | |
s390/ftrace: fix potential crashes when switching tracers
[ Upstream commit 8ebf6da9db1b2a20bb86cc1bee2552e894d03308 ]
Switching tracers include instruction patching. To prevent that a
instruction is patched while it's read the instruction patching is done
in stop_machine 'context'. This also means that any function called
during stop_machine must not be traced. Thus add 'notrace' to all
functions called within stop_machine.
Fixes: 1ec2772e0c3c ("s390/diag: add a statistic for diagnose calls")
Fixes: 38f2c691a4b3 ("s390: improve wait logic of stop_machine")
Fixes: 4ecf0a43e729 ("processor: get rid of cpu_relax_yield")
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions