From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Wed, 24 Nov 2021 22:40:26 +0100
Subject: RDMA/cxgb4: Use non-atomic bitmap functions when possible
Patch-mainline: v5.17-rc1
Git-commit: 223b4d5c8702a92fb18d14e3f32953e474313e5b
References: jsc#PED-1508
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/cxgb4/id_table.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/hw/cxgb4/id_table.c
+++ b/drivers/infiniband/hw/cxgb4/id_table.c
@@ -59,7 +59,7 @@ u32 c4iw_id_alloc(struct c4iw_id_table *
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 *
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);
}