git: 5a5da24fc85a - main - mlx5: optimize ilog2 calculation

The branch main has been updated by dougm:

URL: https://cgit.FreeBSD.org/src/commit/?id=5a5da24fc85aa7711eed8f3e303c0cf6f5ebcca4

commit 5a5da24fc85aa7711eed8f3e303c0cf6f5ebcca4
Author:     Doug Moore <dougm@FreeBSD.org>
AuthorDate: 2024-09-28 21:24:44 +0000
Commit:     Doug Moore <dougm@FreeBSD.org>
CommitDate: 2024-09-28 21:24:44 +0000

    mlx5: optimize ilog2 calculation
    
    Rather than compute ilog2(roundup_pow_of_two(x)), which invokes ilog2
    twice, just use order_base_2 once.  And employ that optimization
    twice.
    
    Reviewed by:    kib
    Differential Revision:  https://reviews.freebsd.org/D46838
---
 sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c b/sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c
index bd06e531531b..9428e6ece3a4 100644
--- a/sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c
+++ b/sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c
@@ -78,10 +78,10 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr,
 	}
 
 	if (i) {
-		m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m);
+		m = min_t(unsigned long, order_base_2(i), m);
 
 		if (order)
-			*order = ilog2(roundup_pow_of_two(i) >> m);
+			*order = order_base_2(i) - m;
 
 		*ncont = DIV_ROUND_UP(i, (1 << m));
 	} else {