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IB/mthca: Use non-atomic bitmap functions when possible in 'mthca_allocator.c'

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The accesses to the 'alloc->table' bitmap are protected by the
'alloc->lock' spinlock, so no concurrent accesses can happen.

So prefer the non-atomic '__[set|clear]_bit()' functions to save a few
cycles.

Link: https://lore.kernel.org/r/5f909ca1284fa4d2cf13952b08b9e303b656c968.1637785902.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Christophe JAILLET 2021-11-24 21:42:32 +01:00 committed by Jason Gunthorpe
parent a277f38321
commit 19453f34cf
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/mthca/mthca_allocator.c
View file

@ -51,7 +51,7 @@ u32 mthca_alloc(struct mthca_alloc *alloc)
}
if (obj < alloc->max) {
set_bit(obj, alloc->table);
__set_bit(obj, alloc->table);
obj |= alloc->top;
} else
obj = -1;
@ -69,7 +69,7 @@ void mthca_free(struct mthca_alloc *alloc, u32 obj)
spin_lock_irqsave(&alloc->lock, flags);
clear_bit(obj, alloc->table);
__clear_bit(obj, alloc->table);
alloc->last = min(alloc->last, obj);
alloc->top = (alloc->top + alloc->max) & alloc->mask;