Commit bb60caa2 authored by Kemeng Shi's avatar Kemeng Shi Committed by Theodore Ts'o
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ext4: use is_power_of_2 helper in ext4_mb_regular_allocator 



Use intuitive is_power_of_2 helper in ext4_mb_regular_allocator.

Signed-off-by: default avatarKemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: default avatarRitesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230801143204.2284343-5-shikemeng@huaweicloud.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 919eb90c

fs/ext4/mballoc.c

+1 −4
Original line number Diff line number Diff line
@@ -2799,10 +2799,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac) 
	 * requests upto maximum buddy size we have constructed.

	 */

	if (i >= sbi->s_mb_order2_reqs && i <= MB_NUM_ORDERS(sb)) {

		/*

		 * This should tell if fe_len is exactly power of 2

		 */

		if ((ac->ac_g_ex.fe_len & (~(1 << (i - 1)))) == 0)

		if (is_power_of_2(ac->ac_g_ex.fe_len))

			ac->ac_2order = array_index_nospec(i - 1,

							   MB_NUM_ORDERS(sb));

	}