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| author | John David Anglin <dave.anglin@bell.net> | 2019-04-15 02:20:40 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-05-04 00:47:40 +0300 |
| commit | 9e5c602186a692a7e848c0da17aed40f49d30519 (patch) | |
| tree | 845499e6cc5d1ee17c786233d9a427ab44c2bb6b /net/lapb/lapb_timer.c | |
| parent | 6c63ef80014b60ab13bee7e683d0a95521bb7fdd (diff) | |
| download | linux-9e5c602186a692a7e848c0da17aed40f49d30519.tar.xz | |
parisc: Use ldcw instruction for SMP spinlock release barrier
There are only a couple of instructions that can function as a memory
barrier on parisc. Currently, we use the sync instruction as a memory
barrier when releasing a spinlock. However, the ldcw instruction is a
better barrier when we have a handy memory location since it operates in
the cache on coherent machines.
This patch updates the spinlock release code to use ldcw. I also
changed the "stw,ma" instructions to "stw" instructions as it is not an
adequate barrier.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions