diff options
| -rw-r--r-- | src/cmd/venti/srv/icache.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/cmd/venti/srv/icache.c b/src/cmd/venti/srv/icache.c index bf61612c..7a528b68 100644 --- a/src/cmd/venti/srv/icache.c +++ b/src/cmd/venti/srv/icache.c @@ -15,7 +15,19 @@ struct ICache IHash *hash; IEntry *entries; int nentries; - IEntry free; + + /* + * gcc 4.3 inlines the pushfirst loop in initicache, + * but the inliner incorrectly deduces that + * icache.free.next has a constant value + * throughout the loop. (In fact, pushfirst + * assigns to it as ie->prev->next.) + * Marking it volatile should avoid this bug. + * The speed of linked list operations is dwarfed + * by the disk i/o anyway. + */ + volatile IEntry free; + IEntry clean; IEntry dirty; u32int maxdirty; |