diff options
author | mjacob <mjacob@FreeBSD.org> | 2002-11-10 16:16:44 +0000 |
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committer | mjacob <mjacob@FreeBSD.org> | 2002-11-10 16:16:44 +0000 |
commit | d00e94bfc6ad609cc7e33749154f06f9f3c7d325 (patch) | |
tree | 90dbbf3448aec98fbc1da92f040e86f7f1cecadf /sys/vm | |
parent | c04706a1260c50515ae805da5efdc4cddfb973cb (diff) | |
download | FreeBSD-src-d00e94bfc6ad609cc7e33749154f06f9f3c7d325.zip FreeBSD-src-d00e94bfc6ad609cc7e33749154f06f9f3c7d325.tar.gz |
Use atomic_set_8 on the us_freelist maps as they are not otherwise
protected. Furthermore, in some RISC architectures with no normal
byte operations, the surrounding 3 bytes are also affected by the
read-modify-write that has to occur.
Diffstat (limited to 'sys/vm')
-rw-r--r-- | sys/vm/uma_dbg.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/vm/uma_dbg.c b/sys/vm/uma_dbg.c index cea5371..a1009e9 100644 --- a/sys/vm/uma_dbg.c +++ b/sys/vm/uma_dbg.c @@ -230,7 +230,7 @@ uma_dbg_alloc(uma_zone_t zone, uma_slab_t slab, void *item) freei = ((unsigned long)item - (unsigned long)slab->us_data) / zone->uz_rsize; - slab->us_freelist[freei] = 255; + atomic_set_8(&slab->us_freelist[freei], 255); return; } @@ -279,5 +279,5 @@ uma_dbg_free(uma_zone_t zone, uma_slab_t slab, void *item) * Until then the count of valid slabs will make sure we don't * accidentally follow this and assume it's a valid index. */ - slab->us_freelist[freei] = 0; + atomic_set_8(&slab->us_freelist[freei], 0); } |