diff options
| author | John David Anglin <[email protected]> | 2017-09-30 17:24:23 -0400 |
|---|---|---|
| committer | Helge Deller <[email protected]> | 2017-10-19 08:48:44 +0200 |
| commit | 374b3bf8e8b519f61eb9775888074c6e46b3bf0c (patch) | |
| tree | f3bf23769e2de1a8e6c8e3b9486a7221e6fc56cf /lib/flex_array.c | |
| parent | 73d3393ada4f70fa3df5639c8d438f2f034c0ecb (diff) | |
parisc: Fix double-word compare and exchange in LWS code on 32-bit kernels
As discussed on the debian-hppa list, double-wordcompare and exchange
operations fail on 32-bit kernels. Looking at the code, I realized that
the ",ma" completer does the wrong thing in the "ldw,ma 4(%r26), %r29"
instruction. This increments %r26 and causes the following store to
write to the wrong location.
Note by Helge Deller:
The patch applies cleanly to stable kernel series if this upstream
commit is merged in advance:
f4125cfdb300 ("parisc: Avoid trashing sr2 and sr3 in LWS code").
Signed-off-by: John David Anglin <[email protected]>
Tested-by: Christoph Biedl <[email protected]>
Fixes: 89206491201c ("parisc: Implement new LWS CAS supporting 64 bit operations.")
Cc: [email protected] # 3.13+
Signed-off-by: Helge Deller <[email protected]>
Diffstat (limited to 'lib/flex_array.c')
0 files changed, 0 insertions, 0 deletions