diff options
| author | John David Anglin <[email protected]> | 2022-06-18 15:14:34 +0000 |
|---|---|---|
| committer | Helge Deller <[email protected]> | 2022-06-26 12:23:15 +0200 |
| commit | e9ed22e6e5010997a2f922eef61ca797d0a2a246 (patch) | |
| tree | 0d7e7676ffe3f53fc08a57dbf7950613946b9b0f /include/linux/fpga/fpga-mgr.h | |
| parent | d16c5c7c925658ea94689dfe4469441f7fd59f00 (diff) | |
parisc: Fix flush_anon_page on PA8800/PA8900
Anonymous pages are allocated with the shared mappings colouring,
SHM_COLOUR. Since the alias boundary on machines with PA8800 and
PA8900 processors is unknown, flush_user_cache_page() might not
flush all mappings of a shared anonymous page. Flushing the whole
data cache flushes all mappings.
This won't fix all coherency issues with shared mappings but it
seems to work well in practice. I haven't seen any random memory
faults in almost a month on a rp3440 running as a debian buildd
machine.
There is a small preformance hit.
Signed-off-by: John David Anglin <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
Cc: [email protected] # v5.18+
Diffstat (limited to 'include/linux/fpga/fpga-mgr.h')
0 files changed, 0 insertions, 0 deletions