diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-11-24 23:42:32 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-11-25 20:29:06 +0300 |
| commit | 19453f34cf4916054cbbe499fd77715fde791622 (patch) | |
| tree | f5d060b3ebd00e4eaf4ca746adb12dc57281b141 /drivers/infiniband/hw/mthca | |
| parent | a277f383217a2c03f96166c5b33304c8b939532e (diff) | |
| download | linux-19453f34cf4916054cbbe499fd77715fde791622.tar.xz | |
IB/mthca: Use non-atomic bitmap functions when possible in 'mthca_allocator.c'
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>
Diffstat (limited to 'drivers/infiniband/hw/mthca')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_allocator.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c index 57fa1cc202bc..9f0f79d02d3c 100644 --- a/drivers/infiniband/hw/mthca/mthca_allocator.c +++ b/drivers/infiniband/hw/mthca/mthca_allocator.c @@ -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; |