x86/topology: use bitmap_weight_from()

Switch topo_unit_count() to use bitmap_weight_from().

Signed-off-by: Yury Norov <ynorov@nvidia.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c
index eafcb1fc185a..4913b64ec592 100644
--- a/arch/x86/kernel/cpu/topology.c
+++ b/arch/x86/kernel/cpu/topology.c
@@ -204,15 +204,11 @@ fwbug:
 static unsigned int topo_unit_count(u32 lvlid, enum x86_topology_domains at_level,
 				    unsigned long *map)
 {
-	unsigned int id, end, cnt = 0;
+	unsigned int end;
 
 	/* Calculate the exclusive end */
 	end = lvlid + (1U << x86_topo_system.dom_shifts[at_level]);
-
-	/* Unfortunately there is no bitmap_weight_range() */
-	for (id = find_next_bit(map, end, lvlid); id < end; id = find_next_bit(map, end, ++id))
-		cnt++;
-	return cnt;
+	return bitmap_weight_from(map, lvlid, end);
 }
 
 static __init void topo_register_apic(u32 apic_id, u32 acpi_id, bool present)