From 19453f34cf4916054cbbe499fd77715fde791622 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Wed, 24 Nov 2021 21:42:32 +0100 Subject: [PATCH] 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 Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mthca/mthca_allocator.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c index 57fa1cc202bc3..9f0f79d02d3c9 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; -- 2.30.2