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RDMA/cxgb4: Use non-atomic bitmap functions when possible 

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/0c1c4505ca32f5ba4126e3e324041da191513ef2.1637789139.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 22:40:26 +01:00 committed by Jason Gunthorpe
parent 967a578af0
commit 223b4d5c87
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/cxgb4/id_table.c
View File

@ -59,7 +59,7 @@ u32 c4iw_id_alloc(struct c4iw_id_table *alloc)
alloc->last = obj + 1;
if (alloc->last >= alloc->max)
alloc->last = 0;
set_bit(obj, alloc->table);
__set_bit(obj, alloc->table);
obj += alloc->start;
} else
obj = -1;
@ -75,7 +75,7 @@ void c4iw_id_free(struct c4iw_id_table *alloc, u32 obj)
obj -= alloc->start;
spin_lock_irqsave(&alloc->lock, flags);
clear_bit(obj, alloc->table);
__clear_bit(obj, alloc->table);
spin_unlock_irqrestore(&alloc->lock, flags);
}