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

This commit is contained in:

Doug Moore

2024-09-28 16:24:44 -05:00

parent 3873b9a8b3

commit 5a5da24fc8

1 changed files with 2 additions and 2 deletions

									
										sys/dev/mlx5/mlx5_ib/mlx5_ib_mem.c
									
		+2
		-2
	
												View File
												
				@@ -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 {