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ata: ahci: use hweight_long() to count port_map bits

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Replace the open loop used to calculate the number of set bits
in the port mapping with the `hweight_long()` function, which
simplifies the code without altering its functionality.

Signed-off-by: TanZheng <tanzheng@kylinos.cn>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
TanZheng
2026-05-28 14:00:50 +08:00
committed by Niklas Cassel
parent aa0ae1c35f
commit f80cea8470
1 changed files with 1 additions and 5 deletions
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6
drivers/ata/libahci.c
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@@ -552,11 +552,7 @@ void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
/* cross check port_map and cap.n_ports */
if (port_map) {
int map_ports = 0;
for (i = 0; i < AHCI_MAX_PORTS; i++)
if (port_map & (1 << i))
map_ports++;
int map_ports = hweight_long(port_map);
/* If PI has more ports than n_ports, whine, clear
* port_map and let it be generated from n_ports.