diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2022-02-10 16:08:29 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-01 21:05:10 +0100 |
| commit | e2aaae2d3677563c1bb6cd15fbddd701381823be (patch) | |
| tree | 7c4682cfe521a2d01aada62439692294799bb682 /tools/perf/scripts/python/stackcollapse.py | |
| parent | f0003a9e4c18ae71308fb6b24de8248ac6180777 (diff) | |
s390/mm: add set_pXd()/set_pte() helper functions
Add set_pXd()/set_pte() helper functions which must be used to update
page table entries. The new helpers use WRITE_ONCE() to make sure that
a page table entry is written to only once.
Without this the compiler could otherwise generate code which writes
several times to a page table entry when updating its contents from
invalid to valid, which could lead to surprising results especially
for multithreaded processes...
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions